JPH06130272A - Camera provided with motor-driven zooming function - Google Patents

Abstract

PURPOSE:To obtain a camera provided with a zooming function which is easy to be used by constituting the camera so that a focusing action can be executed at the same time that a focal distance is changed without using a special switch or a special sensor. CONSTITUTION:When a zooming speed change-over switch 75 and a zooming set button 77 are operated, control processing related to power zooming is executed by a lens CPU 61. When a photographer turns an operation ring and sets the desired focal distance, he/she releases the hand from the zooming operation ring. Then, when the zooming operation ring is returned to a neutral position by the pressing force of an incorporated spring, a power zooming switch is changed to a turning-off state from a turning-on state and an off-edge is detected. By turning off the power zooming switch in such a way, a prescribed control procedure is executed and a distance to an object at a focusing time and the focal distance at that time are measured. Then, image magnification at that time is stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a zoom function for changing the focal length by operating a focal length setting member.

[0002]

2. Description of the Related Art Conventionally, a camera having a zoom function for changing a focal length by rotating a zoom ring as a focal length setting member has been provided. There is also provided a camera having a so-called AF function for automatically focusing a subject image. In a camera having such an AF function and a zoom function, the AF function is set to be exhibited for the first time when the shutter button is half-pressed and the photometric switch is turned on.

[0003]

Therefore, in a conventional camera having an AF function and a zoom function, for example, the photographer does not press the shutter button halfway (that is,
The AF function is not displayed when the focal length is changed by turning the zoom ring while looking through the viewfinder (without putting your finger on the shutter button). The image of the subject looked at was blurred, and the problem that it was difficult to use was pointed out, and improvement was requested.

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform a focusing operation at the same time when changing the focal length without using a special switch or sensor. Thus, it is to provide a camera having a zoom function that is easy to use.

[0005]

In order to solve the above-mentioned problems and to achieve the object, a camera having a zoom function according to the present invention includes a camera body, a zoom lens attached to the camera body, and a zoom lens. A focal length setting member for changing and setting the focal length of the lens, a focusing means for automatically focusing the subject image formed by the camera body, and a focal length setting member for controlling the focal length via the focal length setting member. It is characterized by comprising a control means for performing the focusing operation by the focusing means during the change. A camera having a zoom function according to the present invention includes a camera body, a zoom lens attached to the camera body,
A focal length setting member for changing and setting the focal length of the zoom lens, a focusing means for automatically focusing the subject image formed by the camera body, and a focus through the focal length setting member. When the distance is changed, there is provided a control means for causing the focusing means to start the focusing operation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of a camera having a zoom function according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a main configuration of a camera body 11 of an automatic focusing (AF) single-lens reflex camera to which this embodiment is applied, and FIG. 2 is a power detachably attached to the camera body 11. 2 is a block diagram showing a main configuration of a zoom lens 51, and
FIG. 3 is a block diagram showing the circuit configuration of the power zoom lens 51.

This AF single-lens reflex camera comprises a camera body 11 and a power zoom lens 51 as a taking lens which can be attached to and detached from the camera body 11. Most of the subject light flux that has entered the camera body 11 from the zoom optical system 53 of the taking lens 51 is reflected by the main mirror 13 toward the pentaprism 15 that constitutes the finder optical system, and part of the reflected light is measured. IC1
It is incident on the light receiving element 7 (not shown). On the other hand, of the subject light flux that has entered the camera body 11, a part of the subject light flux that has entered the half mirror portion 14 of the main mirror 13 passes through this, and is reflected downward by the sub mirror 19 at the rear side, and the CCD for distance measurement. It is incident on the sensor unit 21.

The photometric IC 17 is provided with a light receiving element for receiving the light flux of the object, logarithmically compresses and A / D converts the electric signal generated by the light receiving element according to the amount of received light, and through the peripheral control circuit 23. And outputs to the main (body) CPU 35 as a photometric signal. The main CPU 35 executes a predetermined calculation based on the photometric signal and the film sensitivity information to calculate an appropriate shutter speed and aperture value for exposure. Then, the exposure mechanism (shutter mechanism) 25 and the aperture mechanism 27 are based on the shutter speed and the aperture value.
To drive.

The distance measuring CCD sensor unit 21 is a so-called phase difference type distance measuring sensor, and although not shown,
It is provided with a splitting optical system that splits the subject light flux into two and a CCD line sensor that receives and integrates (photoelectric conversion and accumulates the electric charge thereof) the subject light flux split into two. Then, the CCD sensor unit 21 for distance measurement outputs the integrated data integrated by the CCD line sensor to the main CPU 35 as a control means. The distance measuring CCD sensor unit 21 is drive-controlled by the peripheral control circuit 23. Further, the CCD sensor unit 21 includes a monitor element, and the peripheral part control circuit 23 detects the subject brightness through this monitor element and changes the integration time according to the detection result.

The peripheral control circuit 23 executes a predetermined exposure calculation based on the digital photometric signal and the film sensitivity information to calculate an appropriate shutter speed and aperture value for exposure. Then, based on these shutter speeds and aperture values, the exposure mechanism (shutter mechanism) 25 and the aperture mechanism 2
7 is driven and exposed. Furthermore, the peripheral control circuit 23
At the time of release, the mirror motor 31 is driven through the motor drive circuit (motor drive IC) 29 to perform the up / down processing of the main mirror 13, and after the exposure is finished, the winding motor 33 is driven to wind the film.

Further, the main CPU 35 has a peripheral control circuit 23 and an electric contact group B provided on the body mount surface.
The lens CPU 61 is connected through the connection between C and the electric contact group LC provided on the mount surface of the power zoom lens 51.
Communicates data, commands, etc. with and.

The main CPU 35 is a CCD for distance measurement.
The defocus amount is calculated by a predetermined calculation (predictor calculation) based on the integrated data output from the sensor unit 21, and the rotation direction and the rotation speed of the AF motor 39 (the number of pulses of the encoder 41 are calculated based on the defocus amount). ) Is calculated. Then, the main CPU 35 drives the AF motor 39 via the AF motor drive circuit 37 based on the rotation direction and the number of pulses.

Further, the main CPU 35 is the AF motor 3
The pulse output from the encoder 41 is detected according to the rotation of 9, and the AF motor 39 is stopped when the pulse counts and the count value reaches the pulse number. The main CPU 35
The AF motor 39 is accelerated at once by DC drive at the time of startup to maintain the DC drive, and when the focusing lens group 53F approaches the target position, the AF motor 39 is gradually decelerated and stopped before the stop. Further, the main CPU 35 uses the encoder 4
It has a function of controlling the AF motor 39 at a constant speed based on the interval of one output pulse. The rotation of the AF motor 39 is performed by the AF provided on the mount portion of the camera body 11.
The photographic lens 5 is connected through a connection between the joint 47 and an AF joint 57 provided on the mount portion of the photographic lens 51.
1 is transmitted to the AF drive mechanism 55. Then, the AF driving mechanism 55 drives the focusing lens group 53F.

Further, the main CPU 35 has a ROM 35a storing a program and an RA storing predetermined data.
Built-in M35b, E ² P as external memory means
The ROM 43 is connected. In addition to various constants specific to the camera body 11, the E ² PROM 43 stores various functions and constants necessary for AF (autofocus) calculation and PZ (power zoom) calculation of the present invention.

The main CPU 35 is provided with a photometric switch SWS which is turned on by half-pressing a release button (not shown), a release switch SWR which is turned on by full-pressing the release button, an autofocus switch SWAF, and power supplies to the main CPU 35 and peripheral devices. Main switch SWM, AF to turn on / off
Mode, up / down switch SWUP / D for changing parameters such as exposure mode and shutter speed
OWN or the like is connected.

The AF CPU, the exposure mode, the shooting mode and other modes set by the main CPU 35 and the exposure data such as the shutter speed and the aperture value are displayed on the display device 45 by the main CPU 35. This display device 45 is
Usually, it is provided on the outer surface of the camera body 11 and at two places within the viewfinder field.

A pair of power supply pins BPC for supplying the electric power of the battery 20 to the photographing lens is provided near the mount of the camera body 11. On the other hand, the power zoom lens 51 is also provided with a pair of power supply pins LPC that are electrically connected to the power supply pins BPC when mounted.

The power zoom lens 51 has a zoom optical system 53 having a focusing lens group 53F and a zooming lens group 53Z as a photographing optical system.
The focusing lens group 53F is driven by the AF mechanism 55. The AF mechanism 55 includes an AF joint 5
The driving force of the AF motor 39 is transmitted via 7, 47. The moving amount of the focusing lens group 53F is the AF pulsar 5 that outputs a pulse in accordance with the rotation of the AF mechanism 55.
The lens CPU 61 counts and measures 9 AF pulses. The lens CPU 61 includes an AF pulse hard counter that counts AF pulses in hardware. The zooming lens group 53Z is driven by a PZ (power zoom) mechanism 67. The zoom motor 65 that drives the PZ mechanism 67 is controlled by the lens CPU 61 via the motor drive IC 63. The movement amount of the zooming lens group 53Z is measured by the lens CPU 61 counting the PZ pulse output from the PZ pulsar 69 in association with the rotation of the zoom motor 65.

The pulsars 59 and 69 are, for example, a rotating disc having a plurality of slits extending in the radial direction, which are provided at equal intervals in the circumferential direction, and an LED and a photo that face each other across the slit of the rotating disc. And a diode (photo interrupter). And each pulsar 59, 6
The rotating disk 9 rotates in conjunction with the rotation of the AF mechanism 55 and the PZ mechanism 67. In addition, LE of each pulsar 59, 69
ON / OFF of D is controlled by the lens CPU 61, and the output (pulse) of the photodiode is obtained by the lens CPU 61.
Entered in.

Further, the absolute position (focal length) of the zooming lens group 53Z and the focusing lens group 53F.
The absolute position (focused subject distance) of is detected by the zoom code plate 71 and the distance code plate 81, respectively. 4 and 5 are developed views of these code plates 71 and 81. Code strings 71a to 71f of the code plates 71 and 81,
Brushes 73 and 85 are in sliding contact with 81a to 81e, respectively.

Of the code plates 71 and 81, each one of the code lines 71a and 81a is grounded, and a plurality of code lines 71b to 71b.
71e and 81b to 81e are connected to the input port of the lens CPU 61. The zoom code plate 71 divides the entire movement range of the zooming lens group 53Z into 26, and identifies each divided area with 5-bit absolute position (focal length) information. The distance code plate 81 includes the focusing lens group 53.
The entire moving range of F is divided into eight, and each divided area is identified by 3-bit absolute position (subject distance) information. The relative position in each divided area is detected by counting the number of pulses output by the pulsers 69 and 59, respectively. The index 83 of the code string 81e of the distance code plate 81 is for detecting the center position of each area. The boundary position (switching point) 72 of each area of the code plate 71 and the index 83 of the code row 81e of the code plate 81 are respectively used as a reference for correcting the count value of the pulsar.

The power zoom lens 51 is provided with a zoom speed changeover switch 75 and a zoom set button 77 as operation switches. The zoom speed changeover switch 75 includes a switch (details not shown) for adjusting the zoom in the tele direction and the zoom in the wide direction and the zooming speed in each zoom direction in three stages in the power zoom mode. The zoom set button 77 includes a switch (D / M) for switching between power zoom and manual drive zoom, a manual power zoom mode, a PA switch for switching between a plurality of power zoom modes executed under constant control, and a control power zoom mode (image In the constant magnification power zoom mode), an SL switch for storing the current focal length and the like is provided.
The zoom speed changeover switch 75 is shown in FIG.
As shown in, the zoom lens is fitted in the lens barrel so as to be rotatable and movable in the optical axis direction, and is interlocked with the zoom operation ring 78 that is always biased to the neutral position in the rotational direction. The zoom operation ring 78 also has a mechanism for mechanically switching between the power zoom mode and the manual zoom mode by being moved along the optical axis direction.

The above zoom speed changeover switch 75
And each contact of the zoom set button 77 is a lens CPU
It is connected to 61. Upon receiving these switch operations, the lens CPU 61 performs control processing relating to power zoom.

The lens CPU 61 is an interface 6
2. Connected to the main CPU 35 via the communication contacts LC, BC and the peripheral part control circuit 23 of the camera body, and perform predetermined data communication by bidirectional communication with the main CPU 35. From lens CPU 61 to main CPU 35
As the data transmitted to, the maximum aperture value A _VMIN , maximum aperture value A _VMAX , minimum, maximum focal length, current focal length, current subject distance, K value information, AF pulse number, PZ pulse number, etc. There is. The K value information is the encoder 41 required to move the image plane formed by the zoom optical system 53 by a unit distance (for example, 1 mm).
This is the pulse number data of (AF pulser 59).

FIG. 3 is a block diagram showing a more detailed circuit of the power zoom lens 51. Electrical contact group LC
Is the CONT terminal connected to the interface 62, RES
It has five terminals, SCK terminal, DATA terminal and GND terminal. Among these terminals, CONT terminal and GN
A power supply voltage necessary for the operation of the lens CPU 61 and the like is supplied from the camera body 11 via the D terminal, and communication is performed via the remaining RES terminal, (2) SCK terminal and DATA terminal. The RES terminal is mainly used for reset signals, the SCK terminal is used for clocks, and the DATA terminal is used for communication of predetermined information and data such as commands. In the present specification, the symbol "■" means a top bar, and the symbol preceded by the symbol "■" represents an active low signal or an inverted signal. The power supply pin LPC is composed of a VBATT terminal and a PGND terminal. Electric power required to drive the zoom motor 65 is supplied from the battery 20 of the camera body 11 via these VBATT and PGND terminals. The power supply is controlled by the CPU 35 via the peripheral control circuit 23.
Incidentally, reference numeral 91 in the figure denotes a clock generation circuit. Also, VBAT
The T terminal is a port P12 for voltage monitoring of the lens CPU 61 via the motor drive IC 63 and the resistor R4.
Respectively connected to.

[Main Processing of Lens CPU] The main processing of the lens CPU 61 will be described with reference to FIGS. 6 and 7. Tables 1 and 2 show instruction commands, Table 3 shows commands (data) for sending data of various body sides from the camera body to the lens side, and commands for sending data of various lens sides from the lens. Table 4 shows memory maps of the RAM 61b of the lens CPU 61 in Tables 5-11. Tables 12 to 15 show a flag list for collectively explaining the flags used in the description of this embodiment.

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

[Table 6]

[Table 7]

[Table 8]

[Table 9]

[Table 10]

[Table 11]

[Table 12]

[Table 13]

[Table 14]

[Table 15]

In the main routine, first the lens CPU 6
1 sets the high-speed operation mode, prohibits interrupts, sets the stack address, initializes the port P, and inputs the current absolute zoom code from the zoom code plate 71 (S101 to S109). Then, the data calculated based on the zoom code is stored in the RAM 61b, and the data group (LC0 to LC0 in Table 5) stored in the RAM 61b by communication (old communication) by the clock signal of the camera body 11 is performed.
LC15) is transmitted to the camera body 11 (S11
1). Then, when the transmission is completed, the 3 ms timer is started (S113).

After that, when the old communication ends normally, a KAFEND signal ("L" level) is output from the interface 62, and this is waited until the 3 ms timer expires (S115, S117). Old communication end signal (KAFEND signal) before 3ms timer expires
If is not output, it means that the old communication has not been normally completed, so stop processing (stopping the clock 91) is performed to stop the processing (S115, S11).
7, S119). When the KAFEND signal is output before the time is up, the operation is normal, so the camera body 11
Although the command is received from the communication device from the device, if the command is not a new communication command for identifying that the camera is capable of new communication, the body may not be capable of new communication, so stop processing is performed (S121, S123, S11
9). The new communication is communication in which commands and data can be transmitted and received bidirectionally between the camera body and the taking lens in synchronization with the clock of the taking lens.

When a new communication command is received, a command reception completion signal is output to the camera body 11, the 2ms timer interrupt is enabled and the 2ms timer is started, and the new communication interrupt is enabled and other interrupts are enabled. Yes (S123, S125, S127, S128, S12
9). After this, 2ms timer interrupt processing and new communication interrupts are possible. The above processing is performed by the camera body 11
When the main switch is turned on and power is supplied from the body 11, it is first executed. After that, the following processing is repeated while the main switch is turned on.

The zoom code is input from the zoom code plate 71 (S131). If the zoom code is different from the last time,
By inputting the distance code data, the lens code data LC2 including this is stored in the RAM 61b (see Table 5),
Calculation is performed based on the zoom code data, and the calculated data is stored in the lens RAM 61b as LC0 to 17 and LB4 and LBB data (S133, S13).
5, S137). If the zoom code is the same as the last time,
The distance code data is input from the camera body 11 and the lens code data (LC2) including the distance code data is input to the lens RAM 6
The data is stored in a predetermined address of 1b (S133, S13
9, S141).

Next, a communication interrupt from the camera body
Whether there was a stop request (flag F STADB
Whether Y is set or not There was a power request from the lens within the 2ms timer interrupt (flag F)
LBATREQ is set), and when there is no stop request or when there is a power request, constant image magnification zoom processing (ISZ processing) is performed before NIOST processing, that is, S in the main routine.
Returning to 131, the above process is repeated (S143, S14).
5, S147). In addition, the power demand means the camera body 1
In order to drive the zoom motor 65, the power of the battery 20 in the camera 1 is supplied to the power zoom lens 51 via the power pins BPC and LPC.
U35) means to make a request.

When there is a request for stop and no battery request, stop processing is performed after stop preparation (2 ms timer interrupt disabled, stop release preparation) (S143, S145, S149, S151). That is, the lens CPU 61 stops the clock 91 and enters the low power consumption (standby) mode. This stop state (low power consumption mode) is released by, for example, a communication interrupt from the camera body, and returns to the normal operation (clock 91 operation). When the operation returns to the normal operation, the process returns to S153 after the communication interrupt routine ends, and when the stop request is lost or the power is requested by the communication interrupt, the 2ms timer interrupt is permitted and the 2ms timer start process is performed, and the process is returned to S131. Return, but otherwise return to S149 to enter the stop state (power saving mode) again (S1
53, S155, S157).

"INT1 Processing" The communication interrupt (INT1) processing shown in FIG. 8 executed by the lens CPU 61 will be described. The INT1 process is a process for making a communication interrupt, and is a process based on a command and data received by communication. The INT1 process is started when an interrupt signal from the interface 62 is input to the port PINTI of the lens CPU 61.

When the communication interrupt is entered, first, the communication interrupt is prohibited and the stop flag (F STADBY) and N
G flag (serial communication synchronous clock signal NG flag F
SCKNG and command NG flag F CMDN
After clearing G), a command is input from the camera body 11 (S201, S203, S205). And
Check the upper 4 bits of the input command, and proceed to the subroutine corresponding to the upper bit (S207-S
229). Further, in each subroutine, processing according to the lower bit is performed. In this embodiment, the high-order bit (4
LB command subroutine, BL command subroutine, instruction code subroutine, 16 byte data, first half 8 byte data, second half 8 byte data subroutine, 1 byte data subroutine, and test mode subroutine are provided as subroutines identified by (bit) (S209, S213). , S217, S
221, S225, S229).

If the above 4 bits are not the above set bits, the command NG flag F_CMNDNG is set, the communication interrupt is permitted, and the process returns to the main routine (S227, S231, S233).

"2ms timer interrupt processing" 2 shown in FIG.
The processing of the lens CPU 61 when an interrupt is input by the 2 ms timer will be described with reference to the ms timer interrupt flowchart. The 2ms timer is a built-in hardware timer of the lens CPU 61 that outputs an interrupt signal every 2ms, and the 2ms timer interrupt is interrupted on condition that the interrupt is enabled each time the 2ms timer times up. This is a regular interval process for performing.

When the 2 ms timer interrupt process is started, first, other interrupts are prohibited (S301). Next, the current value is input from the AF pulse counter and stored in the lens RAM 61b, and the current distance code data is input from the distance code plate 81 and stored in the lens RAM 61b (S303,
S305). Then, if necessary, the AF pulse number is corrected, and the current distance code is stored in another address of the lens RAM 61b as the previous distance code for the next 2 ms timer interrupt processing (S307, S309).

Next, the current zoom code is read from the zoom code plate 71, stored in the lens RAM 61b as the current zoom code, and the switching state of the zoom mode changeover switch 77 and the zoom speed changeover switch 75.
The switching state of is input (S311, S313). Then, in the power zoom mode, the process proceeds to the DZ process, and in the manual zoom mode, the process proceeds to the MZ process (S31).
5).

"DZ Process" The DZ and MZ processes shown in FIG. 10 are flowcharts relating to the electric (power) zoom process and the manual (manual) zoom process, respectively. These processes are executed by the lens CPU 61. In the power zoom (DZ) process, first, an end point detection process (end point detection subroutine) for detecting whether or not the zooming lens group 53Z has reached the end point is executed (S35).
1).

Next, the zoom speed changeover switch 75
And flag F MOVTRG, F Hula for controlling MOV, etc.
Flag, etc. for controlling the motor based on the
The current value of PZ pulse and focal length and R
Memory to AM61b, PZ pulse correction if necessary
And the current position of the zooming lens group 53Z.
If it is unknown, the zoom lens group 53Z
Position initialization (PZ-INITPOS) processing
For the next 2ms timer interrupt processing
Zoom code to another address as
Memory (S353, S355, S357).

Constant image magnification zoom mode (F ISM =
If 1) (ISZ processing), ISZ memory processing is performed, and the states of the zoom switches 75 and 77 are saved for the next 2 ms timer interrupt processing (S357 to S361).
Then, in accordance with the flag set in S353, drive control of the zoom motor 65, setting of an interrupt bit flag, duty ratio increase processing for PWM control, and P
During the WM control, the PWM timer is started (S363). Then, the interrupt is permitted and the process returns (S395).

In the manual zoom (MZ) subroutine, first, the zoom motor 65 is stopped, the LED of the PZ pulsar 69 is turned off, and the battery request (power request) flag (F LBATREQ) and each bit of the PZ lens state PZ-LST data are cleared (S371, S373, S375, S379).

Next, the data regarding the PZ control is cleared from the predetermined address of the lens RAM 61b, and the zoom code is stored (memory) for the next 2 ms timer interrupt processing (S381, S383). Then, the number of PZ pulses roughly detected from the zoom code is set to the current PZ pulse value (PZPX) and the PZ pulse start value (PZPS
TART) is stored in the lens RAM 61b as a PZ
Clear the pulse counter (PZPCNT). Also,
The current value of the roughly detected PZ pulse is converted into the current focal length (rough data) and stored (S383, S385, S).
387).

Then, the states of the zoom switches 75 and 77 are saved for the next 2 ms timer interrupt processing, the 2 ms timer is started, the 2 ms timer interrupt is enabled, and INT3 is set.
(PZ pulse count) interrupt and INT2 (PW
M) Disable interrupts (S389 to S393). Then, the other interrupts are permitted and the process returns (S395).

"PWM Control Method" The PWM control method will be described with reference to the flow charts shown in FIGS. FIG. 11 shows 2 ms shown in FIGS. 9 and 10.
This is an excerpt of the part related to the PWM control of the timer interrupt routine. In addition, FIG. 12 is similar to FIGS.
This is an excerpt of the part relating to the PWM control of the PZ pulse count interrupt routine shown in FIG. FIG. 13 shows PW
It is a PWM interrupt routine (brake process) during M control.

Now, the relationship between the main flow of FIG. 6 and various interrupt routines will be described. S127 to S131 and S131 to S157 of the main flowchart of FIG.
In the routine of, communication interrupt, 2ms timer interrupt,
It is possible to interrupt by either PZ pulse count interrupt or PWM interrupt. Further, in the communication interrupt routine, it is possible to interrupt by a 2 ms timer interrupt, a PZ pulse count interrupt, or a PWM interrupt.

In the PWM control, the ratio of the energized time and the non-energized time (PWM duty ratio T The speed is controlled by increasing or decreasing (PWMBRK). That is, in this embodiment, if the PZ pulse does not come within the set time, the PWM duty ratio T Increase PWM BRK and zoom motor 6
The speed is increased by lengthening the energization time to No. 5, and if the PZ pulse comes within the specified time, the PWM duty ratio (T
The constant speed control is realized by the control of decreasing the PWMBRK) to shorten the energization time to the zoom motor 65 to reduce the speed (see FIG. 14).

Further, in this embodiment, the duty ratio is set to the minimum (the energization time is the shortest) at the time of start-up (when the motor changes from the stopped state or the brake state to the operating state), and then the zoom motor 65 is set. Energization is started, and the pulses output from the PZ pulsar 69 are counted. Then, when the pulse is not output within the set time, the duty ratio is gradually increased, while when the pulse is output within the set time, the duty ratio is decreased to output the pulse in the set time cycle. Acceleration control and constant speed control. In addition, by setting the duty ratio at the time of starting the motor to the minimum, it is possible to enable a fine driving operation by the photographer,
A natural zooming motion is obtained.

First, whether the zoom motor 65 is activated for the first time (flag F It is checked whether START is set (S401). The first activation means the time when the driving state is changed from the stop state or the time when the braking state is changed to the driving state. Here, if it is the first time to start, in order to start at the lowest speed, the PWM timer
Clear T_PWM, PWM duty ratio T PWM
Set BRK to the minimum value (lowest speed) and proceed to S405. If not started, proceed to S405 without doing anything (S
401, S403).

In S405, the pulse interval (pulse period T) corresponding to the speed set by the zoom speed changeover switch 75 or the like is set. PWMPLS) is set and the zoom motor 65 is energized (S405, S407). That is, the pulse interval T This means controlling the zoom speed so that the PZ pulse is output by PWMPLS.

Next, it is checked whether the PWM drive or the DC drive is in accordance with the speed. If the PWM drive, the process proceeds to S411, but if the DC drive, the process directly returns (S40).
9). In S411, the PWM timer T Increment PWM by 1. Then, the incremented value is the pulse period T It is checked whether the value of PWMPLS is exceeded, and if it is exceeded, the PWM duty ratio (T P
WMBRK) is increased and nothing is done unless it exceeds (S413, S415). That is, the set time (pulse cycle T If there is no PZ pulse in (PWMPLS), then P
WM duty ratio (T The PWM BRK) is increased to lengthen the energization time to increase the speed up to the set speed.

Then, the PWM duty ratio (T PW
Set MBRK and set PWM timer (T PWM)
Is started, and the 2 ms timer interrupt is enabled, and the processing ends (S417, S419). The portions S407 to S419 correspond to times (A), (C) and (D) in FIG.

When the PZ pulse is output from the PZ pulser 69, the PZ pulse count interrupt process shown in FIG. 12 starts. In the PZ pulse count interrupt processing, first, the pulse cycle T PWMPLS and PWM timer T Compare with PWM, pulse period T If PWMPLS is larger, pulse period T Since the pulse is output in the PWMPLS, the PWM duty ratio T PWM timer T after lowering PWMBRK PWM is cleared, pulse cycle T
If PWMPLS is smaller, one pulse period T P
Since the pulse is output after WMPLS has elapsed, the PWM timer T Clear PWM and end (S421, S42
3, S425).

In the PWM interrupt routine of FIG. 13, the interrupt is prohibited, the zoom motor 65 is braked, and the I
The NT2 (PWM) interrupt is prohibited, other interrupts are permitted, and the process returns (S431 to S437). The processing of this part corresponds to the time (B) in FIG.

In the PWM control of this embodiment, the pulse period T
Set the PWMPLS to the zoom speed switch 75
In accordance with the speed designated by, etc., the low speed is set to 8 steps, the medium speed is set to 4, and the high speed is set to 3 steps. Also, the PWM timer T PWM is at motor startup and PZ pulser 69 to P
The Z pulse is output, and is cleared when the PZ pulse count interrupt process is started. After that, the count is incremented in S411 of the 2 ms timer interrupt routine until the PZ pulse is output. Therefore, the PWM timer T PWM is
It almost represents a multiple of the elapsed time since the output of the previous PZ pulse. However, the output interval of the PZ pulse is longer than the cycle of the 2 ms timer interrupt even at the high speed.

For example, at high speed 3 (pulse cycle T P
The elapsed time from the previous output of the PZ pulse of WMPLS = 3) is 2 ms × 3 = 6 ms. At low speed 8, pulse period T PWMPLS = 8. The processing at the low speed will be described with reference to the flowcharts shown in FIGS. 11 and 12. 2ms timer interrupt S41
3, the pulse period T PWMPLS is PWM timer T When it is determined that it is smaller than PWM, that is, when a time longer than 2 ms × 8 = 16 ms has passed since the PZ pulse was output last time, the process proceeds to the process of increasing the PWM duty ratio (S415).

On the contrary, in the PZ pulse count interrupt processing, in the check of S421, the pulse cycle T
PWMPLS is PWM timer T When it is larger than PWM, that is, 2ms after the previous PZ pulse was output.
Since the PZ pulse has been output before the passage of × 8 = 16 ms, the PWM duty ratio is lowered (S423).

As described above, the set pulse period T
The PWM duty ratio (T By raising and lowering (PWMBRK), constant speed control in which the output interval of the PZ pulse becomes constant is realized. Also, the pulse period T to be set
By changing PWMPLS, the output interval of PZ pulses, that is, the control speed can be changed.

"Constant Image Magnification Zoom" Next, the constant image magnification zoom (ISZ) will be described. A constant image magnification zoom is an image magnification m represented by m = f / D, where m is the image magnification (shooting magnification), D is the subject distance, and f is the focal length.
Is to control the focal length f so as to be constant regardless of the fluctuation of the subject distance D.

First, the principle of constant image magnification zoom will be described. In order to simplify the description, description will be given based on a zoom lens including two groups, a front group and a rear group. The image magnification m of this zoom lens is expressed by the following equation (1). m ₁ = x / f ₁ m ₂ = f / f ₁ m = m ₁ · m ₂ = x · f / f ₁ ² (1) where, m: image magnification m ₁ : front group magnification m ₂ : rear Magnification of group f ₁ : Focal length of front group f: Combined focal length x: Front lens extension amount (movement amount) from ∞ end

When the amount of extension when setting the image magnification is x ₀ and the focal length is f ₀ , the image magnification m ₀ is m ₀ = x ₀ · f ₀ / f ₁ ² (2)

Here, when the lens is moved to x by the focusing processing, the image magnification can be made constant by obtaining the focal length f where the image magnification m ₀ satisfies the following expression (3). _{m 0 = x · f / f} 1 2 ... (3) above (2) and from (3), and _{x 0 · f 0 / f 1} 2 = x · f / f 1 2. Therefore, the required focal length f is f = x ₀ · f ₀ / x (4)

Further, by the AF distance measurement, the lens extension amount x
If the defocus amount Δx is obtained at the time of, the target focal length f can be obtained by the following formula: f = x ₀ · f ₀ / (x + Δx) (5)

The above is the principle of constant image magnification zooming.
In actual control, the lens extension amount is managed by a focal length code plate, an AF pulsar, or the like. AF
The pulsar is configured to have a substantially linear relationship with the delivery amount. Therefore, the feed amount x in the equations (4) and (5)
And x ₀ can be considered by replacing them with the AF pulse number from the ∞ end and the defocus amount with the defocus pulse number.

Next, an actual calculation method in this embodiment will be described. In this embodiment, the lens CPU 61 performs a constant image magnification zoom (control zooming) operation. The calculation may be performed based on the image magnification sent from the camera body 11 or may be performed based on the subject distance and the focal length at a certain time.

(1) When the image magnification m ₀ is sent from the body (i) From m ₀ , a provisional set value, the number of feeding pulses x _0, and the focal length f ₀ are obtained. First, let f ₀ = | f ₁ | (6). Assuming that the feeding amount corresponding to x ₀ is X, m ₀ = X · f ₀ / f ₁ ² (7) according to the equation (2). When the number of feeding AF pulses per 1 mm of the lens feeding amount is k, x ₀ = X · k (8) By substituting the equations (6) and (7) into the above equation (8), the target feed pulse number x ₀ can be obtained by the following equation. x ₀ = m ₀ · | f ₁ | · k (9)

(Ii) Next, from equations (6) and (9), x ₀
Calculate f ₀ and set the result as x ₀ f ₀ . x ₀ f ₀ = x ₀ · f ₀ (10)

(Iii) Obtain the target focal length f. When the calculation is performed based on the current position (current number of feeding pulses) x, it is obtained by the following formula. f = x ₀ f ₀ / x (11) When obtaining based on the defocus pulse number Δx, it is obtained by the following formula. f = x ₀ f ₀ / (x + Δx) (12)

(2) When obtaining based on the number of extension pulses x ₀ and the focal length f ₀ stored in the lens RAM 61b (i) x ₀ · f ₀ is obtained by the number of extension pulses x ₀ and the focal length f ₀ stored in memory. The calculation result is set as x ₀ f _{0 in the same} manner as the expression (10). x ₀ f ₀ = x ₀ · f ₀

(Ii) The magnification m ₀ is defined by the above (7), (8) and
From the equation (10), the following equation is obtained. m ₀ =
x ₀ f ₀ / (f ₁ ² · k) (13) (iii) Obtain the target focal length f. The target focal length f is obtained in the same manner as (iii) in (1) above. The focal length f ₁ of the front lens group is data specific to the lens, and the lens RO
It is stored in the M61a.

[ISZ Processing] Next, the calculation processing relating to the constant image magnification (image size designation) zoom (ISZ) of the present embodiment based on the above principle will be described in more detail with reference to the flowcharts shown in FIGS. 15 and 16. Explained. This processing is executed by the lens CPU 61. The image magnification is set by the zoom speed changeover switch 75 or the set switch (SL switch). Details will be described later with reference to FIG. 90. IS
The Z calculation relates to calculation of a set image magnification and calculation of a focal length for maintaining the set image magnification. The calculation of the focal length may or may not be based on focusing, may be performed by the taking lens, or may be performed by the camera body.
When the focus is set as the condition, the image magnification and the target lens extension amount are calculated based on the lens extension amount at the time of focusing. When focusing is not a condition, the image magnification and the target lens extension amount are calculated based on the defocus amount and the current focal length.

First, communication interruption is prohibited (SEI), and
Which is based on the communication information transferred from Melabody 11
Flag (F STI
S, F ISZM, F ISZFOM, F ISZXO
M) to check (S451, S453, S46)
5, S477, S479). These flags are for the camera
Communication regarding ISZ has been performed with the body 11.
And the RAM 61b when each communication is performed.
Set (memory) to. And based on these flags
Then perform the necessary calculations.

Where F STIS is a flag F that indicates that the ISZ operation should be performed based on the image magnification data transferred from the body. ISZM is a flag F that instructs to perform ISZ calculation based on the current value of the AF pulse and the current value of the focal length. ISZFOM and F ISZXOM is the focal length and AF pulse transferred from the body together.
This is a flag for instructing to perform the SZ operation. If both flags are not set, the operation is not executed. ISZFOM is a flag, F, which indicates the use of focal length f data from the body. ISZXOM is a flag for instructing to use subject distance x data from the body.

When a constant image magnification zoom is performed by the image magnification sent from the camera body 11 (F (When STIS = 1), the communication interrupt is permitted (CLI), and (6) above,
The RAM 61 is obtained by calculating x ₀ × f ₀ by the equations (9) and (10).
The memory is stored in the specified address of b, the interrupt is prohibited, and the flag F Clear STIS (S455-S463).

When the memory processing of the image magnification is performed and the constant image magnification zoom is performed according to the focal length and the subject distance which are already stored (F STIS = 0, F IS
When ZM = 1), the interruption is permitted, and the subject distance (the number of feeding pulses) x ₀ and the focal lengths f ₀ to x _0.
× calculates f _0, the (13) memory and those seeking the image magnification m ₀ to the predetermined address of RAM61b by formula, a flag F prohibits the communication interruption Clear ISZM (S465-S475).

Focal length f sent from camera body 11
_When performing a constant image magnification zoom with ₀ and the subject distance (the number of feeding pulses) x ₀ (F STIS = 0, F I
SZM = 0 and F ISZFOM = 1, F ISZXO
In M = 1), x ₀ f ₀ is first obtained and stored based on the received focal length f ₀ and subject distance x _0. Further, the image magnification m ₀ is obtained by the equation (13), and interruption is prohibited. , Flag F ISZFOM, F Clear ISZXOM (S477-S489). If none of the above,
No communication is performed with the camera body 11 regarding the calculation of ISZ.

Next, the flag F is used to determine whether the defocus amount Δx already sent from the camera body 11 is valid.
Check by the state of FPREOK, and if valid, flag F Set FPRE but flag F if not valid Do not set FPRE (S491, S49
3). The flag F FPREOK indicates a flag indicating that the calculation for obtaining the target focal length has already been executed using the defocus pulse. Flag F F
The PRE calculates the target focal length using the defocus pulse in the constant image size mode (S503-
It shows a flag for instructing execution of S513). Here, in this embodiment, the defocus amount and the predictor amount are used, but these accurately mean the defocus pulse.

Then, it is checked whether or not the ISZ zoom mode is set. In the ISZ zoom mode, the current position (subject distance) of the focusing lens 53F is known (that is, the lens CPU correctly determines the current position of the focusing lens). Flag F indicating that recognition is being performed {count} Check if AFPOS is set, and if it is recognized correctly (F AFPOS
= 1), the FP that controls using the predictor operation result
Proceed to RE-OP processing, and if not recognized correctly, I
Exit the SZ processing (S495, S497).

If not in the control zoom (ISZ) mode,
Flag F FPREOK, F FPRE, F ISOK
Are cleared, and a predetermined address (LNS
The data obtained by taking the logical sum of each bit data of INF1) and each bit of bit "00000111B" is stored at a predetermined address (L
NS INF1) is memorized and the ISZ process is exited (S
495, S498, S499).

"FPRE-OP processing" S501 to S51
Predictor calculation result (defocus amount) shown in 3
A target focal length f is calculated based on the (FPRE-OP)
The processing will be described with reference to the flowchart in FIG. This is a process executed by the lens CPU 61, and when the defocus amount is sent from the camera body 11 by communication with the camera body 11 (flag F during this communication). The FPRE is set (stored) in the RAM 61b) and the communication with the camera body 11 regarding ISZ is performed to S453 to S463 and S465 to S47.
5 or S477 to S489 is executed and x ₀ f ₀
Value is changed, and flag F is determined by S491 to S493. Executed when FPRE is set. This flag F FPRE is a flag for deciding whether or not to execute the calculation of the target focal length f based on the defocus amount, f = x ₀ f ₀ / (x + Δx).

Upon entering this processing, the flag F It is checked whether FPRE is set and it is determined whether or not the arithmetic processing with the predictor amount is performed (S50).
1). Flag F S if FPRE is not set
If it is set to 515, the following processing is performed.

First, the flag F FPRE is cleared, the communication interrupt is prohibited, the target focal length f is obtained by the formula (12) using the predictor amount, and the communication interrupt is prohibited (S
503-S509). Next, the target focal length f is set to WID
A flag F indicating that the target PZ pulse number from the E terminal is converted and stored in a predetermined address (PZPFPRE) of the RAM 61b, and that the calculation by the predictor amount is effective.
Set FPREOK and proceed to S515 (S511,
S513).

Steps S515 to S521 are processing for obtaining the target focal length f based on the current AF pulse (the number of feeding pulses). In step S515, interrupt permission (CLI) processing is performed, and the target focal length f is calculated by the equation (11) and RAM is calculated.
61b predetermined address (ISZ FL, H) and perform interrupt disable (SEI) processing (S515, S)
517). Further, the calculated target focal length f is converted into a target PZ pulse from the WIDE end, and the pulse conversion value is R
The data is stored in the predetermined address (PZPF) of the AM 61b (S519, S521).

Here, LENS_calculated in S529
The contents of bits 3 to 7 of INF1 will be described. LE
The NS_INF1 information (see Table 4) is information that is periodically sent from the lens to the body through communication with the camera body. Among them, bits 3 to 7 are information regarding the ISZ mode.

Bits 6 and 7 are the target PZ pulse (PZPFPRE or PZ obtained by the ISZ calculation.
PF) is a flag indicating whether it is on the WIDE side or the TELE side as compared with the PZ pulse at the current position. WI
If it is on the DE side, bit7 is set, if it is on the TELE side, bit6 is set, and if they match, bi
Neither t6 nor t7 are set.

Bits 3 to 5 represent the difference between the target PZ pulse number and the PZ pulse number at the current position, that is, the PZ pulse number required to move from the current position to the target position, as the total number of PZ pulses (from WIDE end to TELE). The approximate value divided by the number of PZ pulses required to move to the end is 0 to 7 /
It is expressed in 1/8 unit in the range of 8. Bit3 is 1 for weighting
/ 8, bit4 is 1/4, and bit5 is 1/2. When the current position and the target position match, the above value is 0, so bits 3 to 5 are all cleared to “0”, and if the current position is the WIDE end and the target position is the TELE end or vice versa, it is set to 7/8. Therefore, bits 3-5 are all "1"
Is set to.

As described above, in the ISZ mode, the camera body 11 can transmit appropriate ISZ control information to the taking lens 51 by receiving the LNS_INF1 information from the taking lens 51 regularly or when necessary. it can.

Next, the predictor calculation result is valid (F
FPREOK = 1) is checked, and if valid, the target PZ pulse number (PZPFPRE) obtained using the predictor operation is stored in the accumulator (ACC), and if not valid, based on the current AF pulse number. The calculated target PZ pulse number (PZPF) is stored in the accumulator (S523, S525, S527). next,
L based on the target PZ pulse number entered in the accumulator
NS The values of bits 3 to 7 of INF1 are calculated, and RAM6
1b Predetermined address (LNS INF1 bit3 ~
The memory is stored in 7) and interrupt inhibition (SEI) processing is performed (S529, S531).

Then, the constant image magnification zoom mode is selected, and the lens CPU sets the zooming lens group 53.
Correct recognition of the current position (focal length) of Z (flag F PZPOS = 1) and zooming with constant image magnification (flag F The following process is performed under the condition of ISOK = 1), but if any of the above conditions is missing, the process jumps to S551 (S533 to S537).

The calculation of the target focal length (the number of PZ pulses) based on the predictor calculation result is effective (flag F FP
If REOK = 1) and the ISZ control flag is set (flag F ISZD = 1), the number of PZ pulses obtained using the predictor calculation result (according to equation (11))
Is stored in a predetermined address (PZPTRGT) of the RAM 61b as the target pulse number (S539, S54).
1, S543). However, the calculation of the target focal length based on the amount of prediction is invalid (F FPREOK = 0) or ISZ
If the control flag is cleared, P obtained by the equation (12) based on the AF pulse (feeding pulse number) at the current position
The number of Z pulses is stored in the predetermined address (PZPTRG) (S539, S541, S545). The flag F ISZD is data sent by communication from the body 11 and stored in the RAM 61b. I
When SZD = 1, the calculated value according to the predictor calculation result is IS
Execute Z control, F When ISZD = 0, ISZ control is executed with a calculated value according to the current position of the AF pulse.

Then, the ISZ zoom speed data (BD is sent from the camera body 11 by communication and stored in the RAM 61b). ST6 bit6, 7)
To a predetermined address in the RAM 61b (b in SPDDRC2
It2, 3) is stored in memory, and a constant image magnification zoom flag F
ISZ is set, interrupts are enabled, and the process returns (S547, S549, S551). This constant image magnification zoom flag F ISZ indicates that the lens CPU 61 has completed the calculation of the target focal length and the drive setting of the zoom motor 69, and the preparation for driving the zoom lens group 53Z has been completed. This F When ISZ is set, constant image magnification zoom processing is performed in the 2 ms timer interrupt routine. In addition, PZPTRG, SPDDRC
The value of is also used in the 2ms timer interrupt routine.

[Instruction Processing] Next, an instruction code (command) from the camera body 11
The instruction processing executed in the taking lens 51 when receiving the is described with reference to the flowcharts shown in FIGS. 19 to 26 and Tables 1 and 2 showing the contents of the instruction code. Note that these instruction codes are the details of S217 of the communication interrupt routine of FIG. Each instruction process is executed according to the lower contents of the command. The STANDBY command is a command for putting the lens CPU 61 into a sleep state. FIG. 19 shows a flowchart regarding the processing when the STANDBY command is input.

When the lens CPU 61 receives the STANDBY command, the flag F STNDBY is set, a command reception completion signal is transmitted to the body 11, a communication interrupt is permitted, and the process returns (S601, S602,
S603). The lens CPU 61 uses the flag F STND
Check BY in S143 of the main routine,
This flag F When STNDBY is set, the clock 91 is stopped and the low power consumption state (standby mode) is entered (see FIG. 7).

The AF-INITPOS command is a command sent after the camera body 11 moves the focusing lens 53F to the ∞ end by the AF motor 39.
A to clear the AF pulse counter of the taking lens 51
This is an F initialization processing command. This AF-INITP
FIG. 20 is a flowchart showing the processing of the lens CPU 61 when the OS command is input.

The lens CPU 61 uses the AF-INITPO
When the S command is input, first, the distance code data is input from the distance code plate 81 (S611). If the distance code data is at the ∞ end (far end), the AF pulse current position data (AFPXL,
H) and AF pulse start position data (AFPSTR
TL, H) to clear that the current position of the focusing lens 53F is known. AF
Set POS and proceed to S615. If not at ∞ end,
Skip the above steps and proceed to S615 (S612
~ S614). Then, the command reception completion signal is output to the body 11, the communication interrupt is permitted, and the process returns (S
615, S616).

The PZ-INITPOS command is a command that causes the lens CPU 61 to perform an initialization operation in order to know the position of the zooming lens. In the present embodiment, when the zoom motor 65 is activated and the code boundary 72 of the zoom code plate 71 is detected, the P corresponding to the code is detected.
The number of Z pulses is set in the PZ pulse counter. PZ-
FIG. 21 is a flowchart showing the processing when the INITPOS command is input. Note that processing such as PZ pulse counting is described later in "POS-NG processing".
(FIG. 86) will be described.

When the lens CPU 61 inputs the PZINTPOS code, the flag F Clear PZPOS,
Each flag F BATREQ, F IPZB, F MOV
Is set, predetermined data (minimum speed, direction TELE) is stored in SPDDRC1 of the lens RAM 61b, and PZPA2B of the PZ pulse counter that counts the PZ pulse from the current position to the code boundary is set to 0 (S621 to S621). S624). Then, the command reception completion signal is output, the communication interrupt is permitted, and the process returns (S
625-S626). Based on these set values, the power zoom related (PZ) initialization operation is performed during the 2 ms timer interrupt processing.

The RETRACT-PZ command is a command for power zooming so that the lens barrel length of the taking lens 51 becomes the shortest when the main switch of the camera body is turned off. FIG. 2 is a flowchart regarding processing when a RETRACT-PZ command is input.
2 is shown.

The lens CPU 61 uses this RETRACT
When the -PZ command is received, the current focal length data is transferred to the predetermined address (RETPOSL,
H), and the PZ pulse data (lens-specific data) that minimizes the lens barrel length is set to a predetermined address (PZPTRGT) in the lens RAM 61b, and SPDD is set.
Predetermined data (highest speed) is set in RC2 (S63)
1, S632, S632-2). Then, each flag F
BATREQ, F IPZB and flag F MOVTR
G is set, a command reception completion signal is transmitted, communication interruption is permitted, and the process returns (S634 to S636).

The focal length data before retracting (storing) is transmitted to the camera body 11 by another communication command (FOCALLEN-X command). The flag F BATREQ is a flag that requests the power zoom lens 51 to supply power for power zooming, and the flag F IPZB controls zooming in the lens (ISZ,
PZ-INITPOS, etc.), and a flag F MOVTRG is the address PZ
This is a flag that is executed in the 2 ms timer interrupt process so as to move the zooming lens 53Z to the target pulse position set in PTRG. In the 2 ms timer interrupt routine, the storing operation for the zooming lens 53Z is performed based on these set values.

The RET-PZPOS command is RETR
Zooming lens group 53Z by ACT-PZ command
Is a command for returning from the stored state to the state before storing. That is, this is a command for returning the zooming lens 53Z to the state before storing (returning to the focal length position before retract power zooming) when the main switch SWMAIN of the camera body is turned on. This RE
FIG. 23 is a flowchart showing the processing when the T-PZPOS command is input.

The lens CPU 61 uses the RET-PZPOS
When the command is received, the focal length data (RETPOSL, H) before the retract included immediately before the retract power zoom included in this code is sent to the lens RAM 61b.
Is set to a predetermined address (FCLL, H) (S64
1). At this address RETPOSL, H, the focal length data before storage sent from the camera body 51 by another communication command is stored.

Then, the focal length data is set to the target pulse.
Converted to a number, the lens R is set as the target pulse number PZPTRG
Memory at a predetermined address of AM61b, SPDDRC
Store the specified PZ speed data (high speed) in 2 and
Rag F BATREQ, F IPZB, F MOVTRG
Is set, a command reception completion signal is sent, and a communication interrupt
Permitting and returning (S642 to S646). Na
This restoration process is also performed in the 2ms timer interrupt process.
Done.

The IPZ-STOP command is a command for stopping the power zooming operation. This command is for ISZ (constant image magnification), PZ-INIT
This is a command to stop control power zooming such as POS (return) and RETRACT-PZ (store).
It does not stop the manual power zoom. FIG. 24 shows a flowchart regarding the processing when the IPZ-STOP command is input.

The lens CPU 61 is an IPZ-STOP controller.
If you enter a command, the flag F Clear ISOK,
Furthermore, a predetermined flag regarding execution of the power zoom operation
(F MOVTRG, F MOV, F Clear ISZ)
(S651, S652). Here, flag F IS
Z indicates the drive of the power zoom lens in ISZ.
The flags shown are shown. And command reception completed
Output signal, enable communication interrupt, and return (S
653, S654). These flags will be cleared
Therefore, in the 2ms timer interrupt processing, the manual powers
Other than power control, such as ISZ control power zooming
It will not be done.

The ISZ-MEMORY command is a command for inputting and storing the current values of the AF pulse and the focal length in order to perform the constant image magnification zoom.
FIG. 25 is a flowchart showing the processing when the ISZ-MEMORY command is input.

The lens CPU 61 is ISZ-MEMOR.
When the Y command is input, the current value of the AF pulse counter (AFPXL, H) is displayed in the ISZ AF pulse memory (ISZ
AFPL, H) (predetermined address of lens RAM 61b), and the current focal length value (FCLXL, H)
ISZ focal length memory (ISZ FCLL, H) (predetermined address of lens RAM 61b) (S6)
61, S662). And flag F The ISZM is set, the command reception completion signal is output, the communication interrupt is permitted, and then the process returns (S663 to S665). Based on these values, the ISZ operation shown in S465 to S475 of FIG. 15 is performed.

The ISZ-START command is a command for starting the constant image magnification zoom. ISZ-S
FIG. 26 is a flow chart regarding the processing when the TART command is input.

The lens CPU 61 uses this ISZ-STA.
When you enter the RT command, each flag F BATRE
Q, F IPZB, F ISOK is set, a data transmission completion signal is output, a communication interrupt is permitted, and the process returns (S671 to S673). Based on these flags, the 2 ms timer interrupt processing and the processing after S537 in FIG. 18 are performed.

[BL Command Subroutine] Next, the operation of the taking lens 51 when receiving a BL command from the camera body 11 will be described with reference to FIGS. 27 to 37 and Table 3. This BL command communication process is different from the instruction command subroutine in that a command reception completion signal is first output, data is then input, and an input completion signal is output. Note that these BL commands are details of the S213 process in the communication interrupt routine of FIG. Each command process is executed according to the subordinate contents of the command.

The PZ-BSTATE command (20)
Send data required for ISZ (constant image magnification zoom control)
It is a command. The data sent by this command
The focusing lens 53F is at the far end (infinity).
Edge) (F Near end (most recent distance)
Edge) (F ENDN = 1) or the firmware (F
FARM = 1) or near move (F NEARM = 1)
Or during overlap integration (F Whether OVAF = 1)
Or the moving object prediction mode (F Whether MOBJ = 1)
Focused state (F Memory of image magnification, whether AFIF = 1)
When you do, it will be memorized by the instruction (communication) of the body,
Whether to store the memory according to the judgment of the lens itself (lens CPU 61)
 (F Data regarding ISM = 1) etc. is included. Figure 2
7 indicates when the PZ-BSTATE command is received.
The flowchart regarding a process is shown.

The lens CPU 61 uses PZ-BSTATE.
When a command is input, a command reception completion signal is sent, and the camera body 11 sends 1-byte PZ-BSTAT.
Input E data, C for AF pulse count processing
Execute the NTAFP subroutine (S701 to S70
3). The details of the CNTAFP subroutine are shown in FIG.
9 to 43, which will be described later with reference to these figures.

Then, the data input completion signal is output, the communication interrupt is permitted, and then the process returns (S704, S7).
05). Since the camera of this embodiment has an AF drive source mounted on the body 11, the AF drive must be performed by this command before AF drive and when changing the drive direction when counting AF pulses in the lens 51. Direction information or the like is sent from the body 11 to the lens 51.

The BODY-STATE0 command is a command for informing the taking lens of data relating to the body state, and is transmitted during regular communication between the taking lens and the camera body. FIG. 28 shows a flowchart regarding processing when the BODY-STATE0 command is received.

The lens CPU 61 uses this BODY-ST
When the ATE0 command is input, a command reception completion signal is transmitted, and 1-byte body state data (BODY-STATE0) is input from the camera body 11.
The data is stored in BD_ST0 of the lens RAM 61b (S711 to S713). Then, the upper 5 bits of the 1-byte data are masked to make the lens RAM 61b.
When the data is stored in ZM_MODE, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S71).
4-S716).

In the BODY-STATE0 data, as information regarding the power zoom mode of the camera body 11, for example, information such as constant image magnification zoom (ISZ), inter-exposure zoom (EXZ), and manual power zoom (MPZ) is placed in the lower 3 levels. The power supply of the body circuit system is turned on (F VDD = 1),
Metering switch is on (F SWS = 0), or is power being supplied from the body 11 to the zoom motor (F BATT = 1) and whether the AF / MF selector switch (not shown) of the body 11 is AF or MF (F SWAF =
Whether the AF mode is single or continuous is entered. The flag F SWAF is a flag indicating switching information of the AF / MF switching switch on the body side, and is set to indicate AF when set and MF when cleared.

Flag F BATT is set on the camera side (by the main CPU 35) when power is supplied to the terminal VBATT. On the other hand, on the lens side, the lens CPU 61
When the voltage level of the terminal VBATT is monitored through the port P12 and the voltage is supplied, the power-on detection flag F of PZ is detected. Set BDET. And
Flag F BDET is taken into the camera side (main CPU 35) by POFF-STATE communication. Flag F on the camera side Since the BDET is set, it is understood that power is being supplied normally. Flag F Flag F even though BATT is set When BDET is cleared, it is recognized that some abnormality has occurred, and the power supply to the terminal VBATT is stopped.

BODY-STATE1 command is BOD
It is a command related to data transmission regarding the state of the camera body 11 similar to the Y-STATE0 command, and includes sequence state information of the camera body 11. FIG. 29
In the figure, there is shown a flowchart relating to the processing when the BODY-STATE1 command is received.

The lens CPU 61 uses the BODY-STAT
When the E1 command is received, a command reception completion signal is transmitted to send 1-byte data (BOD
Y-STATE1) and input B of the lens RAM 61b.
Store in D_ST1 (S721 to S723). And flag F Flag F if IPZD is set
After clearing ISOK, the flag F of the address BD_ST1 is further cleared. MOVTRG, F MOV, F Clear ISZ, but flag F If IPZD is not set, the above process is not performed (S724, S725, S7).
26). Then, the data input completion signal is output, the communication interrupt is finally permitted, and the process returns (S724, S72).
7, S728).

Flag F The operation when IPZD is set (S725 to S726) is the same processing as the IPZ-STOP command of the instruction code 35. This command causes the lens CPU 61 to receive the information on the body side and at the same time to execute the IPZ-STOP command. The flags related to this command will be described.

F_IPZD is IPZ-S as described above.
It is a flag that determines whether or not the same operation as TOP is performed. F_MPZD is a flag that determines whether or not manual power zoom is prohibited, and manual power zoom is prohibited when F_MPZD is set. The flag F_MPZD is referred to in the 2 ms timer interrupt process.

F ISZD is a flag that determines whether ISZ control is performed with the focal length obtained based on the number of AF pulses at the current position (in focus) or the focal length obtained with the predictor amount. This flag is referred to in the operation processing routine of ISZ (S541 in FIG. 18). F_I
SSPA and F_ISSPB are flags that determine the ISZ control speed, and are referred to in S547 of FIG.

FIG. 30 is a flow chart showing the processing when the SET-AFPOINT command is received. The lens CPU 61 is SET-AFPOIN
When the T command (23) is input, a command reception completion signal is output, and 1-byte SET-AFPO from the body side
The INT data is received and set at a predetermined address of the lens RAM 61b, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S731 to 735).

The SET-AFPOINT command is LB
It is executed before communication of the command, LENS-AFPULSE (15). In the LENS-AFPULSE command, which AFPULSE is sent from the lens 51 to the body 11 is determined based on the information sent by the SET-AFPOINT command.

When bit3 (X) is set, the number of AF pulses at the current position (AFPULSE (AFP
XL, H)) is sent. When bit7 (ISZM) is set, the AF pulse number (AFPULSE (ISZ_AFP) when the image magnification is stored in the ISZ mode is stored.
L, H)) is sent. Note that bit3 and bit7 are not set at the same time. When bit3 and bit7 are not set, bit4 to 6 (FM0, FM
1, FM2) becomes effective.

In the lens RAM 61b of the lens CPU 61, there are eight areas (0 to 0) for storing AF pulse data.
No. 7) is prepared (AFP0L, H to AFP7L,
H), AF pulse data can be stored in each address by a command from the body 11. In addition,
Addresses 0 to 7 are designated by 3 bits of bits 4 to 6, and the AF pulse data stored in the addresses are sent. Note that this command is LENS-AFPU
This command simply specifies which AF pulse data to send to the body 11 in the LSE (15).

FIG. 31 is a flow chart showing the processing when the SET-PZPOINT command is received. The lens CPU 61 is SET-PZPOIN
When the T command (24) is input, a command reception completion signal is output, SET-PZPOINT data is received from the body side and set to a predetermined address in the lens RAM 61b, a data input completion signal is output, and communication interruption is enabled. Then, the process returns (S741 to 745).

The SET-PZPOINT command is LB
It is executed before communication of the command, FOCALLEN-X (16). FOCALLEN-X command, SET
-By the information sent by the PZPOINT command,
Which of the focal length data at the current position and the focal length when the image magnification is stored in the ISZ mode is sent to the body 11 is determined.

When bit3 (X) is set, the focal length data (FCLXL, H) at the current position is sent. When bit7 (ISZM) is set,
Focal length when image magnification is stored in ISZ mode (focal length of ISZ memory (ISZ_FCLL, H))
To send. Note that bit3 and bit7 are not set at the same time. When bit3 and bit7 are not set, bits4 to 6 (FM0, FM1, FM2) are valid.

In the lens RAM 61b, eight areas (0 to 7) for storing the focal length are prepared (FC
L0L, H to FCL7L, H), SE from body 11
The focal length can be stored in each address by the T-PZPOINT command. Of which, bit4
Specify addresses 0 to 7 with 3 bits of ~ 6,
Send the focal length stored to that address. It should be noted that this command is only a command to specify which focal length to send to the body 11 in FOCALLEN-X (16).

The STORE-AFP command is a command for setting predetermined AF pulse data at a specified address. FIG. 32 shows a flowchart regarding the processing when the STORE-AFP command is received.

The lens CPU 61 is a STORE-AFP
When the command (25) is received, a command reception completion signal is output and 2-byte data is input from the camera body 11 (S751, S752). If a bit in the input data is not ISZ memory (ISZM
= 0), the address (AFP0L, H-A of the lens RAM 61b designated by AM0-AM2 in the data)
FP7L, H) and if it is an ISZ memory (I
SZM = 1), the ISZ memory of the lens RAM 61b (I
SZ-AFPL, H) (S751 to S75)
6). Then, the ISZ calculation flag F ISZXOM is set, a data input completion signal is output, a communication interrupt is permitted, and the process returns (S757 to 758).

STORE-DEFP & D command (2
6) is a command for causing the lens RAM 61b to store the defocus amount and defocus pulse relating to AF on the camera body 11 side. In FIG. 33, STORE-
9 shows a flowchart regarding processing when a DEFP & D command is received.

The lens CPU 61 uses the STORE-DEF
When the P & D command is received, the command input completion signal is output, the 2-byte defocus pulse data and the 2-byte defocus amount data are input from the camera body 11, and the input defocus pulse is halved (S761). ~ S764). In this embodiment, the body AF pulse: lens AF pulse is 2: 1, so the input defocus pulse is halved. Note that this ratio can be set arbitrarily.

Then, the flag F If SIGN is cleared, the current AF pulse number is added to the defocus pulse number and stored in ISZ_FPX. SIG
If N stands, the defocus pulse number is subtracted from the current AF pulse number and stored in ISZ_FPX (S7).
65-S767). Flag F F when SIGN = 1
Defocus amount toward the end of AR, flag F SIGN =
When it is 0, it is the defocus amount toward the NEAR end side. And flag F FPRE is set, a data input completion signal is output, a communication interrupt is permitted, and the process returns (S765.
~ S771). The defocus pulse sent by communication in this manner is used in the ISZ calculation routine for calculation for obtaining the target focal length using the defocus pulse. Also, the flag F FPRE is an instruction flag for performing calculation using the defocus amount.

The STORE-PZP command (27)
This is a command for storing the current AF position (focusing lens position or focused subject distance) and current PZ position (zooming lens group 53Z position or focal length) in a specified memory (address). STOR
The E-PZF command (28) is a command for storing the focal length designated by the camera body 11 at a predetermined address.

FIG. 34 is a flow chart showing the processing when the STORE-PZP command is received. Upon receiving the STORE-PZP command, the lens CPU 61 outputs a command reception completion signal and inputs 1-byte data from the camera body 11 (S78).
1, S782). When the PZ memory is designated in this data (when the PZM flag is set), the focal length data at the current position is stored in the addresses (FCL0L, H to FCL7L, H) designated by FM0 to FM2. However, if it is not the PZ memory, it is not stored (S7
83, S784).

Further, when the AF memory is designated (when the F_AFM flag is set), the AF pulse number at the current position is set to the address (AFP0L, H to AFP7L, H) designated by AM0 to AM2. Memory and
If it is not an AF memory, nothing is done, a data input completion signal is output, a communication interrupt is permitted, and the process returns (S
785-S788).

FIG. 35 is a flow chart showing the processing when the STORE-PZF command is received. When the lens CPU 61 receives the STORE-PZF command, it inputs 2 bytes of data from the camera body 11, and if this is not an ISZ memory (flag F
Input 2 if ISZFM is not set)
The byte data is the address (FCL0L, H to F of the lens RAM 61b designated by the bits FM0 to FM2).
CL7L, H), and if it is an ISZ memory (F
If the ISZM is standing), enter the entered data into the ISZ
Flag F for storing in the memory for use and executing the ISZ calculation based on the focal length Set up ISZFOM (S791
~ S796). Then, a data input completion signal is output,
Allow communication interruption and return (S797 to S79)
8).

The STORE-IS (29) command is used for the image magnification memory (address ISZ-I of the lens RAM 61b).
MGL, H) is a command for storing the image magnification in memory.
FIG. 36 shows a flowchart regarding the processing when the STORE-IS command is received.

Upon receiving the STORE-IS command, the lens CPU 61 outputs a command reception completion signal,
2 bytes of image magnification data is input from the camera body 11, and the data is stored in the image magnification memory (ISZ-IMG).
L, H) and flag F STIS is set (S801 to 804). Then, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S805.
~ S806). The flag F STIS is a constant image magnification zoom I based on the image magnification sent from the body side.
This is a flag for executing the SZ calculation.

The MOVE-PZMD command (2A) is
Designated direction or designated memory (lens RAM 61b
This is a command for power zooming to the focal length of (address of). The MOVE-PZf command (2B) is a command for power zooming to a designated focal length, for example, the focal length calculated by the camera body 11, and the data transmitted / received by this command includes data relating to the focal length and zooming speed. .

FIG. 37 is a flow chart showing the processing when the MOVE-PZMD command is received. When the lens CPU 61 inputs this MOVE-PZMD command, it outputs a command input completion signal,
Input 1-byte data from the camera body 11 (S
811 to S812). Then, the flag F in the input data If MDM is set, the addresses (FCL0L, H to FCL7L, specified by MVM0 to MVM2,
The data is read from H), converted into PZ pulse data and stored in PZPTRGET of the lens RAM 61b, and the drive speed data (F of bits 6 and 7) SPA,
F SPB) in SPDDRC2 and flag F
Set MOVTRG, but flag F If MDM is down, the upper 4 bits of the input data will be used as the address SPD.
Store in DRC1, flag F The MOV is set (S813 to S819). These data are referred to in the 2 ms timer interrupt routine, and the power zoom of the specified operation is performed.

Flag F LBATREQ and F IP
When ZB is set, the data input completion signal is output and
The communication interrupt and return (S820-S820
-2). The flag F MDM (bit3) is standing
, The focal length stored in the specified memory
It becomes a command to power zoom away, and the flag F MD
When M is not standing, flag F MDT, F MD
Power zoom in the direction indicated by W (bits 4, 5)
Command. Flag F MDT is in TELE direction
Specify drive and flag F MDW drives in WIDE direction
Specify and flag F SPA, F SPB (bit6,
7) specifies the zooming speed.

FIG. 38 is a flow chart showing the processing when the MOVE-PZf command is received. When the MOVE-PZf command is input, the lens CPU 61 outputs a command reception completion signal, inputs 2-byte focal length data from the camera body 11, converts the input focal length data into PZ pulse data, and converts the input focal length data into PZ pulse data. Store at address PZPTRGT,
Set drive speed data in SPDDRC2 and set flag F BATREQ, F IPZB, F MOVTRG
Set. These data are referred to in the 2ms timer interrupt routine to execute the power zoom of the specified operation. Then, the data input completion signal is output, the communication interrupt is permitted, and then the process returns (S821 to S82).
7).

"CNTAF processing" Next, the photographing lens 51
The AF pulse count processing in the above will be described with reference to the flowcharts shown in FIGS. Note that this counting process is performed by the PZ-BSTATE of FIG.
It is the details of the processing of S703 of the command (20). In the present embodiment, when the focusing lens 53F reaches the far end (infinity shooting position), the value of the AF pulse counter is cleared to 0, and when it reaches the near end (shortest shooting position), the maximum value of the AF pulse is reached. Set in the counter. Then, the AF pulse output from the AF pulsar 59 is
Add for near move (driving in the closest distance direction),
Subtract when the firmware is driven (in the direction of infinity).

First, interrupts are prohibited, the data input by communication is stored in the address PZ_BDST, and the current distance code is input from the distance code plate 81 (S901 to S901).
905). Then, the flag F for identifying the far end (infinity position) If ENDF is set, it is checked whether the input distance code is the far end code (S907 to S909). If the distance code is the far end, the current AF pulse value and AF pulse count start value (addresses AFPXL, H, AFPSTR)
(Contents of TL and H) are cleared and a flag F indicating that the AF pulse at the current position is known AFPOS is set up (S909, S913, S915). Further, a flag F for identifying a near move If NEARM is cleared, jump to CNTAFP10 processing, and if standing, the driving direction changes, so jump to CNTAFP11 processing (S917). If the detected distance code is not the far end code, far end flag F Clear ENDF and C
Jump to NTAFP3 processing (S909, S911).

Fur end flag F ENDF is cleared
When it is, make sure that it is at the near end (the closest focus position)
Near end flag F for identification Check ENDN and click
If so, proceed to CNTAFP3 (S919). D
Edge flag F When ENDN is standing,
Check if the cord is the near end cord, and
Far end flag F if not the end code ENDN
Clear and proceed to CNTAFP3 processing (S919 to S9)
23). When the distance code is near end, the current AF
Set the loose count value and AF pulse count start value
Set to large value (N_AFMAXL, H to AFPXL,
H, AFSTRTL, H)), and the current AF
Flag F indicating that the loose value is known AFPO
Set S, Farm Move (F With FARM = 1)
Check if it is CNT if it is firmware
Proceed to AFP11 processing, if it is not firmware, CNT
Proceed to AFP10 processing (S925 to S929).

As described above, the fur end (F ENDF =
1) Or near end (F When ENDN = 1),
The count value of the AF pulse is corrected by a predetermined value. However, if the input distance code is judged and it is not at the end point, the end point correction is not performed.

Processing when the focusing lens group 53F is between the far end and the near end (CNTAFP3 processing)
This will be described with reference to the flowchart shown in FIG.

First, the counter value of the hard counter of the current AF pulse is set to the AF pulse counter (AFPCNTL,
H) (S931, S933). Flag F
When FARM is cleared, the process proceeds to CNTAFP6 processing, and when FARM is set, whether or not it was the near move last time (flag F It is checked whether or not NEARMO is set (S933, S935). When changing from near move to firm move, set AF pulse count start value (AFPSTR, H) to AF
The pulse count value (AFPCNTL, H) is added and stored in the predetermined current AF pulse value and AF pulse count start value memory AFPXL, H & AFSTRTLL, H and the process proceeds to the CNTAFP12 process (S935, S93).
7).

If it was not near move last time, it is checked whether it was firmware before, and if it was not firmware, that is, if it was not moving, it proceeds to CNTAFP11 processing, and if it was also firmware last time, the driving direction has changed. Since it does not exist, the count value (AFPCNTL, H) is subtracted from the AF pulse count start value (AFPSTR, H), and the difference is stored in the current AF pulse value (AFPXL, H).
The process proceeds to TAFP16 processing (S939, S941).

CNT when not currently in firmware
The AFP6 process will be described with reference to the flowchart shown in FIG. Note that the CNTAFP6 process is A
It is also the first routine that is entered after the start of F processing. First, it is checked whether it is near move. If it is not near move, the process proceeds to the CNTAFP8 process (S951). If it is a near move, it is checked whether it was a near move last time. If it was also a near move last time, the AF pulse count start value (AFPSTRTL, H) is added to the AF pulse count value (AFPCNTL, H), and the sum is now calculated. It is stored in the AF pulse value (AFPXL, H) of (S953, S955).

If it is not near move last time, and the drive direction has changed, the AF pulse count start value (AFFPSTRL, H) is used to determine AF.
The P count value (AFPCNTL, H) is subtracted, and the difference is stored in the current AF pulse value and AF pulse count start value (AFPXL, H & AFSTRTLL, H) (S957, S959). If it is not the previous firmware, the process proceeds to the CNTAFP11 process (S957).

The processing (CNTAFP8 processing) when the AF motor 39 is stopped will be described with reference to the flowchart shown in FIG. In the CNTAFP8 processing, first, it is checked whether or not it was a near move last time (S961).

If it was the near move last time, the AF pulse count start value (AFP
AF pulse count value (AFPCN) in STRTL, H)
TL, H) and add the sum to the current AF pulse value and AF pulse count start value (AFPXL, H & AF
(PSTRTL, H) and the process proceeds to the CNTAFP10 process (S961, S963). When the firmware is the previous firmware, it is stopped from the firmware, so the AF pulse count value (AFPCTRTL, H) is subtracted from the AF pulse count start value (AFFPTRTL, H) to obtain the current AF pulse value and AF pulse count start value (AF
PXL, H & AFSTRTL, H) before proceeding to CNTAFP10 processing (S961, S965, S
967). If it is neither near move nor firm move last time, the process is stopped, so the process proceeds to the CNTAFP16 process (S96
1, S965).

The CNTAFP 10, 11, 12, 16 processing will be described with reference to the flowchart shown in FIG. Since the CNTAFP 10 enters immediately after the AF motor 39 stops, the LED of the AF pulsar 59 is turned off, the contents of PZ_BDST are stored in PZ_BDST0, the communication interrupt is permitted, and then the AF pulse count processing is exited (S971, S977, S979).

Since the AF driving start is entered in the CNTAFP11 processing, the LED of the AF pulsar 59 is turned on and A
F pulse hardware counter and AF pulse count value memory (AFPCNTL, H) are cleared, and PZ_BDST
Memory content of PZ_BDST0, communication interrupts are permitted, and AF pulse count processing ends (S97).
3, S975, S977, S979).

The CNTAFP12 process is entered when the driving direction changes during AF driving, so the AF pulse hard counter and AF pulse count value (AFPCTL,
H) is cleared and the memory contents of PZ_BDST are changed to PZ_
The process moves to BDST0, the communication interrupt is permitted, and then the AF pulse count process is terminated (S975, S977, S97).
9).

For the CNTAFP16 process, the near-movement or firm-movement drive in the same direction (S655, S64
1) or while the AF motor is stopped (S965), the memory content of PZ_BDST is moved to PZ_BDST0, the communication interrupt is permitted, and then the AF pulse count processing is exited (S977, S979).

LB Command Processing Next, the lens side information such as the lens state is transferred from the power zoom lens 51 to the camera body 11 in response to a request from the camera side.
The process related to the command to be transferred to will be described with reference to Table 4 and the flowcharts shown in FIGS. The contents of these commands are shown in Table 4. The flowcharts shown in FIGS. 44 to 51 are detailed diagrams of the process shown in S209 in the communication interrupt routine of FIG. Corresponding processing is executed depending on the lower contents of the command.

[PZ-LSTATE Processing] The flowchart shown in FIG. 44 relates to the PZ-LSTATE (10) processing, and is processing for sending data regarding the power zoom control state of the power zoom lens 51 to the camera body 11. When the lens CPU 61 receives a lens state (PZ-LSTATE) request command regarding power zoom, it outputs a command reception completion signal and then outputs data regarding the power zoom control state (PZ_LS).
T), for example, whether or not zoom control with constant image magnification is being performed is output to the camera body 11 (S1001, S10).
02). Then, the data transmission completion signal is output, the communication interrupt is permitted, and the process returns (S1003, S100).
4).

The contents of the flags used in this processing will be described. The flag F_TMOV (bit 0) is
Set when the zoom motor is moving in the TELE direction. The flag F_WMOV (bit 1) is set when the zoom motor is moving in the WIDE direction.
The flag F_TEND indicates that the zooming lens group 53Z is T.
Set when at the ELE end. Flag F_WEN
D is set when the zooming lens group 53Z is at the WIDE end. The flag F_IPZB is set when performing a power zoom operation (ISZ / PZ initializing operation, storage operation) other than the manual power zoom. The flag F_IPZI is set when the manual power zoom operation is performed during ISZ. Flag F
_ISOK is set during ISZ operation. The flag F_MPZ is set during the manual power zoom operation.

[POFF-STATE, POFFS-W
SLEEP processing "In FIG. 45, POFF-STATE
The flowchart regarding (11) processing and POFFS-WSLEEEP (12) processing is shown. These processes are processes for sending switch information relating to the power zoom of the lens, battery request information, PZ power supply (battery) monitor information, and the like to the body 11. POFF-STA
The difference between TE (11) and POFFS-WSLEEEP (12) is whether or not the lens CPU 61 enters the low power consumption mode after the completion of this command communication. POFF
If this is executed, the S-WSLEEEP (12) command processing causes the flag F during the main communication. This command sets STNDBY and shifts to the low power consumption mode when returning to the main routine. That is, POFFS-WS
The LEEP (12) command is POFF-STATE.
(11) and instruction code STANDBY
This is a command for executing both the contents of the command (30).

The lens CPU 61 uses the POFFS-WSL.
In case of EEP (12) command, flag F STNDB
Set Y to output a command reception completion signal and
Input the state of H (75, 77) (S1011 to S1)
015). And flag F STNDBY is set
When (POFFS-WSLEEEP (12)
Electric / manual switch (D / M switch)
When the power is on, and the Tele or Wide switch (switch
When the speed change switch) is turned on,
Terry request flag F Set BATREQ to S1025
If so, proceed to S1025 otherwise.
(S1017, S019, S1021, S1023).

The flag F Normally, when STNDBY is set, this communication interrupt is ended, and when the process returns to the main routine, the mode shifts to the low power consumption mode. If BATREQ is set, flag F Even if STNDBY is set, the normal operation can be continued without shifting to the low power consumption mode, and the operation of the manual power zoom can be performed (see FIG. 7).

Further, the flag F When STNDBY is not set, the mode does not shift to the low power consumption mode even when returning to the main routine, so the PZ speed switch 75
If is turned on, the flag F in this command BAT
Operations such as manual power zoom are possible without setting REQ. Flag F When STNDBY is cleared (when POFF-STATE (11))
If so, the process directly proceeds to S1025.

In step S1025, the input zoom mode is turned off.
Flag F depending on the changeover switch 77 SLSW, F AS
SW, F PZM, F PZD, F Set AFSW
Or clear. Then, change the state of the terminal VBATT.
The power for the zoom motor 65 from the camera body 11.
Flag F if no power is supplied Clear BDET
(VBATT off), and flag F if supplied B
Set DET (VBATT ON) (S1027 ~
S1031). And the 1-byte day set above
Data (POFF-ST) to the camera body 11
A data output completion signal is output, communication interrupts are enabled, and
(S1033 to S1037).

Here, the flag F SLSW is a flag that indicates that the zoom set button SL of the power zoom lens 51 is turned on by being set and that it is turned off by being cleared. Also, the flag F When the ASSW is set, the slide switch of the power zoom lens 51 is in the AS position (that is,
It is a flag indicating that the self-back position, in other words, the auto power zoom mode change position), is present at a position (P or A) other than the above by being cleared. Also, the flag F When the PZM is set, the slide switch of the power zoom lens 51 is AS
Alternatively, it is a flag indicating that it is in the A position (that is, auto zoom) and that it is in the P position (that is, manual power zoom) when it is cleared.

Further, the flag F PZD is a flag on the power zoom lens side that indicates whether the switch of the power zoom lens 51 is electric or manual, and indicates electric zoom when set and manual zoom when cleared. Also, the flag F AFSW is Power Zoom Lesbian 5
A flag indicating the state of the AF switch No. 1 indicates the AF state when set and the MF state when cleared.

At the time of POFF-STATE processing, S
1011 flag F The STNDBY setting process is skipped and the process goes to S1013, and then POFFS-WSLEEEP.
The same process as the process is executed.

[LENS-INF1 Processing] The flow chart of LENS-INF1 shown in FIG.
Is a process of sending the variable information of No. 1 to the camera body 11.

The lens CPU 61 uses the LENS-INF1
When a data request command is input, a command reception completion signal is transmitted, and of the 1-byte LNS_INF1 data,
Clear 2 bits for power zoom direction, AE
After setting 1 bit that identifies the lens as an auto lens, the zoom direction switch information is input (S104).
1 to S1043). Then, the corresponding bit is set according to the input switch information, and is output to the camera body 11 as 1-byte lens data (S1044, S).
1045). Then, the data transmission completion signal is output, the communication interrupt is permitted, and the process returns (S1046 to S10).
47). It should be noted that the LNS_INF1 data includes data related to the constant image magnification zoom process. Details are as described above.

[LENZ-INF2 Processing] The flow chart of LENS-INF2 shown in FIG.
This is a process of transmitting unique fixed data to the camera body 11. When the LENS-INF2 command is input, the lens CPU 61 outputs a command reception completion signal and LN
The S-INF2 data is output to the camera body 11, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S1051 to S1054). LENS-INF
The 2 data includes data for identifying the lens version, whether or not the lens is a PZ lens, etc. These data are fixed values and are stored in the lens ROM 61a.

"LENS-AFPULSE processing" FIG.
The flow chart of LENS-AFPULSE shown in is a process of outputting the lens AF pulse count value to the camera body 11. As already mentioned, LENS
-Before communication of AFPULS command, be sure to set-AF
POINT command communication is performed. This SET-AF
LENS-AFPU depending on the content of the POINT command
The LSE command determines which AF pulse is sent to the body.

The lens CPU 61 uses the LENS-AFPU.
When the LSE command is input, a command reception completion signal is output, and when the current AF pulse is requested,
The current AF pulse number (AFPXL, H) is stored in a register (not shown) (S1061 to S1063). When a constant image magnification zoom (ISZ) pulse is required, ISZ AF pulse data (ISZ-AFP).
L, H) are stored in the register (S1062, S10)
64, S1065). If neither, AF pulse data (AFP0L, H-A) at the specified address
FP7L, H) is stored in the register (S1062,
S1064, S1066). Then, the AF pulse data set in the register is output to the camera body 11, the data transmission completion signal is output, the communication interrupt is permitted, and the process returns (S1067 to S1069).

[FOCALLEN-X Processing] The FOCALLEN-X processing for outputting the focal length data of the power zoom lens 51 to the camera body 11 will be described with reference to the flowchart shown in FIG. As described above, the SET-PZPOINT command communication is always performed before the FOCALLEN-X command communication.
Depending on the contents of this SET-PZPOINT command,
It determines which focal length is sent to the body when a FOCALLEN-X command is received.

The lens CPU 61 uses the FOCALLEN-
When the X command is received, a command reception completion signal is output, and when the current focal length is requested, the current focal length (FCLXL, H) is stored in the register (S1071 to S1073). Constant image magnification zoom (IS
When the focal length (ISZ-FCLL, H) of Z) is requested, the focal length data of the constant image magnification zoom is stored in the register (S1072, S1074, S10).
75). When the focal length of the WIDE end is requested, the focal length of the WIDE end is stored in the register (S4401, S4403), and when the focal length of the TELE end is requested, the focal length of the TELE end is set. Store in register (S4405, S4407),
If neither is the case, the focal length (FCL0L, H to FCL7L, H) of the designated address is stored in the register (S1072, S1074, S1076). Then, the focal length data set in the register is output to the camera body 11, the data transmission completion signal is output, the communication interrupt is permitted, and the process returns (S1077 to S107).
9).

[IMAGE-LIZE Processing] The flowchart of IMAGE-LIZE shown in FIG. 50 is stored in a predetermined address of the lens RAM 61b.
This is a process of sending image magnification data for constant image magnification zoom control to the camera body 11.

The lens CPU 61 is an IMAGE-LSI.
When a ZE command is input, a command reception completion signal is output to the camera body 11, data (ISZ-IMGL, H) relating to image magnification (image size) is output to the camera body 11, a data transmission completion signal is output, and communication is performed. Return after enabling interrupts (S1081 to S108)
5).

"16-byte data processing" 1 shown in FIG.
The 6-byte data flowchart is a process of sending all 16-byte basic lens data to the camera body 11. Note that this command is the details of the processing in S221 of the communication interrupt routine of FIG. Each command is executed according to the contents under the command. The first half 8 by
Since te and the latter half 8 byte processing are the same as 16 byte data communication, the details are omitted.

When the 16-byte command is input, the lens CPU 61 sends a command reception completion signal to the camera body 11
16 bytes of predetermined data (LC0 to LC1
5) is output to the camera body 11, a data transmission completion signal is output, communication interruption is permitted, and the process returns (S10).
91-S1095).

[PZ Processing of Body] Next, the processing relating to the power zoom on the camera body 11 side will be described with reference to FIGS.
This will be described with reference to the flowchart shown in FIG. This processing is performed by the main (body) CPU of the camera body 11.
It is executed by the main CPU 35 based on the program stored in the ROM 35a of the CPU 35.

In this main flow processing, the main switch is turned on (when the battery is inserted and the power is turned on), etc.
When the main CPU 35 is reset, it enters first. When this process starts, the RAM 35b, the port settings, etc. are initialized, the switch input, the E ² PROM
Predetermined information is input by data input or the like, and a power zoom initialization process (PZINIT subroutine) is executed (S1101, S1103, S1105). In the present embodiment, the power zoom initialization is a process for causing the PZ lens to perform an initialization process for detecting the zooming lens position, an initialization process for detecting the focusing lens position, and the like. The above is when the power is first turned on (when the main switch (not shown) is turned on)
In the above process, while the power is on, the next step (S
1107) and subsequent processes are repeated.

In step S1107, predetermined information is input. If it is not locked (if the main switch is on), photographing is possible, so the procedure proceeds to predetermined processing. If it is unlocked (main switch is turned off). If so, the process proceeds to the lock process after step S1181 (S).
1109).

When the lock is released, if the lock is released for the first time, or if it is the first processing after the taking lens is attached, the flag F NEWCOM
Clear (Flag that stands when old communication with the shooting lens ends and new communication starts), and PZ initialization flag F The power zoom is initialized by clearing PZINIT (S1109 to S1115, S112).
1, S1123).

If it is neither the first unlocking nor the first processing with the taking lens attached, it is the first AF mode, or if the first PZ mode is set, AF, P
In order to initialize various operations, data, etc. regarding Z, a flag F that is set when these are initialized
PZINIT, F Clear AFINIT together, P
Call the ZINIT subroutine (S1111, S
1113, S1117 to S1123, S4901).

Next, after inputting the switch information, the processing regarding the power zoom (PZLOOP subroutine) is executed, a predetermined display is performed on the display panel 45, and the process proceeds to step S1133 (S1127 to S1131).

After that, in step S1133, it is checked whether or not the photometric switch SWS (AF switch) is turned on, in other words, it is determined whether or not the release switch is half pressed. If it is determined in step S1133 that the photometric switch SWS is off, the process proceeds to step S4501.
It is determined whether the AF mode is set. In this embodiment, the AF mode (a mode for executing the automatic focusing operation) is set by turning on the AF switch, and the MF mode (focusing is performed by turning the focus ring by the photographer) by turning off the AF mode. The mode to execute the operation) is set.

If it is determined in step S4501 that the AF mode is not set and the MF mode is set, the flow advances to step S4503 to set IS.
ISZ memory request flag F for storing (storing) the focal length in Z After clearing ISZMREQ, in step S4505, an AF operation request flag F that requests an AF operation during power zoom driving Clear PZA FREQ. After this, the flow proceeds to step S1135, and the photometric I
The power supply Vdd for the C, CCD, E ² PROM and part of the peripheral control circuit is turned off. Then, the processing proceeds to step S1136, and the AF flag F If AF is cleared, ST
Returning to the processing from ART, the AF flag F If AF is standing, the process proceeds to S1165.

Here, the AF flag F If AF is set, AF and the related constant image magnification zoom process may be performed before the photometric switch SWS is turned off. Therefore, in step S1165, the constant image magnification zoom stop flag F is set. ISZSTOP is set, and in step S1167, stop of constant image magnification zoom and stop check processing (IPZENDCHECK subroutine) are executed.

Next, in step S1169, the focus flag F Clear INFOCUS, step S117
AF motor stop processing is performed in step 1, and step S11
At 73, by PZ-BSTATE command communication,
The AF drive information and the like are sent to the power zoom lens 51, and in step S1175 the AF flag F AF is cleared and it progresses to S1176.

On the other hand, if it is determined in step S4510 described above that the AF mode is set,
In step S4507, the ISZ memory request flag F is set here. ISZMREQ is cleared, and in the subsequent step S4509, the AF operation request flag F P
If it is determined that ZAFREQ has been cleared, it is a normal state where there is no memory request in ISZ and no AF operation request during power zooming, and it is determined that the power zoom power supply is off in the subsequent step S4511. If so, the above-described step S113
In step 5, the power supply Vdd of the photometric IC, CCD, E ² PROM and part of the peripheral control circuit is turned off.

However, if it is determined in step S4511 that the power zoom power supply is on, then
In step S4513, PZ-LSTATE communication is performed, and information about whether the manual power zoom is on or off is obtained from the power zoom lens 51 side. Then, in subsequent step S4515, the on / off state of the manual power zoom is determined based on the PZ-LSTATE communication result obtained in step S4513. Here, when it is determined that the manual power zoom is off, it is determined that the zoom operation ring is not rotated while the photometric switch SWS is off and the AF mode is set. In this case, the process proceeds to step S1135 described above, and the photometric IC,
Power supply V for CCD, E ² PROM and part of peripheral control circuit
Turn off dd. On the other hand, in step S4515,
When it is determined that the manual power zoom is on, it is determined that the zoom operation ring is rotated and the focal length is changed in a state where the photometric switch SWS is off and the AF mode is set. Therefore, the processing advances to step S1457, and the AF operation request flag F PZAFR
Set EQ, request AF operation, and step S11
In step 37, the power supply Vdd is turned on (a constant voltage is applied), and in the subsequent step S1138, photometry and calculation regarding exposure are performed, and the result is displayed.

That is, in the conventional case, the photometric switch SW
In the state where the AF operation is started with the ON operation of S and the photometry switch SWS is turned off, the AF operation is not started even if the zoom operation ring is rotated. Is, for example, the photometric switch S
Even if WS is turned off, the AF operation is set to start when the zoom operation ring is rotated and the focal length is changed. As a result, the photometric switch SWS
Regardless of the ON / OFF state of AF, if the zoom operation ring is rotated and the focal length is changed, the AF operation is started.

Here, in view of the design of the zoom lens, it is preferable that the in-focus position at the telephoto end and the in-focus position at the wide-angle end coincide with each other. It seems that there is no such thing. However, it is difficult to accurately match the in-focus position at the telephoto end and the in-focus position at the wide-angle end, and as a result, when the focal length is changed, the focus is out of focus. In this embodiment, as described above, if the zoom operation ring is rotated and the focal length is changed, A is set regardless of the ON / OFF state of the photometric switch SWS.
The F operation is started, and the photographer can observe the in-focus (focused) object in the viewfinder over the entire focal length even if the focal length is changed.

Further, when the photographing operation is completed and the hand is once released from the photometric switch SWS, the focus position at the time of the photographing and the focus position at the distance to the object are temporarily held. . Here, after that, when an object different from the distance to the object body photographed last time is to be observed from the viewfinder after changing the focal length (power zooming), conventionally, the distance from the photometry switch SWS is changed to the hand. As long as the focus is released, the AF operation will not be activated, and therefore the subject will be in focus during the previous shooting, that is, the subject that is about to be shot next will be out of focus. It is very inconvenient because it cannot be observed from the viewfinder. However, in this embodiment, when the zoom operation ring is rotated for power zooming, even if the finger is released from the release button and the photometric switch SWS is turned off, the AF operation is started. This means that you can perform power zooming while observing the subject from the viewfinder while always in focus, providing a very easy-to-use camera.

On the other hand, at the time of checking in step S1133 described above, if the photometric switch SWS is ON, first, in step S4519, the AF operation request flag F
After clearing PZAFREQ, step S113
I will proceed to 7. That is, when it is determined that the photometric switch SWS is turned on, the AF operation request flag F First of all, PZAFREQ will be cleared. This is because the AF operation is started regardless of the turning of the zoom operation ring, in other words, the execution of the power zooming operation, in accordance with the ON operation of the photometry switch SWS. In the AF operation (1), a precise focusing operation is set, which will be described later. on the other hand,
AF operation request flag F The AF operation associated with the setting of PZAFREQ will be described later, but the focus range is widened,
It is set to execute a relatively dull focusing operation. Therefore, in step S4519, the AF operation request flag F By clearing PZAFREQ, the precise A executed when the photometric switch SWS is turned on.
F operation is AF operation request flag F It will be set prior to the dull AF operation that accompanies the setting of PZAFREQ.

When the photometry switch SWS is off and the AF mode is set,
In step S4507 described above, the ISZ memory request flag F ISZMREQ has already been set, or AF request flag F in step S4509. PZAF
If REQ has already been set, the process proceeds to step S1137 described above.

Here, in this step S1137, the power supply Vdd is turned on (a constant voltage is applied), and the step S
At 1138, exposure metering and calculation are performed,
When the result is displayed, it is determined in the subsequent step S1139 whether or not the AF mode is set, and if it is not the AF mode, the process jumps to the above-described step S1165. If it is determined that the AF mode is set in step S1139, the in-AF flag F is determined in step S1140. AF is set, distance measurement processing, that is, integration is started in step S1143, integration data is fetched and a predetermined predictor calculation is executed, and the flow proceeds to step S1145.

If it is determined in step S1145 that the predictor calculation result is valid, step S1145 is executed.
At 4521, the AF operation request flag F PZAFR
If it is determined that the EQ is cleared, it is determined in step S1149 whether or not focus is achieved. If in focus, flag F is determined in step S4525. INF
After setting OCUS, focusing processing is performed in step S1151. Then, in step S4527, the AF request flag F After clearing PZAFREQ, the moving body process of step S1159 is executed.

On the other hand, when it is determined in step S1149 that the power is out of focus, it is determined in step S1153 whether or not the power zoom lens is attached. If it is determined that the power zoom lens is not attached ( F (When PZ = 0), the process jumps to S1176, but if it is determined that the power zoom is attached, in step S1155 the AF drive information and the like are set to PZ-B.
A STATE command is sent to the power zoom lens 51, the AF motor 39 is started in step S1157, and the process proceeds to the moving object process in step S1159.

On the other hand, in step S1145 described above, it is determined that the predictor calculation result is valid, and in step S4521, the AF operation request flag F PZAF
If it is determined that REQ is set, then step S452 is performed before the focus determination in step S1149.
In step 5, the operation of expanding the focusing range is executed. That is, in this focus range expansion operation, the permissible range of focus deviation determined to be in focus is set to be smaller than the focus range in the AF operation executed by turning on the photometry switch SWS.
In this embodiment, the change operation is set so as to double the absolute value.

That is, when the AF operation is forcibly executed even when the photometry switch SWS is turned off by rotating the zoom operation ring, the AF operation directly affects the focusing at the time of photographing. It is not intended to guarantee the in-focus state when the focal length is moved, or to guarantee the in-focus state when the photographer frames the subject in the viewfinder. However, a fine focus state is not required. On the other hand, in the focusing operation at the time of shooting, the focusing position must be finely defined, and the focusing range must be set narrow. As a result, the in-focus position may not be found at the time of shooting, but in that case, the search operation is executed and the AF motor is moved back and forth between the near position and the far position to find the in-focus position as much as possible. You have to discover it. Here, such a search operation is troublesome for the photographer, and in particular,
When the search operation is executed during zooming in a state where the shooting is not specifically intended, the annoyance is strongly recognized.

However, in this one embodiment,
As described above, before the focus determination in step S1149, the operation for expanding the focus range is executed in step S4525. Therefore, the focus determination is easily performed, and thus such a search operation may be performed. Therefore, it is possible to avoid giving the photographer a troublesome feeling.

On the other hand, if it is determined in step S1145 that the predictor calculation result is not within the effective range, for example, if the contrast of the subject is too low, the AF request flag F in step S4529.
When it is determined that PZAFREQ has been cleared, a search process for obtaining an effective value is performed in step S1147, and thereafter, the process proceeds to step S1153 described above, and it is determined whether or not the power zoom lens is attached. Here, the search process is a process for obtaining an effective defocus value by performing integration while driving the AF motor 39 toward the short distance side or the long distance side as described above.
Further, in step S4529, the AF request flag F
If PZAFREQ is set, the flow advances to step S4531 without executing search processing, and A
F request flag F After clearing PZAFREQ, jump to step S1176.

At this point, the focusing processing in step S1151 is completed, and in subsequent step S4527, the AF request flag F When PZAFREQ is cleared, or when the AF motor 39 is driven in step S1157, in step S1159, if the subject is a moving body, moving body tracking AF processing is performed. Then, in the subsequent step S1161, if the image magnification constant zoom mode is set, the image magnification constant zoom process is performed in step S1163, and thereafter, the process proceeds to the check process of the release switch SWR in step S1176.

In step S1176, it is checked whether or not the release switch SWR is turned on. If the release switch SWR is turned off, the process returns to the start as it is. Return to (S1176, S1178,
S1179).

If it is locked at the time of checking in step S1109 (when the main switch is off), the process proceeds to step S1181. When this lock is the first lock and power zoom in this routine,
In order to save the focal length data stored in the preset zoom set mode to the camera body, the process proceeds to a save process (S1183), but otherwise, the process jumps to step S1223 (S1181 and S1183).

When the lock is not first locked or when the taking lens is not the power zoom, the constant voltage supply (CONT) and the power supply (VBATT) to the taking lens are turned off, the display of the display unit 45 is turned off, and the process returns to the start. (S
1181, S1183, S1223 to S1227).

In the saving process, first, the focal length stored in the lens RAM 61b is saved to the body.
The address of the memory (RAM 61b) to be saved is designated by the ET-PZPOINT command. Next, FOC
The focal length data stored in the address specified by the ALLEN-X command is input from the lens 51, and the input focal length data is used as the focal length data in the body R.
The data is stored in the address FLM of the AM 35b (S118).
4, S1185, S1187). And the lens RAM
IMAG-LIZE data including the image magnification is input from 65b and the image magnification data is stored in the address ISM of the body RAM 35b.
Input NS-INF2 data and proceed to S1195 (S
1181-S1193). In the present embodiment, the image magnification data is transferred to the camera side in order to simplify the communication process in the save process, but both the focal length data and the lens extension amount data at the time of setting the image magnification are transferred. But it's okay.

Steps S1195 and S1197
Then, based on the data input by LENS-INF2, it is checked whether the power zoom can be stored or the power zoom. When the power zoom cannot be stored or when the power zoom is not performed, the process directly proceeds to CONT1, and the power zoom can be stored and the power zoom (RETPZ = 1, PZD =
In the case of 1), the body side requests the battery to perform a battery check, and when the battery is normal, the power zoom lens 51 transmits a command (RETRACT-PZ) for performing the power zoom storage process, and the automatic (control) Flag F indicating that zoom driving is in progress IP
Set ZON, start NG timer, CONT
The process proceeds to step 1 (S1195 to S1209). As described above, the preset zoom is also a kind of auto (control) zoom, so if the preset mode is selected, this flag F Setting IPZON indicates that preset driving is in progress.

If the battery is abnormal in the battery check, the process proceeds to CONT1 processing (S1203).
The flag F RETPZ is information unique to the lens,
If the zoom lens does not require the storage of the zoom lens due to the inner zoom, etc., it is cleared and the storage process is not performed.

In the CONT1 process, it is determined whether the power zoom lens 51 can store the AF or the AF mode by LENS-INF.
AF storage flag F input by 2 Check with RETAF etc., if AF can be stored and it is in AF mode,
The focusing lens 53F is driven by driving the AF motor 39.
Back to the storage position (fur end) (S1211-S121
5). Then, if the control power zoom is in progress, the control power zoom is checked while waiting, and when it is finished, the constant voltage supply and the power supply to the photographing lens are turned off, and the display on the display unit 45 is turned off to start. Return to (S1
217-S1227). If the AF cannot be stored or the AF mode is not set, the lens storing process is skipped. In addition,
Flag F RETAF is lens-specific information, which is cleared when the zoom lens does not need to store the focusing lens due to inner focus or the like, and the storage processing is not performed.

[PZ, AF-INIT processing] Body 11
Initialization of the power zoom lens 51 controlled by the side (S1
105) Regarding the processing, the PZI shown in FIGS.
Description will be made with reference to the NIT subroutine. This process
In this processing, the power zoom lens 51 is caused to initialize the zooming lens group 53Z and the focusing lens 53F group, and the information saved in the body 11 when the main switch is turned off is returned to the lens 51. That is, the former is a process for detecting the position of the zoom lens and the position of the AF lens, and the latter is the image magnification of ISZ saved in the body RAM 35b when the main switch is off (locked) and the focus for preset zoom. This is a process in which the distance is returned to the lens 51 (lens RAM 65b) again to make a note.

When entering this process for the first time, the new communication flag NEWCOM indicating the end of the old communication has been cleared, and therefore the old communication for performing the data communication with the lens ROM in synchronization with the clock of the camera body 11 is performed. After that, the communication with the lens CPU 61 is switched to new communication for performing data communication in synchronization with the clock of the lens CPU 61 (S1301 and S1303).

If the attached photographic lens is not the KZ lens (including the power zoom lens 51 of this embodiment) equipped with the lens CPU, new communication is not possible, and the process returns. New communication L
Data is input by the ENS-INF2 (14) to check whether it is a power zoom lens (PZ lens) (S1305, S1309). If it is not a PZ lens,
Flag F for identifying a PZ lens Clear PZ and proceed to step S1323 (S1309, S13
11).

If it is a PZ lens, flag F When PZ is set up and comes from reset (batteries are replaced),
Alternatively, when the lens is mounted for the first time, the initial value is stored in the image magnification (image size) memory ISZ (S1313, S1315, S1319). In other cases, by SORE-PZF (28) communication, S118
The information of the focal length for preset zoom etc. saved in the address FML of the body RAM 35b in 5 is stored in a predetermined address (FCL0L, H to FCL7L, H) of the lens RAM 61b of the lens CPU 61 (S1315, S1317). ). And STOR
E-IS (29) communication is performed and RAM of body CPU
The image magnification saved in (35b) or the image magnification of the initial value set in S1319 is used as the RAM (6) of the lens CPU.
1b) is stored in a predetermined address (ISZ-IMGL, H) and a new communication flag is set (S1321, S).
1323).

Next, data is input from the lens CPU 61 by POFF-STATE (11) communication (S13).
25). Is the flag F_PZINIT indicating that the initialization of the power zoom is completed,
If the flag F_PZ indicating the power zoom is cleared, the standby process is performed in step S136.
Fly to 1 (S1327, S1329).

Flag F If PZINIT is cleared and the flag F_PZ is set, the power zoom is not performed (flag F When PZD (bit 5 of POFF-STATE data is cleared), that is, during manual zooming, AF initialization (AFINI
T) Proceed to processing (S1325-S1331). In the power zoom mode, the flag F_BBATREQ is set by the body to turn on the PZ, and BATON is set.
In the OFF subroutine, the power of the PZ is turned on to supply the power to the power zoom lens 51, and it is checked whether the power is normally supplied (S1131 to S113).
7). If the battery power is not output normally (when flag F_BATNG = 1), AFI is used as it is.
Proceed to NIT processing, and if normal (F_BATNG = 0), output the PZ-INITPOS command (32),
A flag F_PZINIT indicating that the initialization of the PZ is completed by causing the taking lens to perform the PZ initialization operation
Stands up and proceeds to the AFINIT processing (S1337 to S13).
41). The flag F BATNG is step S14
17, flag F When it is determined that BDET is set, it is set to be cleared in step S4093.

[AFINIT processing] AF shown in FIG.
The INIT processing flowchart is processing for performing initialization regarding AF under the control of the body 11 side. In the present embodiment, AF initialization is performed after PZ initialization, but it may be reversed.

In the AFINIT processing, the taking lens is set to the AF
Focusing lens 53 on condition that the mode is set.
F is moved to the storage position, that is, the position where the lens barrel length is the shortest (S1341, S1343). In the present embodiment, the position is at infinity. Then, the power zoom lens 51 is caused to execute the initialization operation by AFINITPOS communication, and the flag F flag F_AFINIT indicating that the initialization processing of the AF operation is completed on the power zoom lens 51 side is set (S1345, S1347). Further, in this initialization, the lens CPU 61 initializes the lens RAM 61b for counting AF pulses.

Next, if the flag F_IPZON indicating the power zoom other than the manual power zoom is set, it is determined whether or not the initialization of the power zoom is completed.
Check with the ENDCHECK subroutine (S13
49-S1353). After the initialization of the power zoom is completed, a flag F_PZINIT for identifying that the power zoom has been initialized is set, and the battery request flag F on the body side is set. BBATREQ is cleared, and battery power supply stop and stop check are performed in the BATONOFF subroutine (S1355-S1359).

The photometric IC 17 and CC of the body 11
Power of D21, E ² PROM 43, etc. is turned on (Vdd O
N), it returns as it is, and if it is off, S
Send the TANDBY command to put the lens CPU 61 of the taking lens 51 in standby (shift to low power consumption mode)
After that, the process returns (S1361, S1363).

[BATONOFF Processing] In the BATONOFF flowchart shown in FIG. 59, when the power request (battery request) is issued from the body or the lens, the power for the zoom motor 65 is supplied from the camera body 11 to the power zoom lens 51. Main CPU to check whether the supply is normally done
This is a check process by 35. In this embodiment, the battery request may be issued by the camera body 11 itself or by the taking lens 51.

In the BATONOFF processing, first, when there is no battery request from either the power zoom lens 51 or the camera body 11, when power is not already supplied to the terminal VBATT (when the flag F_BATON is cleared). Returns as is (S14
01, S1403, S1405), when power is supplied to the terminal VBATT, the power zoom lens 51
The power supply to (terminal VBATT) is turned off, and the flag F_
Data indicating that the power supply has been turned off by clearing BATON and outputting the BODY-STATE0 command (b
VBATT = 1 of it5 is sent to the lens and then the process returns (S1421 to S1425).

When there is a battery request from the power zoom lens 51 or the camera body 11 (POFF-ST
When LBATREQ of bit1 of ATE data is set or when BBATREQ is set), if power is not yet supplied, power is supplied to the power zoom lens 51, and BODY-STATE0 data relating to the body state. Is sent to the lens to indicate that power is being supplied (bit 5 BBAT is set), a flag F_BATON for identifying that power is being supplied is set, and then POFF-STAT is set.
Although the E data is received, the POFF-STATE data is received as it is when the power is already supplied (S1407 to S1415).

Then, the battery supply is normal (POFF-
If STATE bit 0 flag F_BDET = 1), then flag F It returns after clearing BATNG (S4903, S1417). However, when the power supply is abnormal, for example, when it is short-circuited with the GND line, a flag F_BATNG for identifying that the battery is abnormal is set, the power supply to the power zoom lens 51 is stopped, and the flag F_BATON is stopped. Clear,
A BODY-STATE0 command is output, power supply stop data is sent to the lens 51, and the process returns (S141).
9-S1425).

[PZ-LOOP Processing] FIGS. 60A and 60
The PZ-LOOP processing shown in B and FIG. 61A is processing relating to the power zoom performed by the main CPU 35. In this PZ-LOOP processing, as power zoom-related operations, a preset zoom (clip) (PSZ) operation for power zooming to a preset focal length, a focal length setting operation (PSZS), a constant image magnification zoom operation (ISZ), etc. Will be done.

In this embodiment, as will be described in detail later, when the preset zoom (PSZ) mode is set, when the zoom set button 77 (that is, the PZ mode switch SL) is pressed, the photometric switch is pressed. The AF operation is started regardless of the ON / OFF state of the SWS, and the power zoom is set up to the preset focal length. As a result, the photographer can observe the subject image whose power is zoomed to the preset focal length with the viewfinder in focus.

Also, a preset zoom set (PSZ
In the state in which the S) mode is set, when the zoom set button 77 is pressed, the zoom operation ring 78 is turned to set the present focal length which is arbitrarily set. Note that when the preset zoom set (PSZS) mode is set, the AF operation is not activated in response to the pressing of the zoom set button 77, but the photometric switch SWS already described with reference to FIG. 53A.
AF with the rotation of the zoom operation ring 78 in the off state of
The operation will be activated. As a result, when changing the focal length in the preset zoom set (PSZS),
The photographer can frame the subject while observing it with the viewfinder.

When the constant image magnification zoom (ISZ) mode is set, the zoom set button 77
ISZ memory request flag F when is pressed ISZM
The AF operation is activated as REQ is set, and the image magnification at that time is set to be stored from the distance to the subject at the time of focusing and the focal length at that time.

When entering this PZ-LOOP processing, first,
Flag F in step S1501 It is judged whether NEWCOM is set or not, and if it is cleared, that is, if new communication is impossible, the process returns without executing any control procedure. On the other hand, step S1051
At flag F It is determined that NEWCOM is set, and in step 1503, flag F is set.
When it is determined that PZ is set, that is, on condition that the new communication and power zoom are possible, the process proceeds to step S1505, and each process described below is executed.

In step 1503, flag F is set.
When PZ is cleared and it is determined that new communication is possible and power zoom is not possible, the process proceeds to step S1504-1, and BODY-STATE0 communication is performed. This BOD
In Y-STATE0 communication, body side information such as power zoom mode information is sent to the lens, and if it is determined that Vdd is on in the subsequent step S1504-2, in step S1504-3, POFF-
The lens information such as the switch state on the lens side is input by STATE communication. On the other hand, if it is determined that Vdd is off, then POFF is set in step S1504-4.
Enter lens information by S-WSLEEEP communication, and
Set the lens CPU 61 to the standby mode (low power consumption mode).
Do)). By this POFFS-WSLEEEP command, the lens CPU 61 remains in the low power consumption mode until the next communication command is received. In this way, step S1504-3 or step S150
After executing 4-4, the control procedure returns.

Here, in step SS1505 described above, the POFF-STATE from the power zoom lens 51.
In step S1507, the data of the lens switch or the like is input, and in the subsequent step S1507, the PZ mode is switched and the display is corrected according to the data.
At 09, power is supplied or stopped. After this,
In step S4601, BODY-STATE0 communication is performed. In this BODY-STATE0 communication, body side information such as power zoom mode information is sent to the lens, and if it is determined that Vdd is on in the subsequent step S4603, in step S4605, POFF-STATE is set. Input lens information such as the switch status on the lens side through communication. On the other hand, if it is determined that Vdd is off, the lens information is input by POFFS-WSLEEEP communication in step S4607, and the lens CPU 61 is switched to the standby mode (low power consumption mode). Let This POFFS-WSL
The EEP command causes the lens CPU 61 to maintain the low power consumption mode until the next communication command is received. In this way, step S4605 or step S
After executing step 4607, the control procedure from step S1513 is executed to perform the following processing based on the input data.

First, in step S1513, preset zoom (PSZ) mode (that is, clip mode).
If it is determined that the PSZ mode is set, in step S4701, the ISZ memory request flag F is set as a part of so-called initialization processing. ISZ
MREQ is cleared to prohibit the memory operation, and in the subsequent step S1515, the flag F_ISZSTOP is set.
Is set to prohibit the constant image magnification zoom operation, and in step S1517, the IPZENDCHECK subroutine is executed to end the constant image magnification zoom. After that, in step S1519, it is determined whether or not the zoom set button 77 attached to the side portion of the power zoom lens 51 has been pressed, that is, whether or not the preset zoom drive has started. Specifically, the edge where the zoom set button 77 rises from the off state to the on state is detected, that is, the moment when the zoom set button 77 is pressed is detected.

If the preset zoom drive is not started (the zoom set button 77 is pressed down), the flag F is temporarily set in step S4703. IPZON
Judge whether is set, and if it is cleared,
That is, when it is determined that the preset zoom drive is not being performed, the control procedure is returned. As a result, if the in-focus determination has already been made in step S1149 described above, the AF request flag F in step S4527. P
Since ZAFREQ is cleared and the AF operation is stopped, if the focus determination is made at the time when the preset zoom (clip) operation is completed, this A
The F stop condition will be maintained.

On the other hand, flag F in step S4703. When IPZON is set, that is, when the zoom set button 77 is already pressed and it is determined that the preset zoom is currently being driven, if the control procedure is directly returned, even once. Since the AF operation is stopped when the in-focus determination is made, the AF request flag F is set in step S4705. PZAF
After setting REQ and continuing the AF operation, the control procedure is returned. That is, in this way, step S470
Since the continuation of the AF operation is forcibly performed in step 5, the AF operation continues as long as the preset zoom (clip) operation is executed even if the focus state is lost during the preset zoom (clip) operation. do it,
Certainly, the in-focus state will be achieved.

On the other hand, if it is determined in step S1519 that the preset zoom drive has started, then in step S4707 the AF request flag F PZAF
Set REQ to activate AF operation. That is, in this embodiment, the AF operation is started immediately after the zoom set button 77 is pressed whether or not the preset zoom (clip) operation is actually started. As a result, according to this embodiment, the AF operation is started from the time point when the start of the preset zoom (clip) operation is instructed by pressing the zoom set button 77, and during the preset zoom (clip) operation. , The in-focus state will always be achieved.

After the AF operation is activated in this way, in step S1521, the preset zoom (clip) drive is currently in progress (F If it is determined that IPZON = 1), and it is determined that the preset zoom (clip) is being driven, in step S1555, I
In the PZEND check subroutine, a process for checking whether or not the preset zoom is finished is executed, and after this check process is finished, the control procedure is returned.

If it is determined in step S1521 above that the preset zoom (clip) operation has not yet started, then in step S1523 the camera body 11 itself requests power supply, and in subsequent step S1525. Supply power.
Then, in step S1527, it is determined whether the battery is abnormal, and if it is determined that the battery is abnormal, the control procedure is directly returned. If it is determined that the battery is normal, in step S1529, the MOV is determined.
The E-PZND command is transmitted to cause the power zoom to the focal length position stored in the designated address, and in the subsequent step S1531, a flag F_IPZON for identifying that the preset zoom is being performed is set and the process returns.

On the other hand, in step S1513 described above, when it is determined that the preset zoom (PSZ) mode is not set, the flow proceeds to step S1541 and the preset zoom set (PSZS) mode (that is, clip set mode). It is determined whether or not is set. Here, the preset zoom set (PSZ
If it is determined to be the S) mode, step S4
709, the ISZ memory request flag F ISZMR
After clearing the EQ, in step S1543, a flag (F that stops constant image magnification control and automatic zoom (preset zoom as)) ISZSTO
P, F IPZSTOP) and set step S15
At 45, the driving of the preset zoom or the constant image magnification zoom is stopped by the IPZENDCHECK subroutine.

Then, in step S1547, similarly to step S1519 described above, it is determined whether or not the zoom set button 77 has been pressed and whether or not a preset zoom set has been instructed. If it is determined that the zoom set button 77 has been pressed, step S1
In step 549, the STORE-PZP command is transmitted to the power zoom lens 51 to cause the lens CPU 61 to store the current focal length data in the specified address of the lens RAM 61b, and the subsequent step S1551.
In, the preset zoom set (PSZS) mode is changed to the preset zoom (PSZ) mode. That is, once the current focal length data is stored, the preset zoom (clip) mode is automatically switched to change. Thereafter, in step S1553, bit 0 in the BODY-STATE0 command is
The value of 2 is changed, the BODY-STATE0 command is output to notify the power zoom lens 51 that the preset zoom mode has been changed, and the control procedure is returned. On the other hand, in step S1547 described above,
When it is determined that the zoom set button 77 is not pressed, the control procedure is returned without doing anything. That is,
The preset zoom set mode (clip set mode) will continue to be set.

On the other hand, if it is determined NO at step S1541 described above, that is, if it is determined that neither the preset zoom mode (clip mode) nor the preset zoom set mode (clip set mode) is determined. In step S1561, it is determined whether the constant image magnification zoom mode (ISZ) is set. If it is determined that ISZ is set, then in step S1563 the flag F is set. IPZSTOP is set to stop the preset zoom, and in subsequent step S1565, IPZE
Run the NDCHECK subroutine to check that the preset zoom is finished.

After this, in step S1569 LE
NS-INF1 data is input, and in step S1571, it is determined whether or not the power zoom switch PZSW is turned on by rotating the zoom operation ring 78 to change the focal length. Here, if it is determined that the power zoom switch PZSW is on, that is, if the focal length is currently being changed, the focal length cannot be stored, so the flow advances to step S4711, and here , ISZ memory request flag F ISZMREQ is cleared, and in a succeeding step S4713, a flag F for prohibiting the constant image magnification zoom ISZ Set PZWAIT and return the control procedure.

On the other hand, if it is determined in step S1571 that the power zoom switch has been turned off, that is, the zoom operation ring 78 has not been rotated and the zooming operation has ended, or that the zooming operation has not been completed yet. If it is determined that the zoom set button 77 has not been activated, the process advances to step S4715 to determine whether the zoom set button 77 has been pressed, as in step S1519 described above. If it is determined in step S4715 that the zoom set button 77 has been pressed, the flow advances to step S4717 to set the ISZ memory request flag F. IS
ZMREQ is set, and in a succeeding step S4719, it is determined whether or not focus is achieved. Only when the subject is in focus, the process proceeds to step S4721, and the ISZ-MEMORY command for storing the image magnification at that time is output to the taking lens. After this, step S472
3, the ISZ memory request flag F ISZMRE
Q is cleared, and in step S4725, a flag F_PZWAI for prohibiting the start of the constant image magnification zoom ISZ.
After clearing T, that is, permitting the constant image magnification zoom operation ISZ, a control procedure is established and the process returns.

If it is determined in step S4719 described above that the subject is not in focus, the process advances to step S4713 described above to perform the constant image magnification zoom ISZ.
Flag F to prohibit Set PZWAIT and return the control procedure.

On the other hand, if it is determined NO at step S4715 described above, that is, if it is determined that the pressing operation of the zoom set button 77 is not detected and the zoom operation ring 78 is not rotated, either. Proceeds to step S4727, and ISZ memory request flag F
Determine if ISZMREQ is set.
In this step S4727, the ISZ memory request flag F When it is determined that ISZMREQ is set, that is, when the zoom set button 77 is already pressed, the ISZ memory request flag F is already set in step S4717 described above. If it is determined that ISZMREQ is set, step S4719.
In this case, since it is the case where the in-focus determination is not made in step S4719, the in-focus reversal is executed again.
Proceed to.

Also, in this step S4727,
ISZ memory request flag F If it is determined that ISZMREQ has been cleared, then in step S4723 the ISZ memory request flag F is determined after focus determination. ISZ
Since MREQ has already been cleared, the flow proceeds to step S4725 described above, the flag F_PZWAIT for prohibiting the start of the constant image magnification zoom is cleared, the start of the constant image magnification zoom is permitted, and the control procedure is returned. To do.

Here, in the above-mentioned step S1561, if it is determined to be NO, that is, it is determined that the zoom mode is not the preset zoom (clip) mode, the preset zoom set (clip set) mode, or the constant image magnification zoom mode. In this case, in step S4729 the ISZ memory request flag F ISZMREQ is cleared, and in subsequent step S1585, flag F is set. IPZSTOP and flag F ISZSTOP is set together to stop the preset zoom and the constant image magnification zoom, and finally, in step S1587,
The IPZENDCHECK subroutine is executed to check that the preset zoom is completed, and the control procedure is returned.

Here, in the above-described embodiment, in the constant image magnification zoom (ISZ) mode, the distance to the subject at the time of focusing and the focal length at that time are determined according to the pressing operation of the zoom set button 77. Therefore, the image magnification at that time is stored, but the present invention is not limited to such a control procedure, and may be configured as a modification shown in FIG. 61B. That is, in the modification shown in FIG. 61B, only step S4715 in the embodiment shown in FIG. 61A is replaced with step S4801, and the other steps are configured to be executed in the same manner as in FIG. 61A. There is. Therefore, in the description of the modification shown in FIG. 61B, the same steps as those of the embodiment shown in FIG. 61A are designated by the same reference numerals, and the description thereof will be omitted.

That is, in step S4801, detection of the off edge of the power zoom switch (edge when the on state changes to the off state) is set as a starting condition for storing the image magnification. There is. In other words, only when the off-edge of the power zoom switch is detected, the distance to the subject at the time of focusing and the focal length at that time are measured, and the image magnification at that time is stored. . Specifically, the power zoom switch is accompanied by a return operation to the neutral position of the zoom operation ring 78,
Since it is configured to be turned off from the on state, when the photographer rotates the zoom operation ring 78 to set a desired focal length (at this point, the zoom operation ring 78 is rotated, AF operation has started), remove your hand from the zoom operation ring 78,
When the power zoom switch returns to the neutral position by the urging force of the built-in spring (not shown), the power zoom switch changes from the on state to the off state, and the off edge is detected. By turning off the power zoom switch in this way, the control procedure from step S4717 is executed,
The distance to the subject at the time of focusing and the focal length at that time are measured, and the image magnification at that time is stored.

As described above, in the present invention, in the constant image magnification zoom (ISZ) mode, the image magnification may be memorized on the basis of the apparent operation of the photographer pressing the zoom set button 77. Alternatively, the image magnification may be stored based on the operation of releasing the zoom operation ring 78 after setting the focal length to a desired value.

[IPZENDCHECK Processing] In the IPZendcheck flowchart shown in FIG. 62, preset power zoom and constant image magnification zoom processing are terminated,
Alternatively, this is a process on the body 11 side for checking the end thereof.

When this IPZENDCHECK subroutine is entered, when the constant image magnification zoom stop and the constant image magnification zoom operation are in progress (F ISZSTOP = 1, F ISZ
ON = 1), or when preset zoom stop and preset zoom operation are in progress (F IPZSTOP = 1,
F IPZON = 1), the flag F NGTIMER
And flag F Clear IPZEND respectively, send IPZ-STOP command to stop power zoom, and set each flag F ISZON, F IPZON, F B
After BATREQ is cleared, the battery supply is stopped and checked, and then the process returns (S1601 to S160).
7, S1623 to S1631).

When neither the constant image magnification zoom nor the preset zoom is being performed, the PZ-LSTATE data is input, and it is checked whether the power zoom lens 51 is performing the preset zoom or the constant image magnification zooming. If not (when IPZB = 0), preset zoom or constant image magnification zoom end flag F Set IPZEND and return (S
1601 to S1617). During preset zoom or constant image magnification zoom (when IPZB = 1),
If the abnormality detection timer (NG timer) has not timed up, the process returns (S1619).

When the NG (abnormality detection) timer expires before the constant image magnification zoom is completed, it is considered that there was some abnormality, so the TIMEUP flag is set (F TIMEUP = 1), clear NGTIMER flag and IPZEND flag (F NITI
MER = 0, F IPZEND = 0) (S1622)
-1, S1622-2). Then, power zoom stop processing is performed (S1623 to S1631). The flag F
IPZEND is a flag indicating that the auto zoom (that is, zoom other than the manual power zoom) has ended. Then, when the NG timer has not timed out, the process directly returns.

[ISZ-DRIVE1 Processing] The flowchart (ISZ-DRIVE1) shown in FIGS. 63 to 66.
1) is a power zoom lens 51 (lens CPU 61)
Body CPU 31 for controlling the constant image magnification zoom process
Processing. The ISZ-DRIVE processing is shown in FIG.
3 is called in S1163.

If the focusing lens 53F is at the infinity position, the AF-INITPOS command is used to send data concerning the AF initial position to the power zoom lens 51 (S
1701, S1703), if there is a close range position, PZ-
The PZ body state data regarding the power zoom mode on the camera body 11 side is transmitted to the power zoom lens 51 by the BSTATE command (S1701, S170
5, S1707).

Flag F for prohibiting start of constant image magnification zoom If PZWAIT is set, or
When the predictor calculation result is invalid, the process returns without doing anything (S1709, S1711). If it is not the power zoom weight and the predictor calculation result is valid, it is checked whether or not it is in focus (S
1709-S1713). When in focus, is the NG timer already activated? NI
Check TIMER = 1) and if not activated, start NG timer and flag F NITIME
Set R and proceed to S1721 (S1713, S17
15, S1719, S1720). If the NG timer has already been started, skip the above processing and execute S17.
Proceed to 21.

Next, after completion of the image magnification constant zoom end check (IPZEND-CHECK) processing in S1721, if the image magnification constant zoom drive is in progress, the completion check is performed (S1723, S1725). If the constant image magnification zoom drive is in progress (F_ISZON = 1) and the constant image magnification zoom has ended (IPZEND = 1), the flag IPZEND is cleared, the flag ISZSTOP is set, and IPZEN is set.
In the D-CHECK subroutine, the process of stopping the constant image magnification zoom is performed, and then the process returns (S1725-S1).
729).

If the constant image magnification zoom is not in progress or if the constant image magnification zoom has not ended, data relating to the power zoom state of the camera body 11 is transmitted by the PZ-BSTATE command (S1723, S1725, S173).
1). If the constant image magnification zoom is not in progress, the body side requests power supply to perform battery supply check processing, and a flag F for identifying that the constant image magnification zoom is being performed.
After _ISZON is set up, the focus determination is performed, but if the image magnification constant zoom is already in progress, the focus determination is directly performed (S
1733-1741).

If in focus, in order to execute a constant image magnification zoom based on the current AF pulse number (lens extension amount), predetermined data is transmitted to the power zoom lens 51 by the BODY-STATE1 command, Further ISZ
-Send the START command to power zoom lens 5
The constant image magnification zoom is started to 1 and then the process returns (S1741 to S1745). If it is out of focus, the data of the defocus pulse measured by the camera body 11 is transmitted by the STORE-DEF & D command, and the data for performing the constant image magnification zoom based on the defocus pulse is transmitted by the BODY-STATE1 command. Send,
The ISZ-START command is transmitted and the process returns (S1741, S1747 to S1751).

The lens CPU 61 which has received the above commands and data calculates the target focal length through the ISZ processing of FIG. 15 and executes zooming control.

[ISZ-DRIVE2] A second embodiment of the constant image magnification zoom processing shown in FIGS. 65 and 66 will be described. The second embodiment is characterized in that the camera body 11 performs calculation and control relating to a constant image magnification zoom.

The processing of steps S1801 to S1823 is the same as that of steps S1701 to S17 of the first embodiment shown in FIG.
Since it is similar to 31, the description up to that is omitted and S18
The processing after 25 will be described. When not in focus, data regarding the power zoom state of the camera body 11 is transmitted by the PZ-BSTATE command (S18).
13, S1825-S1833). If the power zoom lens 51 is not zooming at a constant image magnification, the body side makes a power request to perform battery supply and check, and the control zoom flag F is displayed. IPZON is set (S1827 to S1833).

Next, the address of the lens RAM 61b in which the focal length at the time of image magnification memory is stored is specified and S is designated.
The ET-PZPOINT command is transmitted, and the focal length (FOCALLEN-) at the time of image magnification memory specified by the SET-PZPOINT command is transmitted from the power zoom lens 51.
X data) is input (S1835, S1837). Further, the focal length data at the time of the image magnification memory stored in the lens RAM 61b is designated to specify SET-AFPOI.
The NT command is transmitted, and the number of AF pulses (LENS-AFPULSE data) at the time of image magnification memory is input from the lens 51 (S1839, S1841). Then, the image magnification (x ₀ f ₀ ) is calculated based on the input data (S
1843). Further, by specifying the current AF pulse value, S
The ET-AFPOINT command is transmitted, and the current AF pulse number (LENS-
Input AFPULSE data) (S1845, S1)
847).

Next, it is checked whether or not the subject is in focus, and if the subject is in focus, the focal length is obtained by an equation using the current AF pulse number x. If it is a moving object, the focal length is calculated based on the current AF pulse as in the case of focusing, and if it is not a moving object, an expression using the current AF pulse number x and the defocus pulse Δx The target focal length is obtained by (S1849 to S1853). Then, the command for performing power zoom to the calculated target focal length and the focal length data (MOVE-PZF command) are transmitted, and then the process returns (S1855). This MOVE-
The lens CPU 61 that has received the PZF command drives the zooming lens 53F to the target focal length sent from the camera body 11.

In the above embodiment, the calculation method of the target focal length is changed according to the focusing state of the photographing lens, but of course, other conditions such as the moving object prediction A
The configuration may be changed based on whether it is F or not.
In this case, before S1853, a determination process “whether the subject is a moving body? The focal length may be calculated. Here, the reason for calculating the target focal length without using the defocus amount during the moving object prediction AF is to speed up and stabilize the lens drive.

[ISZ-DRIVE3] The constant image magnification zoom processing shown in FIGS. 67 and 68 is a modification of the constant image magnification zoom controlled on the body 11 side. Even if it is performed, there is a possibility that it will be out of focus at the end of zooming, so AF processing and constant image magnification zooming are performed again after constant image magnification zooming. In addition, this embodiment also includes
A method of driving by changing the speed of the constant image magnification zoom according to the moving speed of the moving body during the moving body prediction AF is also shown.

If the focusing lens group 53F is at the infinity position, the AF-INITPOS command is transmitted to the power zoom lens 51 (S1901, S1903),
If the camera is at the closest position, use the PZ-BSTATE command to set the PZ for the power zoom mode on the camera body 11 side.
The body state data is transmitted to the power zoom lens 51 (S1901, S1905, S1907). When the power zoom weight is used, or when the predictor calculation result is invalid, the process returns without doing anything (S190).
9, S1911).

If the power zoom weight is not used and the predictor calculation result is valid, it is checked whether or not the subject is a moving body (S1909 to S1913). When the object is a moving object and the constant image magnification zooming flag is down (when the constant image magnification zoom drive is not in progress), the battery request flag of the body is set (F BATREQ =
1) Then, the battery is supplied and the constant image magnification zooming flag (F Set ISZON = 1) (S196
1 to S1967). Then, the power zoom speed according to the moving speed of the moving object (moving speed of the image plane) is set, and the speed data of the set power zoom (ISS
PA, ISS PB) and IS at the current position AF pulse
Flag F to perform Z control Clear ISZD and send by BODY-STATE1 data communication, I
An SZ-START command is transmitted to cause the taking lens 51 to start zooming with a constant image magnification (S1969 to S197).
3). Here, flag F ISZD is a control flag for constant image magnification zoom (ISZ). When set, it indicates that the target focal length obtained by using the defocus pulse is used for control. It is set to indicate that the target focal length is calculated using the current value.

If it is not a moving object, the second focus (F INF
OCUS = 2) or the first time (F INFOCUS = 1)
It is checked whether or not (S1913, S1915, S
1917). In addition, F INFOCUS is 2 bits
It If it is neither the second time nor the first time of focusing, that is, the first
Sometimes, check whether it is in focus and focus
If not, it returns.
Battery request flag F Set BBATREQ to supply power
Flag F during power supply and constant image magnification zoom ISZON
Is set (S1919 to S1925).

Then, the constant image magnification zoom start command is transmitted to start the constant image magnification zoom, start the NG timer, check the end of the constant image magnification zoom, and set the first focusing flag when completed.
The constant image magnification zoom end flag F_IPZEND is cleared and the first processing is ended (S1935-S194).
0).

[0275] When this processing is entered next time, since the flag for the first focusing is set, the processing proceeds from S1917 to S1941 and it is checked whether or not focusing is performed. If the subject is not in focus, the process returns and the above process is repeated until the subject is in focus. If in focus, start the NG timer,
A constant image magnification constant zoom start command is transmitted to the photographing lens to start the constant magnification of the image lens, the second focus flag is set, and the process returns (S1943).
~ S1947).

This IS after the processing of S1947 is completed.
When the Z-DRIVE3 process is started, the second focus flag is set, and therefore the process goes from S1915 to S1951 to check the end of the constant image magnification (control) zoom. If the control zoom has not ended, the process returns, and if it has ended, the control zoom end flag F_IPZEND is cleared, and the image magnification constant zoom stop flag ISZSTO.
P is set up, a constant image magnification zooming process is performed, and then the process returns (S1953 to S1957).

"AFP-CNT processing" A shown in FIG.
The FP-CNT process is an AF pulse count process in the power zoom lens 51. The lens CPU 61 is
An AF pulse counter that counts the AF pulses output by the AF pulser 59 in a hardware manner is provided. This AF
P-CNT processing is entered at 2-ms intervals by 2-ms timer interrupt. This process is a detail of the S303 process of the 2 ms timer interrupt routine shown in FIG.

In the AFP-CNT processing, first, the count value of the AF pulse hard counter is stored in the AF pulse count value memory (address AFPCCNTL of the lens RAM 61b,
H) is stored (S2001). And PZ-BS
Data relating to autofocus control input by the TATE command (predetermined address P of the lens RAM 61b
When the AF motor 39 is near moving and has not reached the near end, the AF pulse count start value (AFSTRTRL, H) is added with the AF pulse count value by referring to the data from bit3 to bit0 of Z_BDST). The current AF pulse value memory (lens RA
The memory is stored in AFPXL, H of M61b and this routine is exited, but when the near end is reached, the process ends as it is (S2002 to S2007).

When the AF motor 39 is in the firmware but has not reached the far end, the AF pulse count value is subtracted from the AF pulse count start value and stored in the current AF pulse value memory (AFPXL, H). A
Exit the FP-CNT process, and if the far end is reached, exit the AFP-CNT process as it is (S2009-
S2013). If neither near move nor firm move, the AF motor 39 is not rotating, so the AFP-CNT process is ended without doing anything (S200).
2, S2009).

"AFP-ADJ processing" A shown in FIG.
The FP-ADJ flowchart is for taking lens 5 that corrects the current AF pulse value due to backlash or the like.
This is processing on the side of 1. In this embodiment, A at the fur end
The F pulse value is set to 0, and the near end AF pulse value is set to the maximum value. Then, each time the brush 85 passes through the index 83 of the distance code plate 81, the current AF pulse count value is corrected based on the absolute AF pulse number (reference AF pulse number) based on the absolute value code at the index 83 position. It is a composition. This process is a detail of S307 of the 2 ms timer interrupt routine shown in FIG.

When the AFP-ADJ processing is started, it is first checked whether or not the brush 85 has come into contact with the index 83, and if not, the processing is ended as it is (S202).
1). Even if they are in contact with each other, if they are in contact with each other in the previous processing, the process directly returns (S2021, S202).
3). That is, the time when the index 83 and the brush 85 contact each other (the edge of the index 83) is detected.

When the index 83 and the brush 85 come into contact with each other, A
When the F motor 39 is in contact with the firmware at the time of the firmware, the AF pulse FAR table data (data of the NEAR end side edge of the index 83) corresponding to the near end position of the index 83 is read and is set to the address AFPCDL, H. When memory is memorized and contact is made by near move, the index 83
AF pulse NEAR table data (edge data on the FAR end side of the index 83) corresponding to the far end position of No. 2 is read and stored in the address AFPCDL, H (S
2025-S2033). The index 83 has two types of tables, a FAR table and a NEAR table.
Since there is a width in, the absolute position at the time of contact differs depending on the contact direction. Further, when the AF motor 39 is stopped, the process directly ends (S2).
027, S2031). The flag F_ of S2025
AFPADJ is an AF pulse correction inhibition flag, which is normally cleared.

Next, when the current AF pulse value is known (when the flag F_AFPOS is set),
The current AF pulse count value (AFPXL, H data) is subtracted from the table data (AFPCDL, H),
The subtracted value (difference) is stored in the AF pulse error memory (AFPDI
FXL, H) (S2035, S203)
7). Here, when the error is negative (when there is borrow), the absolute value of the error is stored in the AF pulse current value memory (S2039, S2041).

Then, the above difference is equal to a predetermined tolerance (N A
FPDIF) is checked, and if it is smaller, the processing is ended as it is, but if it is larger, correction, that is, the current AF pulse value memory (AFPX) is performed.
L, H) and the AF pulse count start value memory (AFFPTRTL, H) with table data (AFPC).
DL, H) are inserted (S2043, S2045). On the other hand, when the current value of the AF pulse is unknown, the correction process of S2045 is unconditionally executed (S203).
5, S2045).

Then, the AF pulse hard counter is cleared and started, the AF pulse count start value (AFPCNTL, H) is cleared, the flag F_AFPOS indicating that the current AF pulse value is known is set, and the process is terminated ( S2047, S2049).

"LMT-DTC Processing" L shown in FIG.
The MT-DTC flowchart is for the zooming lens group 5
This is processing on the side of the taking lens 51, which detects that 3Z has reached the end point or cannot move due to some circumstances (called a pseudo end point). In this embodiment, it is detected by checking whether or not the PZ pulse is output within a predetermined time while the PZ motor 65 is being driven. Furthermore, the predetermined time is changed according to the drive speed (zooming speed) of the PZ motor. Further, since the starting torque becomes large for a certain period of time after the PZ motor is started (when the stopped state or the brake state is changed to the driven state), the end point is not detected. This process is a detail of S351 of the 2 ms timer interrupt routine shown in FIG.

First, it is checked whether or not the PZ motor is being driven. If not, the limit counter T_LMT for detecting that the limit (end point or pseudo end point) has been reached is cleared and the process exits (S2061, S2
071). The PWM timer T PWM is cleared when the PZ pulse is output and the PZ pulse count interrupt process shown in FIG. 12 is entered.

When the PZ drive is in progress, it is checked whether the counter T_START which measures the time from the start-up becomes 0 (whether a predetermined time has elapsed). If it is not 0, the counter T_START is decremented by 1 and the limit is set. Clear the counter T_LMT and exit (S2061, S2063, S2069, S207).
1). Since this processing enters every 2 ms, the counter T_START is decremented every 2 ms. The value of the counter T_START is set to a predetermined value when the zoom motor is started, but the end point is not detected for a certain period after the start.

When the counter T_START becomes 0, it means that a certain period has elapsed since the motor was started.
The process proceeds to the subsequent end point detection process. PWM duty ratio T
_PWMBRK is the maximum limit value N of the PWM duty ratio
When it is equal to or more than _PWMMAX, the end point detection counter T_LMT is incremented by 1 and the process proceeds to S2073. Otherwise, the process directly proceeds to S2073 (S2073).
2065, S2067). When the motor is DC driven (highest speed drive), the duty ratio T_PWMBR
Since the value of the maximum limit value N_PWMMAX is set as K, the limit counter T_LMT is incremented during DC driving (S2065, S2067).

Next, the PWM drive of the zoom motor is controlled as follows. PWM duty ratio T_PWMBRK
Is usually set to a value smaller than the maximum limit value N_PWMMAX. Therefore, the counter T_LMT is not incremented, and the process exits as it is (S2065, S20).
73). However, when the PZ pulse is not output for a certain period, the duty ratio T_
Since PWMBRK is gradually changed to a large value, the same value as the maximum limit value N_PWMMAX (approximately D
C drive), and the counter T_LMT is incremented by 1.

Here, in the case of low speed driving by PWM, PW
Since the value of the M duty ratio T_PWMBRK is initially small, it takes a long time until the counter T_LMT is incremented when the end point or the pseudo end point is reached.
In case of high speed driving by PWM, PWM duty ratio T_
Since the value of PWMBRK is large, the time until the counter T_LMT is incremented when the end point or the pseudo end point is reached is shorter than that at the PWM low speed. By the above process, the end point detection time becomes variable depending on the drive speed of the zoom motor (2063 to S2067). When the counter T_LMT is less than the predetermined value (N_LMT), the predetermined end point detection time has not elapsed, so this subroutine is exited (S2073).

When the counter T_LMT becomes equal to or more than the predetermined value N_LMT, it is regarded as an end point or a pseudo end point. When driving in the tele direction, when the zoom code is at the tele end value, the tele end flag F_TEND is set, and when not at the tele end, the operation is stopped due to some abnormality. Therefore, the pseudo tele end flag F_LMT is set.
T is set (S2075-S2081). When driving in the wide direction, the wide end flag F_WEND is set when the zoom code is at the wide end value, and when the zoom code is not at the tele end, it is stopped due to some abnormality.
Set up LMTW (S2075, S2083 to S208
7).

[SET-SET Processing] The SET-SET flowchart shown in FIGS. 72 to 80 sets the rotation direction and speed of the zoom motor drive, the status (speed control bit) for controlling stop and brake, and the like. This is processing on the side of the power zoom lens 51. This process is a detail of S353 of the 2 ms interrupt routine shown in FIG. The SET-SET processing here includes the MOV processing, INIT3 interrupt processing, NO-MOVE, MOV1 processing, BRK1, 2 processing, STP1 processing, MOV-TRG processing, and DRV-TR shown in FIGS.
G8 processing is included.

First, the power request flag F BATREQ is set, the position of the zoom speed changeover switch 75 is converted into a predetermined code (code indicating direction and speed), and the converted value is stored in the conversion value memory TRNSSPD (S2101,
S2103). Drive to specified position (F_MOVTRG =
If it is 1), it proceeds to MOV_TRG processing, and if it is a normal drive in the designated direction (when F_MOV is set), it proceeds to MOV processing (S2105, S210).
7).

If the zoom operation ring is in the neutral position (zoom switch 75 is off) and the image magnification constant zoom mode is selected, the process proceeds to MOV-TARG processing, and if the image magnification constant zoom mode is not selected. NO-MO
The process proceeds to V processing (S2109, S2115). When the zoom operation ring is not in the neutral position, the process proceeds to NO-MOV processing when the manual power zoom stop bit is set (F_MPZD = 1), and when it is not the manual power zoom, the zoom speed converted from the zoom switch state is used. Address the data SPDDRC
The data is stored in memory 1 and the process proceeds to MOV processing (S2109, S2).
111, S2113).

In the above processing, when the body enters the release processing, the communication command BODY-ATAT
Since the flag F_MPZD is set at E1 (22), the manual power zoom operation during release can be stopped. Further, if the communication command IPZ-STOP (35) for stopping the power zoom is sent, each flag F_MOVTRG, F_MOV, F Since ISZ and the like are cleared, power zoom operations other than the manual power zoom can also be stopped.

[MOV Processing] Next, control of the power zoom motor will be described with reference to the MOV flowcharts shown in FIGS. 73 to 75. This control includes manual zoom and power zoom control in the designated direction (flag F_
This is processing in the body power lens 51 regarding (when MOV is set). First, the flag F indicating the tele-direction drive It is checked whether TELE1 is set (that is, bit0 of the driving direction memory SPDDRC1) (S2201).

When the driving direction is the tele direction and the tele end or the pseudo tele end is reached, the process proceeds to NO-MOV processing (S2201 to S2205). First drive (startup)
In the case of, the process proceeds to the processing for initial setting S2233 (S2207). Then, the zoom motor control memory Z
When the drive direction (zoom motor rotation direction) changes from the previous time, although the previous drive was performed by referring to the data related to the previous zoom motor control set in M_BDST (F
DRCW = 1), or when the power supply from the body 11 is turned off, the process proceeds to a brake process (BRK1) (S2207 to S2211). When the same direction drive was performed last time and the power is supplied, the process proceeds to the speed setting process of S2249 (S2207 to S2211).

When the driving direction is not the tele direction but reaches the wide end or the pseudo wide end (F WEND = 1 or F If LMTW = 1), the process proceeds to NO-MOV processing (S2201, S2223, S2225). If the drive has not reached the wide end or the pseudo wide end but has started, the process proceeds to step S2233 for initial setting, and the drive was continued the previous time, but when the drive direction changes from the previous time or the power supply from the body is turned off. Brake processing (BR
Then, the process proceeds to K1), and when the previous time is the same direction drive and the power is supplied, the process proceeds to the speed setting process of S2249 (S2225 to S2231).

The initial setting process at startup is executed on condition that the power is supplied, and if the power is not supplied, the process proceeds to the stop process (NO-MOV1) (S2233).
When power is supplied, the brake counter T_BRK is set when the brake instruction flag F_BRK of the PZ motor is set (when the motor is braking).
Is incremented by 1 and the brake counter T_BRK
If is equal to or less than the predetermined value (N_BRKREV), the process proceeds to the brake 2 (BRK2) process for the brake process (S22).
35-S2239).

If the brake flag F_BRK is cleared or set, the brake timer T_BRK
Is greater than a predetermined value, the brake is finished, so the start flag F_START is set and the limit timer T
_LMT and PWM timer T_PWM are cleared, the counter is set so as not to detect the end point for a certain period at startup, and the initial value (minimum value) of the PWM duty ratio is set (S2235 to S2241). That is, the start flag F_START is set, the end point detection counter T_LMT and the PWM counter T_PWM are set.
Is cleared, an initial value is entered in the start counter T_START, and a minimum value is entered in the PWM duty ratio T_PWMBRK. PWM duty ratio T_PWMBRK
By setting the minimum value to, the PWM is started at the lowest speed.

When the setting is completed, L of the PZ pulsar 69 is set.
Turn on ED and prepare for PZ pulse count
If the pulse count interrupt (INT3) is not permitted, it is permitted and the process proceeds to the speed setting process (S2249) (S2243 to S2247).

In the speed setting process, the PZ pulse interval (value of T_PWMPLS) is set according to the set speed. In this embodiment, P is set at the set PZ pulse period.
It is configured to control the energization time in PWM so that the Z pulse is output, and the fourth speed can be set, but the present invention is not limited to this. The speed is specified by SPDDR
C1, bit2, 3 (F_SPDA1, F_SPDB
It is specified by 2 bits of 1). For 4th speed, PWM
Since it is not the control but the DC control, the PZ pulse interval is not set, and the maximum value is set to the PWM duty ratio T_PWMBRK for end point detection (S2065 of FIG. 71).

When the speed setting is completed, the speed and its direction (SPDDRC1) are stored in the zoom control memory (ZM_ST1), the drive instruction flag F_DRV of the PZ motor is set, and the brake instruction flag F_BRK of the PZ motor is cleared ( S2251). Note that bits 3 to 0 of ZM_ST1 (flag F SPD
1, F SPDO, F DRCW, F DRCT) is
(Flag F SPDB1, F SPDA1, F WID
E1, F It is set corresponding to each of TELE1).

Further, a tele end pseudo flag F_LIMT
T, wide end pseudo flag F Clear LIMW, P
Flag F that is set when Z is driving in the tele direction
_TMOV, flag F_WMOV set when PZ is driven in the wide direction, flag F_TELE1 indicating the tele direction drive, flag F_W indicating the wide direction drive
All IDE1 are set, and both the tele end flag F_TEND and the wide end flag F_WEND are cleared (S2).
253-S2257). The flags F_TMOV, F
_WMOV, F_TEND and F_WEND are PZ
-A flag of LST data, a flag F_TMOV,
F_WMOV is the flag F_TELE of SPDDRC1.
1 and F_WIDE1 are set respectively.
When either one of the flags F_TMOV and F_WMOV is set (= 1), the other is cleared (= 0).

If the image magnification is constant zoom, the manual power zoom is performed by interrupting the image magnification constant zoom. Therefore, the memory data (P
Z_LST) with the above predetermined flags F_TMOV, F_W
MOV, F_TEND, F_WEND, etc. are set and the process ends (S2259, S2267). If the power zoom is performed by operating the zoom switch (manual power zoom) when the constant image magnification zoom is not being performed, the flag F_M indicating that the manual power zoom is being driven
Data including PZ is zoom state data (PZ-LST)
If it is the control power zoom (zoom in the designated direction), the data including the flag F_IPZB related to the control power zoom is put in the zoom state data (PZ-LST), and the SET-ST processing is ended (S2261 to S226).
5). The content of the PZ_LST data is the command P
It is sent to the camera body 11 by communication regarding Z-LSTATE (10).

[INT3 Interrupt Enable] FIG. 76 shows an interrupt enable process for PZ pulse counting. In this embodiment, the PZ pulse is counted by software with a 2 ms timer interrupt. Therefore, in this processing, the INIT interrupt enable bit is set to enable the counter interrupt by the PZ pulse. Note that this processing is S in FIG.
2247 and the details of S2457 in FIG. 82.

"NO-MOV, NO-MOV1 Process" The NO-MOV, NO-MOV1 process shown in FIG. 77 is a process for stopping the power zoom or shifting to the brake. When the power zoom drive is in progress (when the flag F_DRV is set), the process proceeds to BRK1 processing,
If the power zoom drive is not in progress and the brake is not in progress (the flag F_BRK is clear), the process proceeds to a stop process (STP1), while the brake is in progress, the brake counter is incremented, and if the value exceeds a predetermined value (N_BRK), the stop is performed. The process (STP1) is performed, and when it is smaller than the predetermined value, the brake 2 is used to continue the brake process.
The process proceeds to (BRK2) processing (S2301 to S2307).
Since the NO-MOV1 process is started when the power zoom drive is not being performed, S2301 is skipped and the process is started from S2303.

"BRK1, 2 processing" Brake processing in FIG.
(BRK1), the brake timer T_BRK is cleared.
The flag F indicating the tele-direction drive of the PZ motor DR
Flag F indicating wide drive of CT and PZ motors D
RCW, PZ motor drive speed first instruction flag F SP
D0, PZ motor drive speed instruction second flag F SP
D1 and drive flag F Clear DRV and brake
Set the flag F_BRK (S2311, S231)
3). Since it enters the BRK2 from the second time onwards, S2313
Process only. After performing the above processing, SET-
The ST process ends.

[STP1 processing] STP1 shown in FIG.
The flowchart is a process of setting for stopping the power zoom. First, the PZ pulse count interrupt is prohibited, and the LED of the PZ pulser 69 is turned off (S
2321, S2323).

When the zoom switch 75 is in the neutral position, the ZM_ST1 data is cleared (all flags are cleared), the battery request is canceled, and the process proceeds to S2349 (S2327, S2337, S2347). When the zoom switch 75 returns to neutral, the pseudo end point flags (F_LMTT, F_LMTW) are cleared, so
The zooming operation can be performed again in the direction in which the pseudo end point was previously set.

When the zoom switch 75 is not in the neutral position but is turned on in the tele direction, the flags F_LMTT and F_LMTW in the ZM_ST1 data are left as they are and all other flags are cleared (S2329, S233).
1). If it is the tele end or the pseudo tele end, the battery request is released and the process proceeds to S2349, but if it is neither the tele end nor the pseudo tele end, the battery request is not released and the process proceeds to S2349 (S2333, S2335). When the zoom motor 65 is rotating in the wide direction, the flags F_LMTT and F_LMTW in the ZM_ST1 data are left as they are and other flags are cleared (S2329, S2341).
If it is the wide end or the pseudo wide end, the battery request is released and the process proceeds to S2349, but if it is neither the tele end nor the pseudo tele end, the battery request is not released and the process proceeds to S2349 (S2343, S2345).

In S2349, it is checked whether or not the constant image magnification zoom is in progress, and in S2351, it is checked whether or not the constant image magnification zoom calculation is completed. When the zoom is performed at a constant image magnification and the calculation is not completed, PZ_
Flags F_TEND, F_WEND in LST data,
F_IPZB and F_ISOK are left unchanged, and other flags F_TMOV, F_WMOV, F_IPZI and F_
The MPZ is cleared (S2353). When the constant image magnification zoom is not being performed, or when the calculation has been completed even during the constant image magnification zoom, the flag F_ in the PZ_LST data is
Other flags are cleared while leaving TEND and F_WEND as they are (S2355). The contents of the PZ_LST data are sent to the camera body 11 by communication of the command PZ-LSTATE (10).

The flag F PZPDRC is ZM_
Flag F in ST1 data DRCW, F DRC
It has the same function as T, and F PZPDRC
When = 1, it means the driving in the wide direction.

Then, the logical sum of the data of ZM-ST2 and the predetermined data is stored in ZM-ST2, and the start flag F is stored. START, constant image magnification zoom flag F
ISZ, designated direction drive flag F MOVTRG, designated position drive flag F MOVPLS, F MOVZC and the like are cleared and the SET-ST processing is ended (S2357).
That is, the flag F_PZPO in the ZM-ST2 data
Other flags are cleared while leaving S and F_PZDRC as they are. The flag F PZDRC is ZM-ST1
Flag F in data DRCW, F It has the same function as DRCT and has flag F PZDRC =
A value of 1 means drive in the wide direction.

[MOV-TRG] The flowchart shown in FIG. 81 is the MOV-TRG processing for driving the zooming lens to the designated position. First, it is checked whether the target PZ pulse number is larger than the current PZ pulse (S2401). If it is large, it is a tele-direction drive,
If it is small, it is driven in the wide direction.

When driving in the tele direction, the target pulse number (PZPTRGT) is subtracted from the current pulse number (PZPX) and the difference is used as the drive pulse number in the memory (PZPD).
IF) (S2403). If the target number of pulses and the current number of pulses are equal, it is not necessary to drive, so NO-MO
The process proceeds to V processing (S2405). If they are not equal, the motor drive direction is provisionally set to the tele direction, and if it is the tele end or the pseudo tele end, the process proceeds to NO-MOV processing (S2407 to S24).
11). If the wide direction flag F_DRCW is set or the battery is off when driving is in progress neither at the telephoto end nor the pseudo telephoto end, the process proceeds to BRK1 processing (S2).
413-S2417). When driving in the same direction and the battery is supplied, the process proceeds to the DRV-TRG8 processing (S2413 to S2417). S if not driving
Proceed to 2441.

In the wide direction, the target pulse number (P
ZPTRGR) is subtracted from the current pulse number (PZPX) and the difference is used as the drive pulse number in the memory (PZPDI).
F) (S2423). Then, the driving direction of the zoom motor is provisionally set to the wide direction, and if it is the wide end or the pseudo wide end, the process proceeds to NO-MOV processing (S2427 to S24).
31).

If the tele direction flag F_DRCT is set or the battery is off when driving is in progress neither at the wide end nor at the pseudo wide end, the process proceeds to BRK1 processing (S2433 to S2437). When driving in the same direction and the battery is supplied, the process proceeds to the DRV-TRG8 processing (S2433 to S2437). If it is not driving, proceed to 2441.

In the present control method, when the target PZ pulse and the current PZ pulse become equal, the drive shifts to the braking process, so there is a possibility of pulse overshoot. But,
Since the excess of one pulse hardly causes a problem, when the error pulse PZPDIF is 1 or the error pulse P
Even when ZPDIF is not 1, when the power is off, the process proceeds to NO-MOV1 processing (S2441 to S244).
3).

When the error pulse PZPDIF is not 1 and power is supplied, the brake flag F_BR
If K is set, the brake counter T_BRK is incremented by 1, and when the brake counter T_BRK is smaller than a predetermined value, the process proceeds to the brake process (BRK2) (S2443 to S2449).

If the brake flag F_BRK is cleared or set, the brake counter T_BR
When K is larger than a predetermined value, the braking process is completed. Therefore, the start flag F_START is set, the limit timer and the PWM timer are cleared, and the counter setting for not detecting the end point for a certain period at the start and the initial PWM duty ratio are set. A value (minimum value) is set (S2451). That is, the start flag F_STA
RT is set, and end point detection counters T_LMT and P
The WM counter T_PWM is cleared, the start counter T_START is set to the initial value, and the PWM duty ratio T_PWMBRK is set to the minimum value.

When the setting is completed, L of the PZ pulsar 69 is set.
Turn on ED and prepare for PZ pulse count
If the pulse interrupt is not permitted, permit it and then proceed to the DRV-TRG8 processing (S2453 to S245).
7).

[DRV-TRG8 Processing] The DRV-TRG8 processing shown in FIGS. 83 and 84 is processing for controlling the zoom speed according to the number of drive PZ pulses up to the target focal length, and the number of pulses up to the target position. (PZPDI
The speed is changed stepwise according to F). In the present embodiment, if the number of drive pulses up to the target is the third pulse number or more, the drive is performed at the highest speed of the fourth speed (DC drive), and if less than the third pulse number and the second pulse or more, the third speed is used. If the number of pulses is less than the second pulse number and is greater than or equal to the first pulse number, it is driven at the second speed,
If it is less than the number of pulses, it is driven at the first speed. The fourth speed> third speed> second speed> first speed, and third pulse number> second pulse number> first pulse number. Further, in the present embodiment, the fourth speed is variable, but the number of stages of the variable speed may be more or less than this, and the number of stages may be increased to a level close to stepless.

First, the process proceeds to speed selection processing according to the set zoom speed (S2501). That is,
When the first speed is set, the process proceeds to S2503, when the second speed is set, the process proceeds to S2511, and the third speed is set.
When the speed is set, the flow proceeds to S2521, and when the fourth speed is selected, the flow proceeds to S2541. Note that the speed selection is bit 2, 3 (that is, flag F of SPDDRC2). When MOVTRG is set, in other words, flags F_SPDA2 and F_SPD that indicate the speed at which zooming to the target focal length is performed.
Based on the value of B2). The speed is set as follows by the combination of setting / clearing the flags F_SPDA2 and F_SPDB2. F SPDB2 F SPDA2 clear clear 4th speed clear set 3rd speed set clear 2nd speed set set 1st speed SPDDRC2 is used when the target position is set, and the zoom direction when the zoom lens drive starts and the main CPU35 or lens CPU61
The zoom speed automatically set by is stored.

When the first speed is set, it is checked whether or not the speed and the driving direction (the value of ZM-ST1) are changed, and if there is a change, the PWM brake timer (PWM duty ratio) is set to the first speed. Reference value N_PW
Set MMI0 and do nothing if there is no change, T
-The PWMPLS has a period N_PWM of the first-speed PZ pulse.
P0 is set, and the logical sum of R_INT and predetermined data is put into ZM-ST1 (speed and direction set) (S
2503 to S2509). This sets the lowest speed. Then, the logical product of the PZ-LST data and the predetermined data is calculated, and the logical sum of this logical product and the R_INT data is put into the PZ-LST data, and this SET-ST process is ended (S2551).

When the second speed is set, it is checked whether the pulse number to the target (PZPDIF) is equal to or more than the first pulse number. If it is smaller, DRVPWM0 (1
Proceed to S2503). If so, the process proceeds to step S2513, and the speed and direction (ZM
-ST1 value) is checked, and if there is a change, the second speed reference value N_PWMMI1 is set in the PWM brake timer (PWM duty ratio), and if there is no change, T -Set the second speed PZ pulse cycle N_PWMP1 to PWMPLS and set R_I
The logical sum of the NT data and the predetermined data is put into ZM-ST1 and the process proceeds to S2551 (S2503 to S2509). By the above processing, the second speed is set.

When the third speed is set and the number of pulses to the target (PZPDIF) is less than the first number of pulses, the process proceeds to the first speed process (DRVPWM0) of S2503, where the number of pulses is equal to or more than the first number of pulses. If the number of pulses is less than 2, the process proceeds to the second speed processing DRVPWM1 (S2521, S252).
3). If the second pulse or more, the speed and direction (value of ZM-ST1) for controlling at the third speed
Check if there is any change, and if there is a change, PW
The M brake timer (PWM duty ratio) is set to the third speed reference value N_PWMMI2, and if there is no change, T_PWMPLS is set to the third speed PZ pulse cycle N_PWMP2 to set the R_INT data and the predetermined data. Put the logical sum of and into ZM-ST1 and S2551.
(S2523-S2531). By the above processing, the third speed is set.

When the fourth speed is set, it is checked whether the pulse number to the target (PZPDIF) is equal to or more than the first pulse number, and if it is less than the first pulse number, S2
Proceeding to the first speed process (DRVPWM0) of 503, it is checked whether the number of pulses is equal to or more than the first pulse number and less than the second pulse number. Second, check if
If the number of pulses is greater than or equal to the number of pulses and less than the third number of pulses, then DRVPWM
If the number of pulses is greater than or equal to the third pulse number, the PWM brake timer (PWM duty ratio) is set to the maximum value N_PWM.
MAX is set, the logical sum of R_INT data and predetermined data is input to ZM-ST1, and the process proceeds to S2551 (S2551).
2547, S2549). As a result, the fourth speed (DC drive) is set.

"PZP-CNT processing" FIGS. 85 to 89
The PZP-CNT flow chart shown in FIG. 3 is a process relating to PZ pulse count. This process is 2ms in FIG.
It is the details of S355 of the timer interrupt routine.

When the PZ pulse is corrected when the zooming lens group 53Z is at the wide end (that is, when the PZP correction inhibition flag F_PZPADJ = 0), the current PZ pulse value and PZ pulse count start value are set to 0. To F, and flag F indicating whether the current position is known If PZPOS is set, the process proceeds to PZP-CNT5 processing, and if the current position flag is cleared, the process proceeds to power zoom initialization (PZ-INIT) processing (S2601 to S2605, S2615). When not correcting, when the current position is known (F PZP
When OS = 1), the process proceeds to the current position OK (POS-OK) process, and when the current position is unknown ((F PZP
When OS = 0), the process proceeds to the current position unknown (POS-NG) process (S2603, S2607).

Similarly, when the zoom lens is at the tele end, when the PZ pulse is corrected, the current PZ pulse value and PZ pulse count start value are set to the maximum value (N
_PZPMAX), if the flag indicating whether the current position is known is set, the process proceeds to PZP-CNT5 processing, and if the flag indicating whether the current position is known is cleared, PZ initialization (PZ-INI) is performed.
T) Proceed to processing (S2609, S2611, S261)
3). If not corrected, the current position is OK (POS) when the current position is known (when the flag is set).
-OK) processing, and if the current position is not known, the current position is unknown (POS-NG) processing (S261).
1, S2607). As described above, when the zooming lens group 53Z is at the wide end (F_WEND = 1) or the tele end (F_TEND = 1), PZ is set to a predetermined value.
Correct the pulse. Note that F_PZPADJ is a test flag, and when F_PZPADJ = 1, no correction is performed.

When it is neither the tele end nor the wide end, the process proceeds to the current position OK (POS-OK) process if the current position is known, and proceeds to the current position unknown (POS-NG) process if the current position is not known ( S2601, S26
11, S2607).

[POS-NG, PZ-INIT Processing] POS-NG, PZ-INI shown in FIGS. 86 and 87.
The T process is a process when the current position is unknown, or when the tele end or the wide end is reached. POS-NG,
The PZ-INIT processing is processing when the current position of the zooming lens is unknown, but normally when the current position is unknown, for example, when the main switch of the camera body is turned on, or manual zoom is switched to electric zoom. Switch to the power zoom initialization command PZ-INITPOS (32) from the camera body.
Is also executed when is sent by communication.

In this embodiment, when the PZ-INITPOS command is sent, the zooming lens group 53Z is moved to the tele side at the lowest speed to detect the first division point 72 of the zoom code plate 71 or the tele end. The current position of the zooming lens group 53Z is known by reading the absolute PZ pulse number at that position from the table data and recording it in a predetermined address (PZPX, PZPSTRT). In this embodiment, after detecting the current position,
The operation of returning the zooming lens group 53Z to the original position before the movement is performed. This is PZ_INITPOS
When a command is sent, a counter (PZP
AZB) is cleared (set to 0), the PZ pulse to the first division point or the tele end of the zoom code plate is counted, and the zooming lens is returned from that position (when the current position is detected) by that count. It is realized by that. The operation for returning this zooming lens is P
The Z-INIT process (especially S2637 to S2649) is performed.

The operation for moving to the tele side at the lowest speed is P
It is executed by Z-INITPOS command communication. In the present embodiment, the telephoto direction is uniformly driven to detect the current position, but this may be in the wide direction, or either one may be selected depending on some conditions. Further, in this embodiment, when the current position is unknown, even if the PZ_INITPOS command is not sent from the camera body 51, if the manual power zoom is moved, the zoom code plate can be moved to the division point or end point (tele end, wide end). When it comes, it is a system that automatically detects the current position (knows the current position).

If the start flag F_START is set when the POS-NG process is started (when the zoom motor is started), the PZ pulse number conversion value (PZ pulse) of the code of the zoom code plate 71 read this time is read by the current position and the start pulse counter. After inputting the rough detection value), the process proceeds to the zoom motor drive (DRIVSTRT1) process (S2621,
S2623).

When the start flag F_START is down, the following processing is performed. If the zoom code is the same as the previous one, you have not reached the switching point,
Exit from the PZP_CNT processing (S2623, S262)
5). If the zoom code has changed (at the division point of the code plate), if the camera is driven in the tele direction (F_PZPDRC = 0), the PZ pulse conversion value of the zoom code input this time is changed to the current PZ pulse value (PZPX) and PZ. Put in the pulse count start value (PZPSTRT) and if the drive is in the wide direction (F_PZPDRC = 1), the PZ pulse conversion value of the previously input zoom code is the current PZ pulse value (PZPX) and PZ pulse count start value (PZPSTRT). (S2627 to S263
1).

When the move flag (F_MOV) is cleared (when the PZ_INITPOS command is not sent) or when the flag F_PZPINIT is set, the flag F_PZPOS indicating that the current position is recognized is set. Then, the process proceeds to pulse count (PZP-CNT5) processing (S2633, S26).
35, S2649).

Move flag F_MOV is set (P
When the Z-INITPOS command is sent) and the current position flag F_PZINIT is down, the current PZ pulse value (code plate boundary value) is changed to PZ.
A value obtained by subtracting the PZ pulse count value (PZPAZB) from the original position before the initialization operation to the boundary position of the code plate is set as the target PZ pulse (PZPTRGT) (S2633, S2635, S2637). It should be noted that F_PZPINIT is a flag for prohibiting the PZ initialization return operation, and is used for testing. F_P
It is prohibited at ZPINIT = 1.

When there is a borrow in the subtracted value, there is some erroneous count, so the target PZ pulse number is set to 0 and the drive flag F is set. If MOV is cleared and there is no borrow, the move flag is cleared as it is (S263).
9, S2641). Then, the target value move flag (F_
(MOVTRG), PZ speed to 1st speed (lowest speed), current position flag to PZP
-Proceed to CNT5 processing (S2643 to S2649). When the process comes from the PZ-INIT process, the process starts from step S2633.

[POS-OK, DRVSTRT1 processing]
The POS-OK process shown in FIG. 88 is a PZ pulse count process when the current position is known.
When it has already started (when the start flag is cleared), PZ pulse correction processing (PZP-ADJ
Processing, and when starting up, when driving in the tele direction (F
_PZPDRC = 0), the PZ pulse count start value (PZPSTRT) and the PZ pulse count value (PZ
(PCNT) is added to the PZ pulse count start value (PZPATRT) and the current PZ pulse count value (PZPX), and when driving in the wide direction (F_PZ
PDZ = 1, PZ pulse count start value (P
ZPSTRT) to PZ pulse count value (PZPCN
TZ is subtracted to start the PZ pulse count start value (PAP
ATRT) and the current PZ pulse value (PZPX) (S2651 to S2657).

Then, the start flag F_START is cleared, and when the tele-direction move (the direction to move this time), the power zoom direction flag F_PZPDRC is cleared (the tele-direction is set) and the wide-direction move (the direction to move this time) ), The power zoom direction flag F_PZPDRC is set (wide direction is set) (S2659 to S2665).

When coming from DRIVSTART1, S
At step 2659, the start flag is cleared and the driving direction is set (S2659 to S266).
5). "PZP-ADJ, PZP-CNT5 Processing" The PZP-ADJ processing shown in FIG. 89 is processing for correcting the cumulative error of the PZ pulse count value.

First, it is checked whether the zoom code is the same as the previous one, and if it is the same, the correction cannot be made. Therefore, the PZP-C
PZP correction prohibition flag F
The correction process is continued on condition that _PZPADJ is cleared. That is, the division area (boundary) of the code plate 71
Wait for you to cross. The PZP correction prohibition flag F_PZDADJ is for testing and is normally cleared.

If the power zoom drive direction is the tele direction, the pulse conversion value of the current zoom code is stored in the register X, and if it is the wide direction, the pulse conversion value of the previous zoom code is stored in the register X. The value of the register X is stored in the accumulator, and it is checked whether the absolute value of the difference between this value and the current PZ pulse value is less than the correction limit value (S2679 to S2683). If it is equal to or larger than the correction limit value, the value of the register X is added to the current PZ pulse value and PZ pulse count start value to perform correction,
If it is less than the limit value, no correction is made. Then, the PZ pulse count value (PZPCNT) is cleared, the PZ pulse number (PZPX) at the current focal length is converted to the current focal length (mm) based on the table data, and stored in FCLXL, H and stored in P.
Exit the ZP-CNT process (S2685-S268
9).

When the PZP-CNT5 process is started, the flow goes to S2683 to clear the PZ pulse count value, convert the number of pulses at the current focal length to the current focal length (mm), and memorize the PZP-CNT. Exit processing (S2
685-S2689).

PZ-INITPOS from the above body
When there is an instruction to execute the PZ pulse initialization processing by the command (when the body main power supply is turned on, etc.), the zooming lens group 53Z is zoomed to the tele side, and when the division area of the code plate 71 is exceeded, the division area is generated. Current position P by detecting the absolute position from the boundary position of
Z pulse value (PZPX) and start position (PZPS
TRT) can be set. It is also possible to return to the original position after detecting the current position.

During zooming, each time the boundary of the code plate 71 is crossed, the absolute pulse number at the boundary is read from the table and compared with the count value. If the error is larger than a certain value, it is corrected (corrected). If it is less than a certain value, it is not corrected.

"ISZMEMO processing" I shown in FIG.
The SZMEMO flowchart is a process of storing the image magnification. In other words, in the constant image magnification zoom mode,
Current AF pulse value (AFPX) and current focal length (F
CLXL, H) to the zoom speed selector switch 7
5 or a process of storing a memory by operating the set SW (SL switch SW). This process is a detail of S359 of the 2 ms timer interrupt routine of FIG. In this embodiment, when the zoom ring is returned to the neutral position, or if the zoom ring is not in the neutral position, on the condition of focusing,
When the set switch is turned off, the AF pulse value and the focal length at that time are stored.

In the ISZMEMO processing, the image magnification lens memory flag F ISM is set, constant image magnification mode is selected, and focus flag F On condition that AFIF is set, the process proceeds to the memory processing after S2707 (S2701 to S2705). The image magnification lens memory flag F_ISM uses the command PZ-BSTATE (2
0) from the body and stored in the PZ-BDST. This flag The ISM is a flag for determining whether the memory of the image magnification is performed by the ISZ-MEMORY command from the camera body side or the lens side.

Since the image magnification memory flag F_ISM is normally cleared and sent, the image magnification memory (current AF pulse value and current focal length memory) is not arbitrarily set on the lens side. , Command I from the body
It is performed when SZ-MEMORY (36) is sent. In addition, the timing at which the command ISZ-MEMORY (36) is sent is the periodic communication POFF-ST.
ATE (11) bit2 (SLSW) and LENS-
Bit0, 1 of INF1 (13) (PTSW, PWS
W) seen from the body side, lens set switch SL
It is when the (SL switch) and the zoom speed switch 75 are turned on / off and the zoom speed switch 75 is returned to the neutral position or the set switch SL is turned off.

When the flag F_ISM is set and sent, the set switch SL and the zoom speed switch 75 on the lens side do not depend on the command ISZ-MEMORY from the body as described in this processing.
Image magnification memory is performed by determining ON / OFF of.

When the zoom switch 75 has been returned to the neutral position this time instead of the neutral position last time, even if not, when the set switch was turned on last time but turned off this time,
The current value of the AF pulse is stored in the address ISZ-AFPL, H, and the current focal length is stored in the address ISZ-F.
Image magnification calculation instruction flag F_IS stored in CLL and H
After setting ZM, the ISZMEMO processing is ended (S2707 to S2719).

That is, on condition that the subject is in focus and the flag F_ISM is set, the zoom switch 75
Is returned to the neutral position from the tele or wide direction, or when the set switch is turned off from the on state, the image magnification at that time is stored.

"MTL-CTL Processing" M shown in FIG.
The TL-CTL flowchart is a process relating to drive control of the zoom motor 65 according to the zoom motor control flags (each flag of ZM-ST1) set in the SET-ST process. This process is a detail of S363 of the 2 ms timer interrupt routine shown in FIG.

The drive flag F_DRV is cleared,
And when the brake flag F_BRK is set, the zoom motor 65 is braked, and when the brake flag F_BRK is cleared, the zoom motor 65 is set to the free state, then the 2ms timer is started, and the 2ms timer interrupt is permitted. The PWM interrupt is prohibited and the process ends (S2801, S2809 to S281).
3, S2817, S2819).

When the drive flag F_DRV is set, the zoom motor 65 is activated in the tele direction in the tele direction, and the zoom motor 65 is activated in the wide direction in the wide direction (S2801 to S280).
7). Then, when driving the motor to the fourth speed (DC), the 2 ms timer is started, the 2 ms timer interrupt is enabled, the PWM interrupt is prohibited, and the process ends (S281).
5, S2817, S2819).

In the PWM driving of the first to third speeds, P
The WM hard timer is incremented by 1, and when the incremented value overflows, the maximum value (FFH) is set in the PWM hard timer, and when not incremented, the incremented value is held (S
2815, S2821 to S2825).

Next, the PWM hard timer value (T_PW
M) exceeds the PWM PZ pulse period (T_PWMPLS) (PZ within the PWM PZ pulse period time)
Check if the pulse is output or not. If it exceeds, the pulse is not output within the cycle, so increase the duty ratio (T_PWMBRK). The hard timer for PWM control and starts the hard timer for PWM control (S2827 to S2).
833). And start the 2ms timer, 2ms
The timer interrupt is permitted, the PWM interrupt is permitted, and the process ends (S2835, S2837).

[Release Processing] Next, FIG. 92A to FIG.
With reference to FIG. 2C, the release process in the camera body 11 at step S1179 in FIG. 55 will be specifically described. This release process is step S1.
The release side switch SWR is turned on in 176, and the main CPU 3 on the body side is set under the start condition that it is determined in step S1178 that the release is possible.
5 is executed.

When the release process control operation is started, first, in step S4001, an inter-exposure zoom control flag F for instructing zoom control during exposure is given. EXZCTL
To clear. Here, the inter-exposure zoom means that during the exposure operation, a zooming operation is performed by using at least a part of the exposure time so that the photographed image is partially expanded or contracted, that is, the radial direction. It is an aspect of an image capturing method for forming an image portion flowing along a line. Then, in step S4003 subsequent to step S4001, whether or not the power zoom lens 51 is attached (that is, the power zoom flag F PZ
Is set), the power zoom lens 51 is not attached (that is, the power zoom flag F). PZ = 0), in other words, when a manually driven zoom lens is attached, it is impossible to automatically perform the exposure-to-exposure zoom on the camera side. Therefore, the exposure-to-exposure zoom control is performed. The normal release operation is executed without executing.

Specifically, step S4005, step S4007, and step S4009 are sequentially executed to raise the mirror and execute aperture control.
The front curtain of the shutter starts running. And step S
4011, the above-described inter-exposure zoom control flag F
Determine the set state of EXZCTL. Here, in step S4003 described above, the power zoom lens 5
As long as it is determined that 1 is not attached, the during-exposure zoom control flag F EXZCTL is never set. Therefore, in this step S4011, the during-exposure zoom control flag F Since EXZCTL remains cleared by the setting in step S4001 described above, it is determined to be NO.

If NO in step S4011, it is determined in step SS4013 whether or not the shutter setting is the valve state. If it is determined in step S4013 that the valve is not the valve, the process proceeds to step S4015. Then, after waiting for the preset exposure time to elapse, when the exposure time elapses, the trailing curtain starts traveling in step S4017. Then, in step S4019, the completion of the running of the rear curtain is waited, and when the running of the rear curtain is completed, in step S4021, the BODY-STATE is completed.
One communication is executed, the manual power zoom is prohibited, and a command to stop the zoom during exposure is sent to the power zoom lens 51 side to stop the power supply from the battery. That is, in step S4023, the battery request flag F on the body side. BBATREQ is cleared, and BATONOFF processing is executed in step S4025.

Thereafter, in step S4027, the mirror motor 33 is activated to lower the mirror, in step S4029 the film winding motor 25 is activated to execute the film winding operation, and in step S4031, the BODY-STATE1 communication is performed again. Run, release is not in progress, film winding is not in progress, I
The permission state of the PZ operation (that is, the auto zoom operation other than the manual power zoom) and the permission state of the manual power zoom operation are transmitted to the power zoom lens 51 side, and the process returns to the main routine shown in FIG. 55.

On the other hand, if it is determined in the above step S4013 that the shutter setting is the valve state, in step S4033 the release switch SW is set.
Wait for R to turn off, then release switch SWR
Is turned off, the process proceeds to step S4017 described above,
The control operation after the operation to start the trailing curtain is executed.

If it is determined in step S4003 that the power zoom lens 51 is attached, then in step S4035 the IPZ-S is selected.
Before sending the TOP command to the power lens side to start the actual release operation, the click zoom operation and the constant image magnification zoom operation are prohibited, and in step S4037, a flag F for instructing the constant image magnification zoom operation. Flag F for instructing ISZON and preset zoom operation Clear IPZON together. Then, the following step S4039
At, it is determined whether or not the during-exposure zoom (EXZ) mode is set. If it is determined in step S4039 that the during-exposure zoom mode is not set, in step S4041 the BODY-S is set.
Execute TATE1 communication, release operation is not in progress, film winding is not in progress, IPZ operation is prohibited,
Also, the fact that the manual power zoom operation is prohibited is transmitted to the power zoom lens 51 side. Then, the processing proceeds to step S4005 described above, and the control operation after the mirror up operation is executed. In particular, in step S4011, the during-exposure zoom control flag F still remains. EXZC
Since it is determined that TL has been cleared, the normal release operation is executed.

If it is determined at step S4039 that the during-exposure zoom mode is set, on the other hand, at step S4043, the body side battery request flag F is set. Set BBATREQ, step S
In 4045, BATONOFF processing is executed, and power is supplied to the power zoom motor 65 of the power zoom lens 51. And. In subsequent step S4047, PZ-LSTATE data communication is executed to obtain information on whether the manual power zoom is on or off from the power zoom lens 51 side.

Then, in the succeeding step S4049, it is determined whether or not the shutter setting is the valve. If it is determined that the valve is the valve, in step S4051, the BODY-STATE1 communication is executed to perform the release operation. Something, not being film winding, IP
The prohibited state of the Z operation and the permitted state of the manual power zoom operation are transmitted to the power zoom lens 51 side, and the process proceeds to step S4005 described above to execute the control procedure after the mirror up operation.

That is, in the state where the bulb is set, the exposure time is arbitrarily set according to the photographer's intention even if the zoom operation during exposure is set. It is impossible to know, and it is not possible to stipulate when the auto power zoom should be started after the start of the first curtain or until when the auto power zoom should be started after the start of the first curtain. Zooming during exposure will be prohibited. However, in this embodiment, in order to allow the zoom operation according to the photographer's intention within the valve opening time intended by the photographer and freely perform the inter-exposure zoom operation, As described above, step S4
In 051, the manual power zoom operation is permitted.

As a result, the photographer can freely perform the inter-exposure zoom operation by his / her own will by setting the bulb and then the inter-exposure zoom mode. That is, the photographer keeps the zoom switch ring 78 (not shown) in a neutral state for a period during which the user wants to perform the zoom between exposures while keeping the release switch SWR pressed, that is, while keeping the exposure operation. By rotating the lens barrel from the position around the central axis of the lens barrel, the manual power zoom (exposure between exposures) is performed at the zooming speed according to the rotation amount and the zooming direction set by the rotation direction. Can be done.

On the other hand, in step S4049 described above, when it is determined that the shutter setting is not in the valve mode and a predetermined shutter speed is set,
Hereinafter, the inter-exposure zoom will be executed. Prior to execution of the normal inter-exposure zoom (that is, the auto-exposure zoom automatically executed on the camera side), in step S4053, the half-exposure zoom (half MPZ) mode is determined. Here, in the half-exposure zoom mode, the camera does not automatically perform the inter-exposure zoom, but executes the inter-exposure zoom operation by the manual power zoom for half the set exposure time. It is a mode for. In other words, this half-exposure zoom means that during the inter-exposure zoom operation of the manual power zoom, power zooming is automatically prohibited for half the exposure time, and the exposure is performed by the photographer himself. It is a mode that assists the user to easily perform the inter-zoom operation.

In step S4053, the zoom mode during half-exposure in the manual power zoom is not set,
When it is determined that the during-exposure zoom mode that is automatically executed on the camera side is set, step S
In 4055, the on / off state of the manual power zoom is determined based on the PZ-LSTATE data communication result read in step S4047 described above. If it is determined in step S4055 that the manual power zoom is off, the half-exposure zoom mode is not set, and the manual power zoom is not on. Therefore, step S4
057, where the during-exposure zoom control flag F E
Set XZCTL to declare that the zoom operation between exposures is being performed.

Thereafter, in step S4059, the zooming direction of the power zoom lens 51 in the inter-exposure zoom (that is, the wide direction from the tele end to the wide end,
Alternatively, the power zooming time in the inter-exposure zoom is set in step S4061 and the zooming speed in the inter-exposure zoom is set in step S4061. The control procedure for setting the zooming direction in step S4059, and step S4
The control procedure for setting the zooming speed in 063 will be described in detail later using subroutines.

After step S4063 is executed, in step S4065 that follows, BODY-STAT is set.
The E1 communication is executed to transmit to the power zoom lens 51 side that the release operation is in progress, the film is not being wound up, the IPZ operation is prohibited, and the manual power zoom operation is prohibited. Thereafter, in step S4067, whether the power zooming operation in the inter-exposure zoom is executed in the first half of the exposure time (hereinafter, simply referred to as first half drive) or in the second half (hereinafter, simply
This is called the second half drive. ) To judge.

Incidentally, the first half drive in this zoom between exposures /
The setting of the latter half drive is not shown, but the function switching /
It can be freely set by the photographer via the setting switch. If it is determined in step S4067 that the drive is the first-half drive, then in step S4069, the power is zoomed to the designated direction or the predetermined distance stored in the designated memory.
Issue the PZMD command to the power zoom lens 51 side,
The automatic power zooming operation in the power zoom lens 51 is started. After this, step S4005 described above
Then, the control procedure after the mirror up operation is executed. That is, when the first half drive mode is set in the inter-exposure zoom, the power zooming operation is automatically started at the same time when the exposure is started.

On the other hand, if it is determined in the above step S4067 that the zoom is not the inter-exposure zoom of the first half drive, that is, the zoom is the inter-exposure zoom of the second half drive, this step S4069 is skipped and the direct step S4005 is performed.
Then, the control procedure after the mirror up operation is executed. In other words, in the state where the latter half drive mode is set in the inter-exposure zoom, the normal power exposure operation is started without starting the automatic power zooming operation when the exposure is started.

In this way, whether in the first half drive or the second half drive, the exposure operation is started with the zoom mode between exposures set, and step S4005, step S4007, and step S4009 are sequentially executed, and when step S4011, the above operation is performed. In step S4057, during-exposure zoom control flag F has already been set. Since EXZCTL has been set, YES is determined in step S4011. In this step S4011, YE
When it is determined to be S, it is determined again in step S4071 whether the during-exposure zoom operation is the first half driving or the second half driving. When it is determined in this step S4071 that the zoom is during the first-half drive exposure, the process waits for the elapse of the power zoom drive time set in step S4061 described above in step S4073, and after this elapses, the BODY-STATE1 communication is performed in step S4075. By executing the release operation, the fact that the film is not being wound, the IPZ operation prohibited state, and the manual power zoom operation prohibited state are transmitted to the power zoom lens 51 side. In this way, the manual power zoom operation and the automatic power zoom operation after the lapse of the power zooming time are prohibited, and thereafter, the above-described step S4 is performed.
Proceed to 015 and wait for the exposure time to elapse.

On the other hand, if it is determined in the above-described step S4071 that the zoom is between the exposures in the latter half drive, the process proceeds to step S4077, and waits for the time obtained by subtracting the power zoom drive time from the set exposure time. After the lapse of time, in step S4079, it is determined whether or not zooming is performed during half exposure. If it is determined in step S4079 that the zoom is not performed during half-exposure, then in step S4081, the power is zoomed to the designated direction or the predetermined distance stored in the designated memory.
Issue the PZMD command to the power zoom lens 51 side,
The automatic power zooming operation in the power zoom lens 51 is started. After this, step S4015 described above.
Proceed to and wait for the set exposure time to elapse.

If it is determined in step S4053 that the switch for setting the half-exposure zoom (half MPZ) is on, step S40.
In 83, the during-exposure zoom control flag F EXZCT
L is set, and in subsequent step S4085,
It is determined whether or not it is the first half drive. This step S40
If it is determined in 85 that the drive is the first-half drive, the process advances to step S4055 described above to determine whether the MPZ is turned on, that is, whether the zoom operation ring 78 is rotated. In this Step S4055, M
When the PZ is turned off, that is, the zoom operation ring 7
If it is determined that No. 8 has not been rotated, the process proceeds to step S4057 described above, and the control operation thereafter is executed. That is, even if the half-exposure zoom in the manual power zoom is set, if the zoom operation ring 78 is not rotationally driven, the photographer actually starts the half-exposure zoom by the manual power zoom. It is judged that it is not intended, and the normal zoom operation between exposures is executed.

On the other hand, in step S4055 MPZ
When it is determined that the zoom operation ring 78 is actually turned on, that is, when it is determined that the zoom operation ring 78 is actually rotationally driven, the process proceeds to step S4051 where BODY.
-Execute STATE1 communication to transmit to the power zoom lens 51 side that the release operation is being performed, the film is not being wound, the IPZ operation is prohibited, and the manual power zoom operation is allowed. In this way, when the zoom operation ring 78 is already rotationally driven by the photographer at the start of release, the auto power zooming automatically executed on the camera side does not start, The manual power zoom is permitted and executed at the power zooming speed corresponding to the rotation amount of the zoom operation ring 78 and the zooming direction corresponding to the rotation direction. That is, the first half drive of the half-exposure zoom in the manual power zoom is executed.

After this, step S4005, step S
4007, step S4009, step S4011,
After sequentially performing step S4071 and step S4073,
When the zoom time between exposures in the first half drive has elapsed, as described above in step S4075, BODY-ST
The ATE1 communication is executed to transmit to the power zoom lens 51 side that the release operation is in progress, the film is not being wound up, the IPZ operation is prohibited, and the manual power zoom operation is prohibited. As a result, even if the state in which the zoom operation ring 78 is rotationally driven by the photographer continues even after the exposure-exposure zoom time elapses, the manual power zoom is prohibited from this point,
In this way, the power zooming operation in the first half of the exposure time in the half-exposure half-exposure zoom mode is completed. After that, the normal release operation described with reference to step S4015 and subsequent steps is executed in the latter half of the exposure time, and the half-exposure half-exposure zoom operation in the first half drive is performed in the entire exposure time in this manner. The migration is completed.

On the other hand, in step S4053, the half-exposure zoom mode is set, and
If it is determined at 4085 that the latter half drive is set, then the flow proceeds to step S4057 described above, and the subsequent control procedure is sequentially executed as described above. That is,
In the manual power zooming operation executed in the latter half of the exposure time, the zooming direction of the inter-exposure zoom, the zooming time, and the zooming speed are sequentially set. Then, when the latter half drive is determined in step S4071 described above, the process advances to step S4077, and waits for the time obtained by subtracting the zooming time for performing the power zoom from the set exposure time. After this elapses, if it is determined in the subsequent step S4079 that the mode is the half-exposure zoom mode, in step S4087, the LENZ-INF1 communication for sending the variable information of the power zoom lens 51 to the camera body 11 side is executed, and the zoom is performed. The on / off state of the power zoom switch PZSW, which is turned on / off by rotating the operation ring 78, that is,
Information on whether the zoom operation ring 78 is rotated in the tele direction or in the wide direction is communicated to the body 11 side.

Then, in the following step S4089, it is determined whether or not the zoom operation ring 78 is rotated based on the information obtained in step S4087, and it is determined that the zoom operation ring 78 is rotated here. If so, go to step S4091, where BOD
The Y-STATE 1 communication is executed to transmit to the power zoom lens 51 side that the release operation is being performed, the film is not being wound, the IPZ operation is prohibited, and the manual power zoom operation is allowed. As a result, as described above, since the zoom operation ring 78 is already rotationally driven by the photographer, the manual power zoom is executed at the power zooming speed according to the rotational amount. That is, the second half drive of the half-exposure zoom in the manual power zoom is executed.

In one embodiment, when the half-exposure zoom mode in the manual power zoom is set, the zoom operation ring 78 by the photographer is set regardless of whether the first half drive is set or the second half drive is set.
The manual power zoom is executed at the zooming speed based on the rotation amount of the. In this way, step S40
After the manual power zoom is permitted in 91 and the power zooming operation in the latter half of the exposure time in the half-exposure half-exposure zoom mode is started, the release operation described with reference to step S4015 and subsequent steps is performed. The zoom operation during the half-exposure in the latter half drive is completed over the entire exposure time.

On the other hand, when it is determined in step S4089 described above that the zoom operation ring 78 has not been rotated, the same idea as in step S4055 described above is used, that is, in the case of manual power zooming, for example. Even if the during-exposure zoom mode is set, if the zoom operation ring 78 is not rotationally driven, it is determined that the photographer does not actually intend to start the half-exposure zoom by the manual power zoom. The process proceeds to step S4081 described above, and the power is zoomed to the specified direction or the specified distance stored in the specified memory.
The -PZMD command is issued to the power zoom lens 51 side, and the auto-exposure zoom operation on the camera side is executed in the latter half of the exposure time. After that, the release operation described with reference to step S4015 and subsequent steps is executed, and in this way, the half-exposure half-exposure zoom operation of the second half drive is completed over the entire exposure time.

[Summary of In-Exposure Zoom in Release Process] Table 16 collectively shows the control state of the in-exposure zoom in the release process described above.

[0388]

[Table 16] As is clear from Table 16, when the shutter setting is the valve, there is no distinction between the first half drive and the second half drive, and the manual power zoom is executed in an arbitrary period based on the photographer's intention. Will be

On the other hand, in the normal shutter mode in which the predetermined exposure time is set, first, in the first half drive mode,
When the zoom operation ring 78 is rotated with the half-exposure zoom set, the during-exposure zoom control flag F is displayed. EXZCTL is set, manual power zoom is allowed only in the first half of the exposure time, manual power zoom is prohibited in the second half of the exposure time,
In addition, the zoom during automatic exposure is stopped for the entire exposure time. When the zoom operation ring 78 is not rotated, the auto power zoom is performed only in the first half of the exposure time, the manual power zoom in the first half is prohibited, and the manual power zoom in the second half of the exposure time is not performed. It is prohibited and the auto power zoom is stopped.

Also, in the first half drive mode, in the state where the zoom during half exposure is not set, the zoom operation ring 7
When 8 is rotated, the during-exposure zoom control flag F
The EXZCTL is cleared, the manual power zoom for the entire exposure time is permitted, and the automatic power zoom for the entire exposure time is stopped. When the zoom operation ring 78 is not rotated, the during-exposure zoom control flag F is displayed. EXZCTL is set, manual power zoom is prohibited for the entire exposure time, auto power zoom is performed in the first half of the exposure time, and
The auto power zoom is stopped in the latter half of the exposure time.

Further, in the latter half drive mode, when the half exposure zoom is set and the zoom operation ring 78 is rotated, the during exposure zoom control flag F is set. With EXZCTL set, the zoom operation ring 78 permits the manual power zoom only in the latter half of the exposure time, and prohibits the manual power zoom in the first half of the exposure time.
In addition, the zoom during automatic exposure is stopped for the entire exposure time. When the zoom operation ring 78 is not rotated, the during-exposure zoom control flag F EXZCTL
Is set, the auto power zoom is executed only in the latter half of the exposure time, the manual power zoom in the first half is prohibited, and the manual power zoom in the first half of the exposure time is prohibited and the auto power zoom is stopped. There is.

In the latter half drive mode, zooming during half exposure is performed.
When the is not set, the zoom operation ring 7
If 8 is rotated, zoom control flag between exposures
F EXZCTL is cleared and the manual is displayed for the entire exposure time.
Al power zoom is allowed and auto over the entire exposure time
Power zoom is stopped. Then, zoom operation
If the zoom 78 is not rotated, the zoom control during exposure is performed.
Your flag F EXZCTL is set and the total exposure time is
Manual power zoom across is prohibited and after exposure time
Auto power zoom in half is performed and the dew
The power zoom is stopped in the first half of the light time.

[Procedure for setting the zooming direction in the inter-exposure zoom] Next, referring to FIG. 93A, the procedure for setting the zooming direction when executing the inter-exposure zoom in step S4059 described above will be described in detail as a release processing subroutine. Explained.

In this embodiment, the details will be described later, but the zooming direction in the inter-exposure zoom is defined according to the current focal length set by the power zoom lens 51. Has been done.

That is, when the control procedure advances to step S4059, it is determined in step S4101 whether or not the zooming direction is preset. That is, when it is determined that the zooming direction is predetermined by the function setting means (not shown) and is already stored in the E ² PROM, the process proceeds to step S4103, where the E ² PR is set.
The zooming direction stored in the OM is read out, and in the subsequent step S4105, the zooming direction read out in step S4103 is moved. The bit B4 or B5 of the PZMD command is set, the control procedure is terminated, and the process returns to the original main routine. That is, E ² PROM
If the zooming direction stored in is the tele direction, MOVE The bit B4 of the PZMD command is set to 1 and the bit B5 is cleared to 0. On the other hand, E ² PR
If the zooming direction stored in the OM is the wide direction, MOVE Set bit B4 of PZMD command to 0
And clear bit B5 to 1. As a result,
When the zoom between exposures is executed, the above-mentioned step S4059 is executed, so that step S410 is executed.
The zooming direction set in 5 is set, and power zooming is performed in this set zooming direction.

On the other hand, if it is determined in step S4101 that the zooming direction has not been set in advance, then the flow advances to step S4107, and the command PZ-LSTATE obtained in step S4047 described above.
Based on the information of the bit B3 of the power zoom lens 51
It is determined whether the zoom position (that is, the focal length) is at the wide end. When it is determined in step S4107 that the zoom position is at the wide end, the process proceeds to step S4109, and the zooming direction is set in the tele direction, that is, the zooming direction is set to zoom toward the tele end, and the control procedure is performed. Ends and returns to the main routine. If it is determined in step S4107 that the zoom position is not at the wide end, the process proceeds to step S4111, and the power zoom lens 51 sets the zoom position to the tele end based on the information of the bit B2 of the command PZ-LSTATE. Determine if there is. If it is determined in this step S4111 that the zoom position is at the wide end, the flow proceeds to step S4113, and the zooming direction is set to the wide direction, that is, the zooming direction is set to zoom toward the wide end, and the control procedure Ends and returns to the main routine.

Here, if it is determined in step S4111 that the zoom position of the power zoom lens 51 is not at the tele end, that is, in relation to step S4107, the zoom position is neither at the tele end nor at the wide end, and both If it is determined that the vehicle is located between the two, step S4
At 115, the bit B3 of the command SET-PZPOINT for informing the lens side of the data to be loaded on the FOCALLEN-X is set to "1",
By instructing the lens side to return the current focal length to the camera body side, and executing the command FOCALLEN-X in subsequent step S4117, the current focal length is actually communicated from the lens side to the camera body side. Become.

In the following step S4119, a command SET-PZ for informing the lens side of the data to be loaded on the FOCALLEN-X is given from the camera body side.
Set the bit B1 of POINT to "1" and instruct the lens side to return the focal length at the wide end to the camera body side.
In the following step S4121, the command FOCA
By executing LLEN-X, the focal length at the wide end is actually communicated from the lens side to the camera body side. Further, in the subsequent step S4123, FO
Command SET-PZPOIN for informing the lens side of the data to be placed on the CALLEN-X from the camera body side
The bit B0 of T is set to "1" to instruct the lens side to return the focal length at the tele end to the camera body side, and in the subsequent step S4125, the command FOCALLEN-
By executing X, the focal length at the telephoto end is actually communicated from the lens side to the camera body side.

After that, in step S4127, a multiplier A smaller than 1 is added to the value obtained by adding the wide-end focal length read in step S4121 and the tele-end focal length read in step S4125 (in this embodiment, in this embodiment). , For example, 1/2) and the result is step S4
It is determined whether or not the present focal length X read in 117 is longer than or equal to X. YES in step S4125.
If it is determined that the current focal length is closer to the tele end than the middle between the tele end and the wide end, the process proceeds to step S4113, and the zooming direction is set to the wide direction, that is, Set the zooming direction so that it zooms toward the wide end. On the other hand, step S41
25, if it is determined to be NO, that is, if the current focal length is determined to be on the wide end side rather than the middle between the tele end and the wide end, the process proceeds to step S4109, and the zooming direction is set to the tele direction. That is, the zooming direction is set so as to zoom toward the tele end.

In the embodiment, when the current zoom position (that is, the focal length) is at the tele end, it is zoomed toward the wide end, and when it is at the wide end, zooming is performed toward the tele end. When the zooming direction is set, and it is judged that there is neither the wide end nor the tele end, if it is on the wide side from the intermediate position, toward the tele end,
Further, the zooming direction is set so that the zooming is performed toward the wide end when the zoom lens is on the tele side from the intermediate position. In this way, in this embodiment, the zooming direction in the inter-exposure zoom is properly defined on the camera side according to the current focal length.

In the above description for setting the zooming direction, the multiplier set in step S4127 is
Although it has been described as 1/2, the present invention is not limited to such a numerical value, and any number smaller than 1 may be used. For example, any value smaller than 1 such as 1/3 may be set. It can be set to a number.

[Modification of Zooming Direction Setting Procedure in Zoom Between Exposures] In the control procedure for setting the zooming direction described above, the current zoom position (that is, the focal length) is set to the wide end or the tele end. If it is not found, set the zooming direction so that it zooms toward the tele end when it is on the wide side from the intermediate position and toward the wide end when it is on the tele side from the intermediate position. However, the present invention is not limited to such a control procedure, and may be configured as shown as a modified example in FIG. 93B. Incidentally, steps having the same contents as the steps in the embodiment described with reference to FIG. 93A are designated by the same reference numerals, and the description thereof will be omitted.

In this modified example, specifically, if it is determined in step S4107 that the current zoom position is not at the wide end, the process proceeds to step S4111 '.
As in the case of the above-described embodiment, the command PZ-LS is used.
Based on the information of the bit B2 of TATE, the power zoom lens 51 determines whether the zoom position is at the tele end. If it is determined in step S4111 'that the zoom position is at the wide end, step S411.
3, the zooming direction is set to the wide direction, that is, the zooming direction is set toward the wide end, the control procedure is ended, and the process returns to the main routine.

On the other hand, when it is determined in step S4111 'that the zoom position of the power zoom lens 51 is not at the tele end, that is, in relation to step S4107, the zoom position is neither at the tele end nor at the wide end, and both If it is determined that the zooming direction is located between the two, unlike the above-described embodiment, the process proceeds to step S4109, and the zooming direction is set to the tele direction, that is, the zooming direction is set so as to zoom toward the tele end. Set, end the control procedure, and return to the main routine.

That is, in this modification, the zooming direction is set to the wide direction only when the current zoom position is at the tele end, and in other cases, that is, the wide end and the tele end are included including the wide end. If there is a current zoom position between them, all are configured to set the zooming direction to the tele direction. In this way, the telescopic zooming direction, which is most often used in the during-exposure zooming, is adopted in principle. However, if all the zooming directions are set to the telescopic direction, the zooming will be performed at the tele end. However, the zoom between exposures is substantially not executed, and only in this case, the zooming direction is set to the wide direction. As a result, the most frequently used inter-exposure zoom can be reliably executed with simple control contents.

[Setting Procedure for Zooming Speed in Zoom Between Exposures] Next, with reference to FIG. 93C, the procedure for setting the zooming speed when executing the zoom between exposures in step S4063 described above will be described in detail as a subroutine of release processing. Explained.

Here, in step S4063, which will be described in detail later, the zooming speed is at least the zoom position at the end of the exposure in consideration of the current focal length, the zooming direction of the inter-exposure zoom, and the shutter speed. Is set in advance so that the state where the zooming operation is not completed is achieved without reaching the tele end or the wide end.

That is, when the zooming operation is completed before the exposure is finished, two image cores (the first image core formed by the exposure in the first half of the exposure time when zooming is not executed and the latter half of the exposure time) are formed in the photographed photographic image. In 2), the second image center formed by the zoom operation ending before the exposure ends is exposed, which is not preferable. Particularly, if the zooming speed in the latter half zooming is set according to the amount of rotation of the zoom operation ring 78, if the photographer rotates the zoom operation ring 78 to the maximum, the zooming speed is set to the maximum speed. Therefore, if the exposure time is set to be long here, the zoom operation may end before the exposure ends, as described above, and two image cores may be projected. However, in this embodiment, the zooming speed is automatically set on the camera side so that two image cores are not formed. It is possible to reliably prevent the two image cores from being projected on the photographed image.

Further, in this embodiment, in order to prevent two image cores from appearing in the photographed image as described above, the zooming speed is changed from the lowest speed of 1 speed to the highest speed of 4 speed. It is set to select in four steps up to. In addition, 4th gear is twice as fast as 3rd gear and 4th gear is 2
The speed is set to three times the speed, and the fourth speed is set to four times the first speed.

First, when the control procedure advances to step S4063, it is determined in step S4201 whether or not the zooming speed is preset. That is, when it is determined that the zooming speed is predetermined by the function setting means (not shown) and is already stored in the E ² PROM, the process proceeds to step S4203, where the E ² PR is set.
The zooming speed stored in the OM is read out, and in the subsequent step S4205, the zooming speed read out in step S4203 is moved. The bit B6 or B7 of the PZMD command is set, the control procedure is terminated, and the process returns to the original main routine. That is, E ² PROM
If the zooming speed stored in is the fastest,
MOVE Bit B6 of the PZMD command is cleared to 0 and bit B7 is cleared to 0. On the other hand, E ² PROM
If the zooming speed stored in is the lowest,
MOVE Bit B6 of the PZMD command is set to 1 and bit B7 is set to 1. As a result, when performing the zoom between exposures, the above-described step S40 is performed.
By executing 63, the zooming speed set in step S4205 is set, and power zooming is performed at the set zooming speed.

On the other hand, if it is determined in step S4201 that the zooming speed has not been set in advance, the process advances to step S4207, and the zooming direction set in step S4059 described above is either the tele direction or the wide direction. Determine if there is. This step S
If it is determined in 4207 that the zooming direction is the tele direction, the process advances to step S4209 to execute the command PZTIME-XTOT. This command P
ZTIME-XTOT is a command for reading the driving time when power zooming is performed from the current zoom position to the tele end at the highest speed of the fourth speed. On the other hand, if it is determined in step S4207 that the zooming direction is the wide direction, then the flow proceeds to step S4211.
Execute the command PZTIME-XTOW. This command PZTIME-XTOW is a command for reading the drive time when power zooming is performed from the current zoom position to the wide end at the highest speed of the fourth speed. still,
These commands PZTIME-XTOT and PZTIM
The E-XTOW will be specifically described later as a subroutine.

[0412] In this way, in step S4209 or step S4211, after the driving times corresponding to the respective zooming directions are read out, the flow proceeds to step S4213.
The read drive time is the same as the above-described step S406.
It is determined whether the time set in 1 is longer than the zooming time for executing the inter-exposure zoom. This step S
If it is determined at 4213 that the drive time is longer than the zooming time, the process proceeds to step S4215, the zooming speed is set to the highest speed, that is, the fourth speed, the control procedure is terminated, and the process returns to the main routine. That is, for example, even if the zooming speed is set to the highest speed, that is, the fourth speed, the zoom motor 65 is actually driven more than the time (zooming time) during which zooming is performed within the exposure time in the zoom between exposures. Since the time becomes longer than the time (driving time), at least the zooming operation is continued to be executed at the time when the inter-exposure zoom is completed. It is possible to reliably prevent two image cores from being projected without projecting only one image core.

On the other hand, if it is determined in step S4213 described above that the drive time is not longer than the zooming time, the flow advances to step S4217 to determine whether the value obtained by doubling the drive time is longer than the zooming time. Determine whether or not. If YES is determined in this step S4217, that is, if the driving time itself is not longer than the zooming time but twice the driving time is longer than the zooming time, the step S4 is performed.
In step 4219, the zooming speed is set to the third speed which is 1/2 of the maximum speed, the control procedure is ended, and the process returns to the main routine.

That is, when the zooming speed is set to the highest speed, that is, the fourth speed, the time period during which the zoom motor 65 is driven within the time period (zooming time period) during which zooming is performed within the exposure time period during zooming during exposure. (Driving time) ends and two image cores are formed,
When the zooming speed is reduced to the third speed, the zoom motor 65 is actually longer than the time (zooming time) during which zooming is performed within the exposure time in the zoom between exposures.
Is longer than the driving time (driving time), so at the end of the inter-exposure zoom, at least the zooming operation is continued to be executed, and therefore,
As described above, it is possible to reliably prevent only two image cores from being projected on the photographed image, and two image cores from being projected.

If it is determined in step S4217 described above that the time that is twice the drive time is not longer than the zooming time, the flow advances to step S4221, where the value obtained by multiplying the drive time by three is the zooming time. Judge whether it is longer than time. If YES is determined in this step S4221, that is, if the time obtained by doubling the driving time is not longer than the zooming time, but it is determined that the time three times the driving time is longer than the zooming time, The process advances to step S4223, the zooming speed is set to the second speed which is 1/3 of the maximum speed, the control procedure is ended, and the process returns to the main routine.

That is, when the zooming speed is set to the third speed, the time (driving time) during which the zoom motor 65 is driven within the time (zooming time) during which zooming is executed within the exposure time in the inter-exposure zoom. Ends, and two image cores are formed, but when the zooming speed is slowed down to the second speed, the actual zooming time is longer than the time (zooming time) during which the zooming is performed within the exposure time in the zoom between exposures. In addition, since it becomes longer than the time (driving time) for driving the zoom motor 65, at least the zooming operation is continued to be executed at the time when the inter-exposure zoom is completed. Therefore, as described above, As a result, it is possible to reliably prevent only two image cores from being projected in the photographed image, and two image cores from being projected.

On the other hand, if it is determined in step S4221 that the time three times the driving time is not longer than the zooming time, the process proceeds to step S4225, where the zooming speed is set to 1/4 of the maximum speed. A certain minimum speed is set to the first speed, the control procedure is terminated, and the process returns to the main routine. That is, when the zooming speed is set to the second speed, the time (driving time) for driving the zoom motor 65 ends within the time (zooming time) during which zooming is performed within the exposure time in the inter-exposure zoom. 2
Although two image cores are formed, if the zooming speed is slowed down to the minimum speed of 1st, the actual zooming time will be shorter than the time (zooming time) during which zooming is performed within the exposure time during zooming between exposures. Since it becomes longer than the time (driving time) for which the motor 65 is driven, at least the zooming operation is continued to be executed at the end of the inter-exposure zoom. Therefore, as described above, the photographing operation is performed. It is possible to reliably prevent two image cores from being projected on the captured photographic image because only one image core is projected.

As described above in detail, by configuring the control procedure for setting the zooming speed at the time of zooming during exposure in this embodiment, no matter what zooming speed is set, the zoom mode during exposure can be set. It is possible to reliably prevent two image cores from being projected, since only one image core is projected in the photographed image.

[Procedure for Executing Command PZTIME-XTOT] Here, referring to FIG. 93D, the power lens 51 side when the command PZTIME-XTOT is output from the CPU 35 on the camera body 11 side in step S4209 described above. The execution procedure of the CPU 61 will be specifically described. First, when this command PZTIME-XTOT is output from the CPU 35 on the camera body 11 side, a command reception completion signal is output (returned) to the CPU 35 on the camera body 11 side in step S4301 and step S4301.
At 4303, the current zooming position (focal length)
Outputs travel time data when the vehicle travels at the highest speed from the 4th to the tele end. After that, in step S4305, a data transmission completion signal is output, and in step S4307.
At, the communication interrupt is permitted and the process returns to the original routine.

[Execution procedure of command PZTIME-XTOW] On the other hand, at step S4211, the command P is executed.
ZTIME-XTOW is the CPU 3 on the camera body 11 side.
CPU 6 on the side of the power lens 51 when output from 5
The execution procedure of No. 1 will be specifically described with reference to FIG. 93E. First, when this command PZTIME-XTOW is output from the CPU 35 on the camera body 11 side, a command reception completion signal is output (returned) to the CPU 35 on the camera body 11 side in step S4311, and then step S43.
At 4313, the current zooming position (focal length)
Outputs travel time data when the vehicle travels from the 4th to the wide end at the highest speed. After this, in step S4315, a data transmission completion signal is output, and in step S431
At 7, the communication interrupt is permitted and the process returns to the original routine.

[PZ Mode Switching Process] The power zoom (PZ) mode switching process in the camera body 11 shown in FIG. 94 will be described. This PZ mode switching process is performed by S15 in the PZ loop process shown in FIG. 60A.
When the zoom set button 77 of the taking lens 51 is operated in a predetermined manner, the PZ mode changing process is executed. The present embodiment has five types of zoom modes including manual zoom or manual power zoom, constant image magnification zoom, preset zoom, preset zoom set, and inter-exposure zoom. In this flowchart, the numbers for each mode are assigned, NO.0 is the manual zoom or manual power zoom mode, NO.1 is the constant image magnification zoom mode, NO.2 is the preset zoom mode, and NO.3 is the preset zoom set. Mode and N
O.4 is the zoom mode during exposure.

First, it is checked whether the attached photographing lens is the power zoom lens, the manual zoom mode or the electric zoom mode, and if the power zoom lens is the manual power zoom (electric zoom) or the automatic power zoom, If it is not the power zoom lens, the power zoom and the auto power zoom, the power zoom mode flag is cleared, this state is saved, and then the process returns (S3001, S3035, S3039).

If it is an auto power zoom lens, the mode already saved is restored. Nothing is done in the auto focus mode, but if the auto focus is not set, constant image magnification zoom cannot be performed.
If the Z mode is the constant image magnification zoom mode (1), the PZ mode is changed up, and if not, it is left unchanged (S300
9-S3013).

Next, on condition that the AS switch (zoom mode change switch) of the power zoom lens 51 is turned on, the PZ mode is changed when the up and down switches SWUP and DN of the camera body 11 are turned on. Processing is performed (S3015 to S3029). For example, when the down switch SWDN is turned on, the up processing is performed until the zoom mode NO. Becomes 4 (S301).
7, S3031, S3033). Up switch SWU
When P is turned on, the down processing is performed until the zoom mode NO. Becomes 1. However, when the autofocus mode is not set, the constant image magnification zoom is not selected (S301).
9-S3029).

When the above UP / DOWN processing is completed, the selected zoom mode No. is saved and the processing returns (S303).
9). The state of the switch SWAS is POFF-S.
It is included in the data input by TATE communication.

[PZ pulse count interrupt process] P shown in FIGS. 95 and 96, which is executed on the side of the taking lens 51.
The Z pulse count interrupt processing will be described. This interrupt processing is performed at the rising edge of the PZ pulse output, and the PZ pulses are counted by software. The lens C
Depending on the setting of PU, the interrupt may come in at the falling edge.

First, a PZ counter (PZPA2B) for prohibiting interrupts and counting PZ pulses during PZ initialization processing, and a PZ pulse count value (PZ
(PCNT) is incremented by 1, and when the value of the PZ pulse counter overflows, the maximum value is put in the PZ pulse count value (S3101 to S3109).

Next, the driving direction of the power zoom is checked. In the tele direction, the PZ pulse count start value is added to the PZ pulse count value to enter the current PZ pulse value. In the wide direction, the PZ pulse count start value is changed to the PZ pulse count start value. The pulse count value is subtracted and added to the current PZ pulse value (S3111 to S3115).

Then, if the drive is not in progress (F_DRV =
0), and proceeds to PWM control check (CHKPWM) processing (S3117). Drive is in progress, but if the drive is not constant image magnification zoom or drive to target position, P
Proceed to WM control check (CHKPWM) processing (S31
17-S3121). If the current image PZ pulse number and the target PZ pulse number are not equal when driving with the constant image magnification zoom or driving to the target position, P
The process proceeds to the WM control check (CHKPWM) process, but if they are equal, the process immediately proceeds to the brake (BREAK) process to stop the zoom motor (S3117, S3119,
S3123).

[BRAK, CHKPWM Process] FIG. 96 shows a flowchart relating to the brake process (BRAK process) of the zoom motor and the PWM check process. This process is a process of suppressing the rotation speed of the PZ motor.

In the brake processing, first the brake is applied to the zoom motor (the input terminal of the zoom motor is closed), and the brake data (F_BRK is set in the ZM-ST1, the flags F_LMTT and F_LMTW remain unchanged, and the others are cleared). (S3151, S3153). Then, the PWM timer, the limit timer, and the start timer are cleared, the current focal length data is obtained from the current PZ pulse value (PZPX), stored in FCLXL, H, the interrupt is permitted, and the process returns (S3155 to S3159).

The CHKPWM process is a process for lowering the duty ratio in PWM control. If it is not in the PWM drive, the process proceeds to S3155 as it is at the fourth speed (DC).
If the WM drive is in progress, the PWM pulse cycle (T-PWMP
LS) and PWM timer (T-PWM) are compared, PWM
When the PWM timer is small due to the pulse cycle, the power zoom speed is too fast, so the duty ratio is lowered before proceeding to S3155, and when the PWM timer is larger than the PWM pulse cycle, the routine proceeds directly to S3155 (S3155).
161-S3165). As described above, a large number of functions have been described in this embodiment, but all of them can be mounted in a single camera system (camera body and photographing lens), but of course only a part may be mounted. .

As described above, in the power zoom single-lens reflex camera of this embodiment, the positions of the zooming lens group 53Z and the focusing lens group 53F are the absolute positions of the code plate, the rotation amount of the zoom motor 65 for driving them, and the camera body 11. Since it is detected by the rotation amount (PZ pulse number, AF pulse number) of the internal AF motor 39,
Highly accurate position detection becomes possible. Moreover, in this embodiment,
In addition to making corrections when the zooming lens group 53Z reaches the telephoto end and the wide-angle end and when the focusing lens group 53F reaches the infinity shooting end and the close-up shooting end, the zoom code plate is used for detecting the focal length. PZ pulse count value correction processing is performed each time each switching point 72 of the code on 71 is detected, and AF pulse count is performed each time one of the plurality of indexes 83 on the distance code plate 81 is detected when the subject distance is detected. Since the value correction process is performed, it is possible to detect the focal length and subject distance with high accuracy.
Since the power zoom single-lens reflex camera can detect the focal length and the subject distance with precision, more accurate image magnification constant control and control power zoom such as preset zoom become possible.

Further, the power zoom lens 51 of the present embodiment.
Has a built-in lens CPU 61.
Since the detection processing of the focal length and the subject distance is controlled by 61 and a predetermined calculation is executed, various calculation processing relating to an accurate and complicated control power zoom can be executed with high accuracy in a short time.

Further, as described above, the single-lens reflex camera equipped with the power zoom lens is set when the half-exposure time has elapsed with the zoom between exposures set (or,
During the first half of the exposure time), the zoom motor 65 is activated to start zooming up or zooming back, so that a clear still subject image and a subject image that expands or contracts radially from this still subject image. Will be projected.

In this way, according to this embodiment, the zooming direction of zoom-up (tele direction) or zoom-back (wide direction) is defined by the CPU 35 on the body side based on the current focal length. Therefore, the zooming operation is surely executed, and the zoom between exposures is surely achieved. In this way, the photographer does not need to consider the zooming direction in the inter-exposure zoom and set it in the camera, and the inter-exposure zoom photography, which is a high-level photography technique, can be executed very easily. Become. In addition, a setting member for setting the zooming direction is unnecessary, and the cost can be reduced. Further, since it is possible to prevent the photographer from accidentally setting the zooming direction, it is possible to effectively prevent the occurrence of a photographing error in the during-exposure zoom photographing.

Further, in the above-described embodiment, the zoom operation ring 78 is rotated clockwise or counterclockwise from the neutral position at the time of shutter release in the state where the during-exposure zoom mode is set, and the power zoom switch is turned on. When it is turned on, it is set to execute the during-exposure zoom operation by the manual power zooming without executing the normal during-exposure zoom operation by the auto power zooming. As a result, it is not necessary to perform the inter-exposure zoom in the setting conditions of the inter-exposure zoom set on the camera side, for example, the zooming direction, the zooming speed, etc. Even if the photographer wants to do so, the zooming direction is defined by the rotation direction of the zoom operation ring 78, and the zooming speed is defined by the rotation amount of the zoom operation ring 78. It is possible to implement the reflected zoom during exposure.

Further, in the above-described embodiment, in the state where the inter-exposure zoom is set, the zoom speed is set on the camera side by the shutter speed (that is, the exposure time), the set current focal length, and the zoom speed. In consideration of the zooming direction and the like, the zooming operation is set not to end at least when the exposure time ends. As a result, it is possible to effectively suppress the failure of the captured photographic image in the in-exposure zoom mode having two cores (still images), and to display a good inter-exposure zoom image in which only one core exists. Become.

Further, in the above-described embodiment, the manual power zoom is set to be allowed when the shutter speed is set to the valve (open) in the state where the inter-exposure zoom is set. There is. As a result, in the past, when the bulb was set, the zoom between exposures was prohibited because the exposure time was unknown.
By allowing manual power zoom, for example,
Even if the exposure time is unknown because the bulb is set, it is possible to perform the inter-exposure zoom by executing the manual power zoom using part of the exposure time under the intention of the photographer. Become.

Further, in the above-described embodiment, the manual power zoom is set to be allowed by rotationally driving the zoom operation ring 78 during the exposure operation while the zoom between exposures is set. ing. As a result, the inter-exposure zoom can be performed by the manual power zoom based on the condition according to the photographer's intention, instead of the inter-exposure zoom by the automatic power zoom based on the condition set on the camera side.

Further, in the above-described embodiment, the zoom operation ring 7 is operated without pressing the shutter button halfway.
It is set so that the focusing operation is automatically performed when the focal length is changed (zoomed) by rotating the lens 8. As a result, when so-called framing is performed while zooming while looking at the viewfinder, the subject image that can be seen from the finder is always in focus, and this framing operation can be performed well. .

Further, in the above-described embodiment, the zoom operation ring 7 is operated without pressing the shutter button halfway.
Focusing operation will be performed during zooming by rotating 8; however, in the focusing operation at that time, the shutter width is half-pressed and the photometric switch is turned on. It is set wider than the focus width in the case of the focus operation by. As a result, a delicate operation during AF is suppressed and annoyance is reduced.

Further, in the above-described embodiment, in the image magnification setting mode, the zoom operation ring 78 is rotated to set a desired focal length, and the zoom set button is pressed in this state to perform the focusing operation. When the focusing operation is completed, the image magnification is calculated based on the distance to the subject at the time of completion of the focusing operation and the set focal length, and the calculated value is stored in the memory. As a result, it becomes possible to easily set the image magnification, and shooting with a constant image magnification, which was conventionally a sophisticated shooting technique,
Anyone can do it easily.

Here, the above-mentioned image magnification setting operation is not limited to the above-mentioned operation procedure, for example, when the zoom operation ring is elastically returned to the neutral position without pressing the zoom set button, the focus is adjusted. The operation may be started and the same operation may be executed thereafter. With this configuration, the zoom set button is not required when setting the image magnification, and the number of parts can be reduced.

Further, in the single-lens reflex camera equipped with the power zoom lens of the above-described one embodiment, when the preset zoom set mode is selected, the focal length at that point in time when the zoom set button is turned on is preset focus. Since it is stored as a distance, and when it is memorized, the mode is changed to the preset zoom mode, so when the zoom set button is next turned on, the power zoom is performed up to the preset focal length. Therefore, the photographer can easily change the focal length stored in the memory by storing the focal length that is frequently used even when the focal length is changed to another focal length.

Further, in the above-described embodiment, when the preset zoom mode is executed, by pressing the zoom set button, the focal length is zoomed to the stored focal length and the focusing operation is executed. ing. As a result, an easy-to-use preset zoom mode (clip mode) is achieved.

In this embodiment, the AF motor 39 is mounted on the camera body 11 and the zoom motor 65 is mounted on the taking lens 51. However, in the present invention, both motors are mounted on the camera body 1.
On the contrary, even if it is mounted on the photographing lens 51
The motor may be mounted on the taking lens and the zoom motor may be mounted on the camera body. Further, although the structure of the code plates 71 and 81 for detecting the absolute position of the lens group is different for the focal length detection and the object distance detection, which structure of the code plates is used is arbitrary. Either one may be used.

Further, in the single-lens reflex camera equipped with the power zoom of this embodiment, the zoom motor 69 under PWM control is used.
Since the end point detection time is variable (shorter at higher speeds) depending on the rotation speed of the, the overload of the zoom motor 69 is reduced when the end point is reached at high speeds, and the energization time is set to the maximum (driving torque maximum) at low speeds. Since the end point is detected even when the end point still does not rotate, the end point can be surely detected.

In the single-lens reflex camera of the present embodiment, the zoom lens 51 is equipped with the electric means (zoom motor 69) and the lens control means (lens CPU 61) for controlling the electric means, and is different from the body control means (body CPU 35). The drive control of the electric means can be independently performed. Therefore, in parallel with the automatic focus adjustment processing by the body control means,
It became possible to quickly handle complicated control using the power zoom. In the present embodiment, in the constant image magnification zoom, while the body CPU 35 executes the automatic focusing process, the lens CPU 61 can calculate the image magnification and perform power zoom up to the focal length. Moreover, the lens CPU
Since 61 performs calculation and control processing independently of the body CPU 35, quick control operation is possible.

In this embodiment, in the preset zoom set mode, the lens CPU 61 is the body CPU 35.
From the lens memory means (lens RAM 61) when the zoom set button is turned on.
b), and the focal length data is stored in the body C.
It transmits to PU35. The body CPU 35 that has received the focal length data shifts from the preset zoom set mode to the preset zoom mode, and transmits data regarding the preset zoom mode state to the lens CPU 61. When the zoom set button is turned on, the lens CPU 61 that has received this mode data will move the lens RAM 6
The zoom motor 69 is driven to the focal length stored in 1b. In this way, the lens CPU 61 and the body CPU 3
Since 5 and 5 communicate with each other and execute parallel processing in cooperation with each other, complicated processing can be executed quickly.

The main CPU 35 uses the zoom motor 6
When activating 5, the battery power is checked to see if it is being supplied normally by communication with the lens CPU 61. If it is not being supplied normally, some trouble has occurred, so the supply is cut off and trouble is taken. To prevent. The main CPU 35 also uses the lens C when there is no operation related to shooting for a predetermined time.
Since the standby command is transmitted to the PU 69 to stop the clock, useless energy consumption is prevented.

In the present embodiment, the battery is mounted on the camera body to supply power to the lens, but conversely, the battery may be mounted on the lens to supply power to the body. Further, the present invention is not limited to a camera, and can be applied to general devices including a power feeding device and a power fed device.

When the preset zoom set mode is selected, the single lens reflex camera equipped with the power zoom lens of this embodiment stores the focal length at that point in time as the preset focal length when the zoom set button is turned on. When the memory is stored, the mode is changed to the preset zoom mode. Therefore, when the zoom set button is turned on next time, the power zoom is performed up to the preset focal length. Therefore, the photographer can easily change the focal length stored in the memory by storing the focal length that is frequently used even when the focal length is changed to another focal length.

Further, the power zoom lens 51 of the present embodiment.
When the main switch of the body 11 is turned off, the power to the lens 51 is turned off. Therefore, when the preset focal length is stored in the lens RAM 61b, the preset focal length is transferred to the camera body 11 and the body RAM 35b. To memory. When the main switch is turned on, the preset focal length stored in the body RAM 35b is transferred to the power zoom lens 51 and stored in the lens RAM 61b to enable preset zoom.

The power zoom lens 51 has a structure in which the camera body 1 is operated when the main switch of the body 11 is turned off.
In response to the PZ storage command from 1, the lens ZCPU65
Activates the zoom motor 69 to power zoom to the focal length where the lens barrel becomes the shortest. Therefore, the photographer
When not shooting, just turn off the main switch,
The lens barrel can be easily made compact. When the PZ is stored, the body 11 does not have the power zoom lens 5
Since the AF motor 39 drives the first focusing lens group 53F to the position where the lens barrel becomes the shortest (infinity position), the power zoom lens 51 has the shortest overall length.

The current focal length data at the time of storing the zoom is transferred to the camera body 11 by new communication and stored in the body RAM 35b. This current focal length data is transferred to the power zoom lens 51 by new communication when the main switch is turned on, and the lens RAM 65
It is stored in b. Then, the lens CPU 65 drives the zoom motor 69 up to the transferred current focal length data. By this processing, the power zoom lens 51 returns to the state before storage.

In the single-lens reflex camera equipped with the power zoom lens of the present embodiment, during constant image magnification control, the power zoom control is performed by obtaining the image magnification and the target focal length based on the extension amount of the focusing lens group, and therefore the calculation is performed. It's easy. Moreover, since it follows only the movement of the focusing lens group, there is no unstable element in the lens driving operation, and stable and stable image magnification constant zoom control is possible.

When the image magnification is out of focus, the image magnification and the target focal length are calculated based on the defocus amount. When the image is in focus, the image magnification and the target focal length are calculated based on the focus lens extension amount. Is calculated, more accurate constant image magnification control becomes possible.

Further, since the zooming speed is changed according to the exposure time, effective inter-exposure zooming can be performed from an ultra-low shutter speed to a medium or high shutter speed. In particular,
At low shutter speeds, low-speed zooming makes it possible to continue zooming until the end of exposure, and at medium and high shutter speeds, maximum zooming allows effective inter-exposure zoom.

In the above-described embodiment, the power zoom lens having the zoom motor 65 built therein is used as the taking lens 51. However, the present invention is not limited to such a configuration, and the zoom lens is not limited thereto. It goes without saying that the manual zoom lens without a motor may be used.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing a configuration of a single-lens reflex camera to which an embodiment of a camera having an electric zoom function according to the present invention is applied.

2A is a block diagram schematically showing a configuration of a power zoom lens of the single-lens reflex camera shown in FIG. 1. FIG.

FIG. 2B is a perspective view schematically showing the outer appearance of the power zoom lens of the single-lens reflex camera shown in FIG. 2A.

FIG. 3 is a block diagram showing an example of a circuit configuration of the power zoom lens shown in FIG.

4 is a development view of a zoom code plate of the power zoom lens shown in FIG.

5 is a development view of a focal length code plate of the power zoom lens shown in FIG.

[FIG. 6]

FIG. 7 is a main flowchart of a lens CPU.

FIG. 8 is a flowchart relating to a communication interrupt process of the lens CPU.

FIG. 9 is a flowchart regarding a 2 ms timer interrupt.

FIG. 10 is a flowchart relating to power zoom and manual zoom processing.

FIG. 11 is a flowchart for a PWM 2ms timer interrupt.

FIG. 12 is a flowchart relating to PZ pulse count interrupt processing.

FIG. 13 is a flowchart regarding a PWM interrupt.

FIG. 14 is a time chart regarding PWM control.

FIG. 15:

FIG. 16 is a flowchart regarding constant image magnification zoom control.

FIG. 17:

FIG. 18 is a flowchart relating to predictor operation processing.

FIG. 19 is a flowchart regarding standby processing.

FIG. 20 is a flowchart of AF pulse initialization processing.

FIG. 21 is a flowchart relating to power zoom position initialization processing.

FIG. 22 is a flowchart relating to a power zoom lens storage process.

FIG. 23 is a flowchart of a power zoom lens return process.

FIG. 24 is a flowchart of a power zoom stop process.

FIG. 25 is a flowchart when data necessary for constant image magnification zoom is received.

FIG. 26 is a flowchart relating to constant image magnification zoom processing.

[Fig. 27] Fig. 27 is a flowchart when information regarding constant image magnification zoom is input.

FIG. 28 is a flowchart regarding processing when information about the state of the camera body is input.

FIG. 29 is a flowchart when body sequence information is input.

FIG. 30 is a flowchart when an AF pulse is input from the camera body side.

FIG. 31 is a flowchart when a PZ pulse is input from the camera body side.

FIG. 32 is a flowchart regarding processing when a command to store the AF pulse data counted in the lens is received.

FIG. 33 is a flowchart of processing for storing a defocus amount obtained by AF on the body side in a lens memory.

FIG. 34 is a flowchart relating to memory processing of designated PZ pulse data and focal length data.

FIG. 35 is a flowchart of processing for storing the defocus amount obtained by AF on the body side in the lens memory.

FIG. 36 is a flowchart relating to memory processing of constant image magnification zoom data received from a camera body.

FIG. 37 is a flowchart relating to power zooming processing to a designated direction or a designated position.

FIG. 38 is a flowchart regarding a power zoom process based on data designated by a camera body.

FIG. 39:

FIG. 40:

FIG. 41

FIG. 42:

FIG. 43 is a lens flowchart relating to AF pulse count processing.

[Fig. 44] Fig. 44 is a flowchart regarding a transmission process of data related to power zoom on the photographing lens side.

FIG. 45 is a flowchart relating to standby processing and the like of the taking lens.

FIG. 46 is a flowchart relating to variable data transmission processing of a photographing lens.

FIG. 47 is a flowchart relating to fixed information transmission processing of the taking lens.

FIG. 48 is a flowchart of AF pulse count value transmission processing on the lens side.

FIG. 49 is a flowchart regarding output processing of current focal length data of a photographing lens.

[Fig. 50] Fig. 50 is a flowchart relating to zoom image constant zoom data transmission processing on the photographing lens side.

FIG. 51 is a flowchart relating to all data output processing of a lens.

FIG. 52

FIG. 53A]

FIG. 53B]

FIG. 54

FIG. 55 is a flowchart relating to the PZ operation processing principle.

FIG. 56 is a flowchart relating to PZ initialization processing.

FIG. 57:

FIG. 58 is a flowchart of AF initialization processing.

FIG. 59 is a flowchart of a power supply check process.

FIG. 60A]

FIG. 60B]

FIG. 61A is a flowchart relating to PZ loop processing.

FIG. 61B is a flowchart relating to a modified example of the PZ loop processing.

[Fig. 62] Fig. 62 is a flowchart relating to preset power zoom end check processing.

FIG. 63:

[Fig. 64] Fig. 64 is a flowchart of a first example of a constant image magnification zoom.

FIG. 65:

FIG. 66 is a flowchart of a second example of constant image magnification zooming.

FIG. 67:

FIG. 68 is a flowchart of the third example of the constant image magnification zoom;

FIG. 69 is a flowchart of AF pulse count processing.

FIG. 70 is a flowchart relating to AF pulse count value adjustment processing.

FIG. 71 is a flowchart relating to PZ end point processing.

[Fig. 72] Fig. 72 is a flowchart relating to rotation direction and rotation speed control of the zoom motor.

FIG. 73:

FIG. 74:

[Fig. 75] Fig. 75 is a flowchart regarding a power zoom operation by a zoom switch.

FIG. 76 is a flowchart showing PZ pulse count interrupt processing.

[Fig. 77] Fig. 77 is a flowchart relating to power zoom stop processing.

[Fig. 78] Fig. 78 is a flowchart regarding a brake process of the zoom motor.

FIG. 79:

[Fig. 80] Fig. 80 is a flowchart relating to setting processing of a photographing lens state.

FIG. 81:

[Fig. 82] Fig. 82 is a flowchart relating to power zoom processing to a designated focal length.

FIG. 83:

FIG. 84 is a flowchart relating to drive speed adjustment processing according to the number of pulses up to a target position.

FIG. 85 is a flowchart relating to PZ pulse count correction processing when the end point is reached.

FIG. 86

FIG. 87 is a flowchart regarding PZ pulse counter correction processing when the current zooming lens position is unknown.

FIG. 88 is a flowchart relating to PZ pulse count processing when the current position is known.

FIG. 89 is a flowchart of PZ pulse counter correction processing.

FIG. 90 is a flowchart relating to preset focal length preset processing.

[Fig. 91] Fig. 91 is a flowchart relating to drive control of the zoom motor.

92A],

FIG. 92B]

FIG. 92C is a flowchart of release processing in the camera body.

FIG. 93A is a flowchart showing a setting procedure in the zooming direction.

FIG. 93B is a flowchart showing a modification of the setting procedure in the zooming direction.

FIG. 93C is a flowchart showing a procedure for setting a zooming speed.

FIG. 93D is a flowchart showing an execution procedure of a command PZTIME-XTOT.

FIG. 93E is a flowchart showing an execution procedure of a command PZTIME-XTOW.

[Fig. 94] Fig. 94 is a flowchart of a power zoom mode switching process.

FIG. 95 is a flowchart relating to PZ pulse count interrupt processing.

FIG. 96 is a flowchart relating to PWM control processing for the zoom motor.

[Explanation of symbols]

 11 camera body 20 battery 21 distance measuring CCD sensor unit 23 peripheral control circuit 35 main (body) CPU 35b RAM 37 motor drive IC 39 AF motor 41 encoder 51 shooting lens (power zoom lens) 51F focusing lens group 51Z zooming lens group 55 AF mechanism 59 AF pulser 61 Lens CPU 61b Lens RAM 62 Interface 63 Motor drive IC 65 Zoom motor 67 PZ mechanism 69 PZ pulser 71 Zoom (focal length) code plate 72 Switching point 81 Distance code plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Tsuji 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Kogaku Kogyo Co., Ltd. (72) Tetsuo Hosokawa 2-36-9 Maenocho, Itabashi-ku, Tokyo No. Asahi Kogaku Industry Co., Ltd.

Claims (4)

[Claims] 1. A camera body, a zoom lens attached to the camera body, a focal length setting member for changing and setting the focal length of the zoom lens, and a subject image formed by the camera body. Focusing means for automatically focusing, and control means for causing the focusing means to perform a focusing operation while the focal length is changed via the focal length setting member. A camera with a zoom function. 2. A camera body, a zoom lens attached to the camera body, a focal length setting member for changing and setting a focal length of the zoom lens, and a subject image formed by the camera body. A focusing means for automatically focusing and a control means for causing the focusing means to start a focusing operation when the focal length is changed via the focal length setting member. A camera with a zoom function. 3. The focal length setting member includes a zoom ring, which is attached to an outer periphery of a zoom lens so as to be rotatable about an optical axis, and changes the focal length by being rotated. A camera having a zoom function according to claim 1. 4. The camera having a zoom function according to claim 1, wherein the zoom lens is an electric zoom lens driven by a built-in motor.