JPH0843875A - Lens interchangeable camera system - Google Patents

Abstract

PURPOSE:To provide a camera system having improved operability and also capable of preventing the unnecessary consumption of a battery. CONSTITUTION:When a body is in a standstill state, only a low voltage power VLEL. of an in-lens control means 101 is supplied by a power supplying means 103. When an operating member 105 is actuated on a lens side so as to command the lens drive, a signal for starting an in-body control means 104 is transmitted to a body side by a starting means 106, and the in-body control means 104 is started, and also, a high voltage power VLEH is supplied by the power supplying means 103 to a lens driving means 102 in the lens. Thus, the unnecessary consumption of the battery is prevented while improving the operability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interchangeable lens type camera system which has good operability and can prevent wasteful battery consumption.

[0002]

2. Description of the Related Art Conventionally, in a camera equipped with a microcomputer for control, when the camera is not operated, the operation of the microcomputer (execution of a program) is temporarily stopped to save power, or a camera including the microcomputer. The power supply to the control circuit was temporarily stopped. Then, by operating the release button, the rewind button, etc., the microcomputer is started and power is supplied to the camera control circuit to start the operation. As a conventional example in which the camera body is activated by an operation on the accessory side, for example, Japanese Patent Laid-Open No. 62-115.
141 and Japanese Patent Laid-Open No. 62-115135.

First, in JP-A-62-115141,
A technique is disclosed that activates the camera body by manually operating an accessory (a back circuit that is replaced with the back cover of the camera), and when an up / down key is operated, an activation signal is sent to the camera side. Is proposed. Further, Japanese Patent Laid-Open No. 62-115135 proposes that when an information setting means (irradiation angle changing switch, etc.) provided on the flash is operated, a start signal is output to the camera body side to start the body. Has been done.

[0004]

On the other hand, in the interchangeable lens type camera, auto focus (A
With the increase in functions such as F) and power zoom, various operating members have been provided on the interchangeable lens side. Therefore, in a camera that operates the camera-side operation member to start the microcomputer and supply power to the camera control circuit, the camera-body operation member is operated to operate the lens-side operation. It was necessary to operate the lens side after activating the lens side, and the operability was not very good. Therefore, it is possible to improve the operability by starting the camera body by operating the interchangeable lens, but the power of the interchangeable lens is supplied from the camera side, and it is necessary to drive the lens to the lens side. If there is a motor, the power supply for the motor has a higher output (needs more power) than the power supply for the microcomputer, and if the power supply for the motor is always supplied, the battery will be consumed more quickly.

The present invention has been made in view of the above points, and an object of the present invention is to provide a camera system which has good operability and can prevent unnecessary battery consumption. It is in.

[0006]

According to the invention of claim 1,
In order to solve the above problems, as shown in FIG.
Interchangeable lens LE and multiple lenses between lens and camera
Air contact, through which various information can be communicated and turtles
Camera body BD that supplies power from the lens to the lens
In the camera system consisting of,
Power supply V to 1_LEL And a power supply V to the lens driving means 102
_LEH To the lens provided in the camera body that supplies
The power supply means 103 and the camera body
In the stopped state, only power is supplied to the in-lens control means 101.
In-body control means 1 for controlling the operation of the camera so that
04, which is provided on the lens to instruct the lens drive
The operation member 105 and the in-body control means 104 are stopped.
When the operation member 105 is operated in the stopped state,
A signal for activating the in-body control means 104 is sent to the body.
In the above body,
Upon receiving the activation signal, the control unit 104 drives the lens.
Characterized in that power is supplied to the means 102.
is there.

Further, the camera body BD is provided with a booster circuit DD ₁ for supplying power to the circuit of the camera, and when a signal from the starting means 106 is received when boosting is stopped, the booster circuit DD ₁ is supplied based on the signal. It is preferable that ₁ starts operation.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiment of the present invention will be described below with reference to FIG.
The form will be described. The camera system of the present invention is stopped
When in the state, inside the body provided inside the camera body
The control means 104 supplies power to the in-lens control means 101.
Control the operation of the camera to supply only Camera
The power supply means 103 to the lens provided in the display is
At this time, under the control of the in-body control means 104, the lens
Power supply V to the internal control means 101 _LEL Supply only
Power to the lens driving means 102_LEH Is supplying
Absent. Therefore, the transition in the power supply means 103
Star BT₁ Is in the off state,
Does not happen. From this stopped state, the operation provided on the lens
When the member 105 is operated and the lens driving is instructed,
The in-body control means 104 is activated by the activation means 106.
A signal for causing the body to be transmitted is transmitted to the body side. Lens and turtle
A plurality of electrical contacts are provided between the two
Various kinds of information are communicated through this. Also, through this contact
Then, power is supplied from the camera to the lens. body
The internal control means 104 receives the activation signal from the lens side.
Power to the lens driving means 102.
The source supply means 103 is controlled. This drives the lens
Power supply V to means 102_LEH Is supplied.

As described above, according to the present invention, when the body is stopped, only the power source V _LEL of the in-lens control means 101 is fed to drive the lens on the lens side. At the same time as starting, the power supply V _LEH is supplied to the lens driving means 102 in the lens. As a result, it is possible to improve the operability and prevent unnecessary battery consumption.

[0010]

An embodiment of the present invention will be described below.
2 shows the appearance of a camera body BD to which the present invention is applied, and FIG. 3 shows the appearance of an interchangeable lens LE mounted on the camera body BD. The names and functions of each part will be described below.

Reference numeral 1 denotes a main switch. When the main switch 1 is turned on, the camera body BD is in an operable state, and when it is off, the camera body BD is in an inoperable state.

Reference numeral 2 denotes a function key. Every time the function key 2 is pressed, the function of the lens key 25 provided on the interchangeable lens LE changes. The function is stored as the lens switch mode LMO ₂ , and every time the function key 2 is pressed, the non-operation mode, the ALM
(AE lock mode), RLPM (release priority mode), AMSM (aperture setting mode), and non-operation mode are switched in this order. Here, when the ALM (AE lock mode) is selected, pressing the lens key 25 once results in AE lock, and pressing the lens key 25 again cancels AE lock. When the RLPM (release priority mode) is selected, the release priority is given while the lens key 25 is being pressed. Furthermore, A
When VSM (Aperture setting mode) is selected,
While the lens key 25 is being pressed, the aperture value Av can be set. However, in the later-described MLM (shooting magnification lock mode), the lens key 25 acts as a switch for shooting magnification lock and release thereof, and in the case of WIM (wide mode), the lens key 25 switches to wide zoom and release thereof. Acts as.

Reference numeral 3 is a mode key, and this mode key 3
The exposure control mode changes to the program AE mode (P
Mode), aperture priority AE mode (A mode), shutter speed priority AE mode (S mode), manual mode (M mode), and program AE mode (P mode).

Reference numeral 4 denotes a system reset key. When the system reset key 4 is pressed, the lens switch mode LMO ₂ becomes the non-operation mode, the exposure control mode becomes the P mode, and the focusing lens is retracted to the ∞ position. Further, the current position register NCR for storing the moving amount of the focusing lens from the ∞ position is reset to 0.

Reference numeral 5 denotes a body display portion, the display contents of which are an exposure control mode, a lens mode LMO ₁ , a lens switch mode LMO ₂ , an exposure time, an aperture value and the like. Focus on the viewfinder display (not shown), focus detection not possible,
Displays the exposure time, aperture value, flash emission, etc.

Reference numeral 6 denotes a release button. When the first step is depressed, a photographing preparation switch S ₁ which will be described later is turned on to start the operations of photometry, exposure calculation and AF. Also, when the second step is pressed, the release switch S ₂ described later is turned on,
The exposure control operation starts.

Reference numeral 7 is an up / down lever, and when it is slid to the left, an up switch UPS, which will be described later, is turned on.
N, and the up operation is performed. Further, when it is slid to the right, a down switch DOS which will be described later is turned on, and the down operation is performed. When the up operation is done,
The shutter speed Tv is +1.0 in the S mode, the aperture value Av is +0.5 in the A mode, Tv is +1.0 if the Av selection key 8 is not pressed in the M mode, and Av is +0. It becomes 5. When the down operation is performed, Tv is -1.0 in the S mode, Av is -0.5 in the A mode, and Tv is -1.0 in the M mode if the Av selection key 8 is not pressed. If so, Av becomes -0.5.

Reference numeral 8 is an Av selection key, and as described above,
When the Av selection key 8 is pressed in the M mode and the up / down lever 7 is operated, Av changes. The function of this Av selection key 8 can be changed to AV by the function key 2.
When SM (aperture setting mode) is selected, the lens key 25 can be used as a substitute.

Reference numeral 9 is a mount lock release button, and 10 is a mount lock pin. Mount lock release button 9
When is pressed, the mount lock pin 10 retracts, the mount lock is released, and the interchangeable lens LE can be removed. If the interchangeable lens LE is mounted and in the mount lock state, the lens lock switch LLS described later is turned off, and in other cases, the lens lock switch LLS is set.
Is ON.

Reference numeral 11 denotes a stop lever, which is an interchangeable lens LE for the number of stop steps determined by the camera body BD.
It is a lever for narrowing down the diaphragm. Reference numeral 12 denotes an AF coupler, which is rotationally driven based on the rotation of the AF motor in the camera body BD. 13 is a hot shoe flash is mounted, the terminal J ₃₀ through J ₃₇ (not shown) is provided.

Reference numeral 14 denotes a lens mode setting member (for example, IC
When the lever provided on the mounting portion 14 is lowered in the direction shown by the arrow, the lid of the mounting portion 14 opens and the lens mode setting member can be mounted. There are three types of lens mode setting members, and if nothing is attached, the lens mode is not set.

The first setting member is a member for setting an AZP (auto zoom program), and four kinds of modes can be selected by the AZP switching lever 24 on the lens side. The first mode AZP ₁ is shown in FIG. 81, and the second mode AZP ₂ is shown in FIG.
2 and the third mode has the relationship between the focal length f and the shooting distance D shown in FIG. Each of these modes A
81 to 83 in the interchangeable lens LE based on the shooting distance D obtained by the camera body BD in ZP _{1 to} AZP ₃ .
The calculation is performed based on the graph (1) to calculate the focal length f, and the lens is moved to the focal length f. Fourth
The mode is MLM (shooting magnification lock mode). In this mode, when the photographer presses the lens key 25 once when the desired shooting magnification is reached, the shooting magnification at that time is locked, and thereafter, even if the shooting distance D changes, the locked shooting magnification is set. Such a focal length f is calculated by calculation, and the lens is driven up to the calculated focal length f. When the lens key 25 is pressed again, MLM (shooting magnification lock mode) is released.

The second setting member is WIM (wide mode)
When the lens key 25 is pressed once while this member is attached, the lens moves to the widest end and the surroundings of the subject can be confirmed. Further, even when focus detection is impossible, the wide end widens the field of view of the detection range and increases the contrast in the detection range, which facilitates detection. This is, for example, 3 at the tele end
This is effective for a telephoto zoom lens of 00 to 600 mm. Then, when the lens key 25 is pressed again, the lens returns to the original focal length.

The third setting member is a member for setting EXZM (zoom mode during exposure). When this member is mounted, the lens moves from the wide end to the tele end while the actual exposure of the film is performed, so that photographing with a special effect of zooming during exposure is performed. In addition,
In the embodiment, in the case of a varifocal lens in which the shooting distance changes due to zooming, the zoom operation between exposures is not performed even if the EXZM setting member is attached, but in the case of a varifocal lens, it is wide. The focus may be adjusted at the end and the lens may be moved from the wide end to the tele end during exposure. By doing so, it is possible to record the subject in such a manner that the subject focused at the wide-angle end becomes the core, and the focus gradually shifts and becomes larger. Although each setting member is generally configured by using a card (IC card) having a built-in microcomputer, a board on which a conductive pattern is printed may be used.

When the interchangeable lens LE is attached to the camera body, the mount lock pin 10 engages with the mount lock groove 22, the convex portion of the AF coupler 12 on the body side engages with the concave portion of the AF coupler 21 on the lens side, The rotation of the AF motor on the body side is transmitted to the lens side via the AF couplers 12 and 21, and the focusing lens moves to adjust the shooting distance. Further terminals J ₁ through J ₈ on the lens side is connected to the terminal J ₁₁ through J ₁₈ of the body side. Further, the stop lever 11 engages with the stop lever 20 on the lens side, the stop lever 20 on the lens side follows and moves by the amount of movement of the stop lever 11 on the body side, and the stop aperture moves the stop levers 11, 20. It is controlled to the value corresponding to the minute.

Reference numeral 23 denotes a P / M selection lever, which is a position for displaying PZOOM (power zoom) when zooming is performed by the motor in the lens based on the power source from the body (the letter "P" shown in the figure is exposed). Position). In this PZOOM (power zoom), the focal length can be moved in the tele direction and the wide direction by using the zoom motor by operating the tele key 26 and the wide key 27 of the lens. In addition, AZP (auto zoom program), WIM (wide mode), E
It is also possible to shoot in each lens mode of XZM (zoom mode between exposures). Further, when the P / M selection lever 23 is set at the position for displaying the manual zoom (the position for displaying "M" (not shown)), the power zoom operation is not performed, and the zoom ring 29 is used to manually perform zooming. When the manual zoom is set, AZP,
When each of the WIM and EXZM lens modes is set, a warning is given on the lens display unit 28.

A lens display unit 28 displays the lens mode LMO ₁ , the lens switch mode LMO ₂ , the focal length f, the shooting distance D, and the locked magnification β _L in MLM (shooting magnification lock mode).

Reference numeral 25 is a lens key, and its function is as described above. Reference numeral 24 denotes an AZP switching key, which is used when four AZP (auto zoom program) setting members are mounted, and four types of modes AZP ₁ and AZP are set.
₂ , AZP ₃ and MLM are switched.

4 to 9 are circuit diagrams of the entire camera system to which the present invention is applied. BD shown in FIGS. 4 to 6
C is a circuit inside the camera body, LEC shown in FIG. 8 is a circuit inside the interchangeable lens, and FLC shown in FIG. 9 is a circuit inside the flash.

S ₁ is a photographing preparation switch which is turned on when the release button 6 is depressed in the first step. S ₂ is a release switch that is turned on when the release button 6 is pushed down in the second step. S ₄ is a reset switch that is turned on when the exposure is completed and turned off when the winding is completed.

ALS is an AE lock switch which is turned on while the AE lock key (not shown) is pressed. SY
S is a system reset switch which is turned on while the system reset key 4 is pressed. MOS is a mode switch that is turned on while the mode key 3 is pressed.

UPS is an up switch which is turned on when the up / down lever 7 is slid to the left.
DOS is a down switch that is turned on when the up / down lever 7 is slid to the right.

MAS is a manual Av switch that is turned on when the Av selection key 8 is pressed, and is used when setting the aperture value Av in the manual mode. FUS is a function switch that is turned on when the function key 2 is pressed.

In the LLS, the interchangeable lens LE is the camera body B.
It is a lens lock switch that is turned off only when it is mounted on D and the mount is locked. The PWS is a power switch that is turned on when the main switch 1 is in the ON position and turned off when the main switch 1 is in the OFF position.

PG₁, PG₂Is the power switch PWS or
Is the lens lock switch LLS from ON to OFF or
Every time it changes from OFF to ON, a "Low" level pulse
It is a pulse generator that outputs a pulse. These outputs are AN
D-gate AN_FourThrough the internal microcomputer CPUB
Condition interrupt terminal NMI (Non Maskable In)
input) as an interrupt signal. power
Buffer BF only when switch PWS is ON_FiveNoh
Be activated. Switch S₁, ALS, SYS, MOS,
UPS, DOS, FUS and buffer BF₂Output is
NAND gate AN ₁And buffer BF_FiveThrough the interrupt terminal
INT_AInput to the power switch PWS
If these switches are ON when the
FA BF ₂When the output of is at "Low" level, the body
The internal microcomputer CPUB is interrupted.

The DOC is the mounting portion 1 for the lens mode setting member.
4 is a setting member mounted and outputs a signal indicating each lens mode of AZP, WIN, or EXZM.

DD ₁ is an in-body booster circuit, which performs a boosting operation when the in-body power supply control signal PWCB is at "Low" level. V _H is a high voltage (for example, 12 V) that serves as a power source for the focus detection light receiving circuit FDC, and V _L is a low voltage (for example, 6 V) that serves mainly as a power source for the analog circuit.

CVG ₁ is an in-body constant voltage source and outputs a constant voltage Vc (for example, 6 volts) for driving a digital circuit such as the in-body microcomputer CPUB.

EB is a power supply battery. The direct output Vo serves as a heavy load power source. The transistor BT ₁ operates when the in-lens power supply control signal PWCL ₁ is at “Low” level.
The output Vo of the power supply battery EB is _supplied as the high voltage V _LEH for the lens via the terminals J ₁₁ 1 and J ₁ as the power source of the zoom motor MO ₃ in the interchangeable lens. Transistor BT
₂ is a circuit in the interchangeable lens via the terminals J ₁₂ and J ₂ with the output Vc of the constant voltage source CVG ₁ as the low voltage V _LEL for the lens when the in-lens power control signal PWCL ₂ is at the “Low” level. Supply as a power source.

G ₁ is a ground line of the low power consumption part, and the lens and the body are connected via terminals J ₁₇ and J ₇ . In the body, the analog part and the digital part need to be separate ground lines, but they are shown as one line in the drawing. G ₂ is a ground line of the large power consumption unit, the lens and the body are connected via terminals J ₁₈ and J ₈ , and the flash and the body are connected via terminals J ₃₇ and J ₂₇ . .

BCC is a battery check circuit,
Port P₂₇Output when "Low" level
Determine the Vo voltage. V₀≧ V₁When is unconditional
AF motor MO₂And zoom mode
Ta MO₃Can operate simultaneously. At this time, the port
P₁, P₂, P₃Are all "High" level. V
₁> V₀≧ V₂When, the condition is judged to be normal.
AF motor MO ₂And zoom motor MO₃Simultaneous operation of
Is not allowed. At this time, port P₁Is "Low"
Bell, Port P₂, P₃Becomes the "High" level.
V₂> V₀≧ V₃When, it is judged as the first warning condition.
AF motor MO₂And zoom motor MO₃Simultaneous operation of
Is not allowed. At this time, port P₁, P₂Is "Lo
w "level, port P₃Becomes the "High" level.
V₃> V₀When, the second warning state is set and operation is prohibited.
It becomes a state. At this time, port P₁, P₂, P₃Is all
Becomes "Low" level.

REB is a reset terminal of the in-body microcomputer CPUB. When the battery EB is mounted, the REB receives a "Low" level pulse by a resistor and a capacitor as a reset signal, and resets the in-body microcomputer CPUB.

The FDC is a light receiving circuit for focus detection, and is provided with a focus detection CCD, a drive circuit for the CCD, and a circuit for processing the output of the CCD, A / D converting it, and supplying it to the microcomputer CPUB in the body. , And is connected to the in-body microcomputer CPUB via the data bus DB ₁ . Also,
When the charge accumulation (integration) of the light receiving portion is completed, a "Low" level pulse is input to the interrupt terminal INT _{B of the} in-body microcomputer CPUB.

MO ₂ is an AF motor and DR ₁ is a driver thereof, and the forward rotation / reverse rotation / stop is controlled by ports P ₁₆ and P ₁₇ .

ENC is an encoder and port P
₁₈ monitors the rotation of the AF motor MO ₂ is "Low" level, the counter was detected pulse input terminal CN
When the port P ₁₈ is at "High" level, the movement of the squeezing lever 11 is monitored and the detected pulse is output to the counter input terminal CNT.

MO ₁ is a charging motor for the film winding and exposure control mechanism. In addition, Mg ₁ is a release magnet, and Mg ₂ is a stop magnet (ApM).
g) and Mg ₃ are magnets for starting the front curtain running (1 CM
g), a magnet for starting the trailing curtain of Mg ₄ (2CMg)
Is. These are all pulse-driven by a combination magnet. DEDR is a charging motor MO
_This is a decoder driver that drives ₁ and the magnets Mg _{1 to} Mg ₄ based on the data from the data bus DB ₂ .

The FLCC is a direct photometry circuit for controlling the amount of light emitted from the flash, and its light receiving portion is arranged at a position for receiving the reflected light from the film surface. This direct photometry circuit FLCC is synchronized with the start of flash light emission, and an integration start signal INST sent from terminals J ₂₁ and J _31.
At A, the integration of the light receiving section is started. In-body microcomputer CPU
It is sent from B to the photometric interface LMIF, and D / A
When the light receiving portion is integrated up to the analog value ANO corresponding to the converted dimming level input to the direct photometric circuit FLCC, the direct photometric circuit FLCC flashes the light emission stop signal FSTP via the terminals J ₃₀ and J _20. Send to.

LMC is a multi-division photometric circuit provided in the optical path of the finder, and has a photometric interface LMIF.
The analog signal of each photometric unit is output to the photometric interface LMIF in accordance with the selection signal from.

LMIF is a photometric interface,
A light control level signal from the microcomputer CPUB in the body is input, D / A converted and output as an analog value ANO to the direct light metering circuit FLCC for flash emission control, or the metering section in the multi-division metering circuit LMC is selected. It has a function of A / D converting the selected photometric output and transmitting it to the in-body microcomputer CPUB.

ISD is ISO provided on the film container.
It is a film sensitivity output unit that outputs sensitivity data.

The DSP ₁ is an in-body display circuit, and in accordance with data from the in-body microcomputer CPUB, the lens display section 5 and the in-viewfinder display section (not shown) shown in FIG.
And has a function of sending data from the film sensitivity output unit ISD to the in-body microcomputer CPUB.

The photometric interface LMIF, the in-body display circuit DSP ₁ and the in-body microcomputer CPUB serially exchange data via the serial input SIN, serial output SOUT, and serial clock SCK signal lines. When the body select signal CSB is at "Low" level, the photometric interface LMIF is selected as the communication target with the in-body microcomputer CPUB.
When the display select signal CSD is at "Low" level, the display circuit DSP ₁ is selected. Furthermore, three serial communication signal lines SIN, SOUT, SC
K is an interchangeable lens. Terminals J ₅ , J ₁₅ ; J ₁₄ , J ₄ ;
Through J ₁₆ , J ₆ , flash is J ₂₄ , J ₃₄ ;
They are connected via J ₃ , J ₃₃ ; J ₂₅ , J ₃₅ . When the lens is designated as the communication target, the lens select signal CSL is set to the "Low" level.
This signal is transmitted to the lens via terminals J ₃ and J ₁₃ . Also, when specifying the flash as the communication target,
Is intended to be "Low" level flash select signal CSF, this signal is transmitted to the flash via the terminal J _36, J _26.

The signal line LBL connected through the terminals J ₁₃ and J ₃ between the interchangeable lens and the body is a bidirectional signal line. Port P _{22 of} microcomputer CPUB in the body is at "High" level and microcomputer CP in lens is
When the UL port P ₃₆ is at "High" level, the buffers BF ₁ and BF ₃ are activated, and a signal for the lens select signal CSL to be at "Low" level is transmitted from the in-body microcomputer CPUB to the in-lens microcomputer CPUL. ,
An interrupt signal is input to the interrupt terminal INT ₁ of the in-lens microcomputer CPUL, the in-lens microcomputer CPUL is activated, and the interchangeable lens is designated as an object to communicate with the body. On the other hand, port P of microcomputer CPUB in the body
₂₂ is "Low" level, when the lens microcomputer CPUL port P ₃₆ is "Low" level, the buffer B
When F ₂ and BF ₄ are activated, microcomputer CPU in lens
When the L port P ₃₅ becomes "Low" level, this signal is input to the interrupt terminal INT _{A of the} in-body microcomputer CPUB via the signal line LBL, the AND gate AN ₁ and the buffer BF ₅ , and the interchangeable lens is used. Lens key 25,
Each operation of the tele key 26 and the wide key 27 activates the in-body microcomputer CPUB.

SX is a synchro switch which is turned on when the traveling of the shutter front curtain (1C) is completed, and is transmitted as a light emission start signal to the flash through terminals J ₃₂ and J ₂₂ .

Next, the in-lens circuit LEC (see FIG. 8) will be described. LMS is a lens mode switch that is turned on when the AZP switching lever 24 is slid.
LES is a lens switch that is turned on when the lens key 25 is pressed.

TeS is a teleswitch that is turned on when the telekey 26 is pressed. WiS is a wide switch that is turned on when the wide key 27 is pressed. When these switches LMS, LES, TeS, WiS are turned on, the microcomputer CPU in the lens is connected via the AND circuit AN _2.
An interrupt signal is input to the interrupt terminal INT _{0 of} L to activate the in-lens microcomputer CPUL.

FEN is a code plate for outputting data corresponding to the zoom position. The DSP ₂ is an in-lens display circuit for displaying on the lens display unit 28 based on data from the in-lens microcomputer CPUL.

MO ₃ is a zoom motor and DR ₂ is a driver thereof, and forward / reverse rotation / stop is controlled by outputs from the ports P ₃₇ and P ₃₈ . Whether or not the power source of the driver DR ₂ is supplied is monitored by the in-lens microcomputer CPUL via the voltage dividing resistor and the port P ₃₉ .

AMFS is a changeover switch interlocked with a P / M selection lever for switching between power zoom and manual zoom. Power zoom is selected at the P position and manual zoom is selected at the M position.

REL is a reset terminal of the in-lens microcomputer CPUL, and when a low voltage V _LEL for the lens is supplied from the body through the terminals J ₁₂ and J ₂ , a pulse of "Low" level by a resistor and a capacitor. Is received as a reset signal, and the microcomputer CPUL in the lens performs a reset operation.

The low voltage V _LEL for the lens is supplied while the interchangeable lens is mounted on the body. On the other hand, the high voltage V _LEH for the lens is supplied only when performing the power zoom.

Next, the circuit FLC in the flash (see FIG. 9) will be described. EF is a power supply battery for flash. The DDF is a booster circuit in the flash and operates when the port P ₅₇ is at "Low" level. CVG _F is a constant voltage source in the flash, which generates a constant voltage from the power supply battery EF for the flash and supplies power to the low power consumption section in the flash circuit FLC.

MO ₅ is a motor for changing the flash irradiation range, and DR ₄ is a driver thereof, and forward rotation, reverse rotation, and stop are controlled by ports P ₅₃ and P ₅₈ . ZPC is a code plate for outputting the position data of the flash irradiation range changing member driven by the motor MO ₅ . DS
P ₃ is a flash in the display circuit, a flash of light emission / non-emission, the relative range, charging is completed, the dimming OK, displays the irradiation range. MC is a main capacitor, which stores energy for flash emission.

FL is a light emitting portion, and the main capacitor M
When the charging voltage of C reaches a predetermined value (e.g., 300 volts), and a charge completion signal CHC is "High" level, this signal is transmitted to the port P ₅₀ of the flash microcomputer CPUF. When the ON signal of the synchro switch SX is transmitted through the terminals J ₃₂ and J ₂₂ , the flash emission is started by the light emitting section FL, and the integration start signal INSTA is transmitted through the terminals J ₂₁ and J ₃₁ to the direct photometry circuit FL of the body.
It is transmitted to CC. Only from the port P _{52 of the} microcomputer CPUF in the flash, "L"
Flash enable signal FLEN which becomes "ow" level
Is provided to the light emitting unit FL. When the light emission stop signal FSTP is input from the direct photometry circuit FLCC for controlling flash light emission in the body to the light emitting unit FL via the terminals J ₃₀ and J ₂₀ , the light emitting unit FL stops the flash light emission and the flash display control signal. FDC is kept at "High" level for a certain period of time, and the dimming OK is displayed on the in-flash display circuit DSP ₃ .

The FMS is a flash main switch for switching the flash emission / non-emission. This flash main switch FMS goes from ON to OFF or OFF
From the pulse generator PG ₃ every time from ON to ON
Low "level is pulse output of the interrupt signal to the interrupt terminal INTα flash microcomputer CPUF is input. Also, from a port P ₂₃ of the body within the microcomputer CPUB through the terminal J _36, J _26" Low " When the level flash select signal CSF is input, the interrupt terminal INTβ
An interrupt signal is input to. In addition, microcomputer C in flash
The PUF port P ₅₆ is for discriminating between the body data input mode and the flash data output mode by the flash select signal CSF.

This completes the description of the hardware configuration of the camera system to which the present invention is applied, and then the flowchart of the software configuration (FIGS. 10 to 7).
This will be described with reference to 9).

First, when the power supply battery EB is attached to the body, the reset terminal R of the microcomputer CPUB in the body is
The reset signal is input to the EB, and the reset routine shown in FIG. 10 is executed. In the reset routine, first the ports, registers, and flags are reset (#
1). Next, set the power control signal PWCB in the body to "Lo
The booster circuit DD _{1 in the} body is operated at the w "level,
Supply of high voltage V _H and low voltage V _L in the body is started (# 2). Then, a battery check subroutine (hereinafter referred to as "BC routine") is executed (SU
B1).

This BC routine will be described with reference to FIG.
It When this subroutine is called, first the port P
₂₇Battery check circuit B with "Low" level
Operate CC and wait until the circuit stabilizes (# 10
1, # 102). Next, port P ₁But "High" level
It is determined whether or not it is (# 103). Port P₁Is "Hi
If it is gh "level, the battery voltage is V₀≧ V₁And
Set the terry check register BCR to BCR = 11
(# 104). Here, battery check register B
CR is a 2-bit register, and AF motor MO₂When
Zoom motor MO₃BCR when both can be turned on simultaneously
= 11, BCR = 10 when simultaneous ON is impossible, alarm
BCR = 01 when notified, BCR = 0 when inoperable
It is set to 0. # 103 for port P₁But"
If it is not at "High" level, port P is set at # 105.
₂Is at the "High" level. Port P₂
Is "High" level, V₁> V₀≧ V₂And
BCR = 10 (# 106). # 103 for port P
₂Is not "High" level, port is # 107
P₃Is at the "High" level. Port P
₃Is "High" level, V₂> V₀≧ V₃And
BCR = 01 and the first BC warning (for example, battery
The mark indicating that the amount is small blinks) (# 10)
8, # 109). Each of # 104, # 106, and # 109
After doing the work, port P at # 110.₂₇"High"
As a level, the battery check circuit BCC is disabled.
And return to the return address. Port P at # 107
₃Is not "High" level, V₃> V₀And
Set BCR = 00 and set the second BC warning
Blinking the mark indicating and)₂₇"High
The battery check circuit BCC is not operated as "h" level.
The power supply control signal PWCB in the body to "High"
Booster circuit DD in the body as a level₁Stop the body
The internal microcomputer CPUB stops its operation (# 110- #
113). Therefore, V₃> V₀To replace the battery
Reset operation or interrupt signal to unconditional interrupt terminal NMI
No. (Power switch PWS or lens lock switch L
Only the operation by LS ON / OFF operation is accepted.
Yes.

Return to the reset routine (FIG. 10) to check the power.
-It is determined whether the switch PWS is ON (# 3). Pa
If the power switch PWS is ON, set the power flag PWF
If the power switch PWS is not ON, the power is set to 1.
The flag PWF is set to 0 (# 4, # 5). Then the lens
Determine whether the lock switch LLS is ON (#
6). If the lens lock switch LLS is ON,
Since it is not installed, use # 7 to attach the lens.
Lag LLF is set to 0 and the lens is not attached.
Execute (SUB2). Lens lock switch LLS
If is not ON, the lens is attached
Therefore, the lens mounting flag LLF is set to 1 in # 8,
Executes the lens mounting operation subroutine (SUB3)
It The operation of the subroutine SUB2 or SUB3 ends.
Then, the power control signal PWCB in the body is set to "High" level.
Stop the booster circuit DD1 in the body as a bell
Child INT _AInterrupt is allowed and the operation ends (# 9,
# 10).

Here, the sub-routine (SUB2) of the lens non-mounting operation will be described with reference to FIG. When this subroutine is called, first the AF lens mounting flag LLF is set.
_{When 1 is set} to 0, the power control signals PWCL ₁ and PWC in the lens
High voltage V for lens with L _{2 set} to “High” level
Stop the power supply of _LEH and low voltage V _LEL (# 120- #
122). Next, it is determined whether the power flag PWF is 1 (# 123). If the power flag PWF is 1, the lens is not mounted (the aperture value display section is set to “−−”), the set mode is displayed, and if the exposure time is set, the exposure is performed. The time data is displayed and the process returns (# 124, # 125). Power flag P
If WF is 0, all displays are erased and the process returns (# 126).

Next, the lens mounting operation subroutine (S
UB3) will be described with reference to FIGS. In this lens mounting operation, communication between the body status ICPB and the lens status ICPL is performed, and the reset operation of the zoom lens and the focusing lens is performed. First,
Body status ICPB and lens status ICPL
Is 1-byte data used to notify the other party of the state of the body and the lens, and is configured as follows.

(A) Body status ICPB is the best
Place bit b₇To least significant bit b₀From 8 bits up to
Become. Below, the i-th video of Body Status ICPB
The abbreviation for bi is ICPBi. Bit b₇, B₆Is
The distinction between the new body and the old body is shown, and ICPB₇₆=
If 00, old body, ICPB₇₆If = 01, new
Means Di. The old body is the new body (see Figures 4-7).
It does not have all of the functions of₁₁, J₁₈Have
Yes. Bit b_Five, B_FourShows the sequence of bodies
ICPB₅₄= 00, the body is inactive, ICPB
₅₄If = 01, the body is in operation and ICPB₅₄= 10
Then, the body is exposed to the ICPB ₅₄= 11
The body means that the system has been reset. B
T b₃Indicates the state of the power switch PWS on the body
And ICPB₃= 0, the power switch PWS is
ON, ICPB₃= 1, the power switch PWS is O
It means FF. Bit b₂Is body data
Shows the classification of output and lens data input, ICPB
₂If = 0, output body data, ICPB₂If = 1
Means lens data input. Bit b₁Power zoo
It indicates whether or not the₁= 0 then powers
Not possible, ICPB₁= 1 means power zoom is possible
I do. Bit b₀Indicates whether or not the AF operation is in progress, and I
CPB₀If = 0, no AF operation, ICPB₀If = 1
This means that the AF operation is in progress.

(B) The lens status ICPL is the best
Place bit b₇To least significant bit b₀From 8 bits up to
Become. Below is the i-th lens of the lens status ICPL.
The unit bi is abbreviated as ICPLi. Bit b₇, B₆Is
The distinction between the new lens and the old lens is shown.₇₆=
If 10 then old lens, ICPL₇₆= 01 new
Mean The old lens is the new lens (see Fig. 8)
Not equipped with all functions, terminal J₁, J₈Does not have. Bit
B_Five, B_FourIs a tele switch Te provided on the lens
S, wide switch WiS, lens switch LES status
Is shown. ICPL₅₄= 00, each switch Te
S, WiS, LES are all OFF, ICPL₅₄= 01
Raba Teleswitch TeS is ON, ICPS₅₄= 10
Wide switch WiS is ON, ICPL₅₄= 11
For example, it means that the lens switch LES is ON.
Bit b₃, B₂, B₁Indicates the type of lens
It ICPL₃₂₁= 001, fixed focus lens, IC
PL₃₂₁= 010, it is a normal zoom that is not varifocal
Power zoom with IC lens, ICPL₃₂₁If = 011
It is a manual zoom lens that is not varifocal.
Le Zoom, ICPL₃₂₁= 100 is varifocal
Power zoom with lens, ICPL₃₂₁= 101
Refocal lens means manual zoom
To taste. Fixed focus lens or manual
The zoom lens is a type I lens, not a varifocal lens.
Use a normal zoom lens with a type II lens, Varifo
The local lens is called a type III lens. Lenses
Least significant bit b of status ICPL ₀Is in the zoom
Is shown. ICPL₀If = 0, zoom stop, I
CPL₀= 1 means that zooming is in progress.

The above-mentioned body status ICPB and lens status ICPL are data used for letting the body and the lens know each other's state, and are extremely important. Therefore, the body status ICPB is arranged at the 0th address AD0 of the data group sent from the body to the lens, and is transmitted at the beginning of communication. In addition, the lens status ICPL is the 0th data group sent from the lens to the body.
It is located at address AD0 and is transmitted at the beginning of the communication.

The data group sent from the body to the lens is
It consists of a total of 4 bytes from the 0th address AD0 to the 3rd address AD3. The 0th address AD0 has a body status ICPB, the 1st address AD1 has a data pointer DPO, and the 2nd address AD2 has a mode buffer MO.
Information on the photographing distance D is transmitted at B and the third address AD3. The data pointer DPO is used for the upper 4 bits b _{7 to} b ₄ when the body inputs data from the lens.
Designates the start address of the lens data, and the lower 4 bits b _{3 to} b ₀ designate how many bytes of data are to be input from the start address. Mode buffer M
OB is a lens mode LM by the display circuit DSP ₂ in the lens.
To view the O ₁ and lens switch mode LMO _2, lens mode LMO by the upper 4 bits b ₇ ~b _4
1 indicates the lens switch mode LMO ₂ by the lower 4 bits b _{3 to} b ₀ . Lens mode is LMO ₁
= 0000 is inactive, LMO1 = 1000 is A
ZP (auto zoom program), LMO ₁ = 0001
Means WIM (wide mode), and LMO ₁ = 0010 means EXZM (zoom between exposures). Lens switch mode is inoperative if LMO ₂ = 0000, LM
If O ₂ = 0001, ALM (AE lock mode), L
MO ₂ = 0010 means RLPM (release priority mode), and LMO ₂ = 0011 means AVSM (aperture priority mode).

Next, the data group sent from the lens to the body consists of a total of 9 bytes from the 0th address AD0 to the 8th address AD8, the lens status ICPL at the 0th address AD0 and the open aperture value at the 1st address AD1. Avo, the minimum aperture value Avm at the second address AD2
ax, the aperture value deviation value ΔAvz at the third address AD3,
At the fourth address AD4, a conversion coefficient Kl for converting the defocus amount DF into a coupler rotation speed N, a fifth address AD5
Then, the conversion coefficient NDC for converting the coupler rotational speed N into the photographing distance D, the focal length f at the sixth address AD6, the photographing magnification β at the seventh address AD7, and the in-lens offset amount N _L at the eighth address AD8 are transmitted. To be done.

When the lens mounting operation subroutine (SUB3) shown in FIGS. 17 and 18 is called, first, the in-lens power supply control signal PWCL _{2 is set} to the “Low” level to start the supply of the low voltage V _LEL for the lens. Do (# 14
0). As a result, the operating power supply voltage is supplied to the in-lens microcomputer CPUL and the C connected to the reset terminal REL is connected.
The R circuit resets the microcomputer CPUL in the lens. It waits for a sufficient time to complete the reset operation (# 141). Then, 0111 * 010 is set in the body status ICPB (# 14
2). This indicates new body, system reset, power switch ON or OFF, body data output, power zoom possible, AF non-operation. The b ₃ = * Body status ICPB, power flag PWF = 1 if b ₃ =
If 0 and PWF = 0, b ₃ = 1 is set (# 143-
# 145). Then, at the same time as outputting this body status ICPB to the lens, the lens status ICPL is read from the lens (# 146 to # 150). Specifically, set the port P _{22 of the} microcomputer CPUB in the body to "Hi".
As the gh "level, the lens select signal CSL from the port P ₂₁ receives the buffer BF ₁ and the bidirectional signal line LB.
L, terminals J ₁₃ and J ₃ , and buffer BF ₃ through the lens microcomputer CPUL interrupt terminal INT ₁ and port P ₄
Lens select signal CSL
Is set to the "Low" level to generate an interrupt at the microcomputer CPUL in the lens through the interrupt terminal INT ₁ and wait for a predetermined time. Then, the body status ICPB is output to the lens in synchronization with the serial clock SCK, and
Input the lens status ICPL from the lens. After that, the lens select signal CSL is returned to the "High" level to end the communication. Since the above procedures of # 147 to # 150 are frequently used, they are hereinafter abbreviated as "bidirectional status communication" and mean the exchange of the body status ICPB and the lens status ICPL.

Bidirectional status communication (# 147- # 15)
When (0) is completed, it is determined whether or not it is a dedicated AF lens (# 151). Port P if not a dedicated AF lens
_After returning ₂₂ to the "Low" level, the lens non-mounting operation (subroutine SUB2) is executed, and the process returns.

If the dedicated AF lens at # 151, A
The F lens mounting flag LLF _{1 is set} to 1 and it is determined whether or not it is a new lens (# 155, # 156). Even if the old lens is a dedicated AF lens, it does not have the in-lens microcomputer CPUL and has only the function of outputting data at addresses AD0 to AD6. When it is determined in # 156 that the lens is the old lens, the process proceeds to # 170 and the subsequent steps. If the lens is a new lens in # 156, it is determined in # 157 whether the lens is a type I lens. The type I lens is either a fixed focus lens or a zoom lens that is manually zoomed. Then, if the lens is a type I lens, the process proceeds to # 170 and thereafter, as in the case of the old lens.
On the other hand, if it is determined in # 157 that the lens is not a type I lens, power zooming is possible, so the lens internal power supply control signal PWCL _{1 is set} to "Low" to supply the lens high voltage V _LEH , and the power is supplied for a certain period of time. Wait (# 15
8, # 159).

This is the most complete operation after power zooming.
This is because the long focal length is set automatically and the battery
In addition to wearing or lens mounting, power switch PWS
It is also performed when is turned off. High voltage V for lens_LEH
Bidirectional status communication (# 16
0- # 163) and perform the lens status ICPL
Least significant bit b₀Determines whether is 1 (# 16
4). Least significant bit b ₀If is 1, it is zooming, #
Returning from 164 to # 160, the bidirectional status communication (#
160 to # 163). Repeat this, # 164
And the least significant bit b of the lens status ICPL₀To 0
If so, it means that the zoom is stopped, so # 16
Power control signal PWCL in lens at 5₁"High"
Return to the high voltage V_LEHOf power supply to # 170
Move to the descending process.

At # 170, the AF motor MO ₂ is driven toward the ∞ position. Then, after waiting a certain period of time, it is determined whether or not the lens reaches the end (# 171, # 1).
72). Specifically, if the pulse from the encoder ENC is no longer detected even when the AF motor MO ₂ is driven, it is determined that the lens has reached the end in that state. The processes of # 171 and # 172 are repeated until the lens reaches the end. When the lens reaches the end, the AF motor MO ₂ is stopped and the current position register NCR is set to 0 (# 173, # 174). The current position register NCR is
This is a register for storing the amount of movement of the focusing lens from the ∞ position (the number of pulses from the encoder ENC).

When the content of the battery check register is BCR = 11, the AF motor MO ₂ and the zoom motor MO ₃ can be moved at the same time. Therefore, the above zooming (# 158 to # 165) and the focusing lens to the ∞ position are performed. The movement (# 170 to # 174) may be performed at the same time. Further, the focusing lens is moved to the ∞ position when the power battery EB is mounted, the interchangeable lens LE is mounted, the power switch PWS is turned on and off, and the system reset key 4 is pressed. Is also done.

When the above zooming and the movement of the focusing lens to the ∞ position are completed, the process proceeds to # 175 shown in FIG. 19 to determine whether or not it is a new lens. With a new lens,
01000110 or 01 for body status ICPB
001100 is set (# 176 to # 179). This is because the body is inactive, the power switch is ON or OFF,
Indicates that lens data is input, power zoom is enabled or disabled, and AF is not activated. Next, the lens mode LMO ₁ and the lens switch mode LMO ₂ are set in the mode buffer MOB, and the data pointer is set as DPO = 16 _H in order to specify the input data from the lens as 6 bytes from the first address AD1 ( # 180, # 181). Then, the body status ICPB and the lens status ICPL are exchanged by bidirectional status communication (# 182 to # 184), and the data pointer DPO is output (# 185, # 18).
6), the mode buffer MOB is output to the lens and the open aperture value Avo is input from the lens (# 187, # 1
88), subsequently, the minimum aperture value Avmax, the aperture value deviation amount ΔAv, the conversion coefficients K _L and NDC, and the focal length fv are input from the lens (# 189 to # 193). Here, the data of the focal length f from the lens is the value fv of the apex system.
Entered in. After the above data communication is completed, the lens select signal CSL is returned to the "High" level and the lens switch mode LMO ₂ is displayed (# 194, # 19).
5).

Next, it is judged whether the lens is a type I lens (fixed focus lens or manual zoom lens) (# 1).
96). If it is a type I lens, the display of the lens mode LMO ₁ is erased in # 197, and the process proceeds to # 205. If it is not a type I lens but a lens capable of power zooming, it is determined whether or not it is EXZM (zoom between exposures) (# 198). If it is not EXZM (zoom between exposures),
The lens mode LMO ₁ is displayed in # 200, and the process proceeds to # 205. If it is EXZM (zoom between exposures), it is determined whether the lens is a type III lens (varifocal lens) (# 199). # 1 for type III lenses
In 97, the display of lens mode LMO ₁ is erased, and # 205
Move to # 20 if it's not a type III lens
The lens mode LMO ₁ (EXZM) is displayed with 0, and # 2
Move to 05. The display of the lens mode LMO ₁ and the lens switch mode LMO ₂ (# 200, # 195)
In, when each mode is set to the inoperative state, the respective display is not performed. Further, if the varifocal lens also performs the operation of EXZM (zoom between exposures), the steps of # 198 and # 199 are unnecessary.

When it is determined that the lens is an old lens in # 175, the lens side cannot read even if the body data is output. Therefore, the body data is not output and the lens status ICPL, the maximum aperture value Avo, and the minimum aperture value Avma are output.
Input x, aperture deviation ΔAv, conversion coefficient K _L and NDC, and apex focal length fv (# 201 to # 2).
03). Further, the display of the lens mode LMO ₁ and the lens switch mode LMO ₂ is erased (# 204). Then, the contents of the register in which the set aperture value is stored in both the old and new lenses are set to (Avo + ΔAv) and (Avma
It is restricted to fall within the range of x + ΔAv (# 20
5). Next, it is determined whether the power flag PWF is 1 (# 206). If PWF = 1, the set value is displayed and PW
If F = 0, all displays are erased (# 207, # 20
8). In either case, port P _{22 is set} to "Lo".
w "is returned to level, the process returns (# 209). Here, the port P _22" return to the Low "level, interrupts CPUB the microcomputer body via a bidirectional signal line LBL from lens microcomputer CPUL This is because it is possible to input an interrupt signal to the terminal INT _A , and if there is no need to act on the lens from the body, basically the port P
By returning ₂₂ to the "Low" level and waiting, the lens is activated.

Next, the power switch PWS is turned from ON to O.
When it changes to FF or from OFF to ON, or
ONS lock switch LLS from ON to OFF or OF
The operation when changing from F to ON will be described.
Whether the power switch PWS is from ON to OFF or OFF
From ON to ON, pulse generator PG₁From "L
ow "level pulse is the lens lock switch LLS
When changes from ON to OFF or from OFF to ON,
Pulse generator PG₂"Low" level pulse from the
But each AND gate AN_FourUnconditional interrupt end via
It is input to the child NMI and interrupts after # 15 shown in FIG.
Perform processing. The processing of # 15 to # 26 is performed by the power switch.
Lens is attached / detached when PWS is turned on / off
To end the operation so far as soon as
Is the operation. First, the high voltage V for the lens_LEHPower supply
Stop (PWCL1 = "High"), zoom motor
MO ₃Is stopped (# 15). In addition, the AF motor MO
₂The stop signal of is output (# 16). Next, whether exposure is in progress
It is determined (# 17). If exposure is in progress,
To Mg₂~ Mg_FourTo end the exposure control operation.
(# 18- # 22). Then the exposure control operation ends
Then reset switch S_FourWhen is turned on, film winding
Lifting motor MO₁Turn on to wind the film
Perform (# 23, # 24). Film winding is completed
Reset switch S_FourWhen is turned off, film winding
Lift motor MO₁Is stopped (# 25, # 26). So
Then, the process proceeds to # 27.

If the exposure is not being performed in # 17, it is determined whether or not the film is being wound (# 41). If the film is being wound, the process proceeds to # 25, and after the film winding is completed, the process proceeds to # 27. If neither exposure nor film winding is performed in # 17 and # 41, the process immediately proceeds to # 27.

When the exposure and film winding are completed in this way, the port is reset and the in-body booster circuit DD ₁ is operated (PWCB = "Low") (# 27, # 28). Next, BC routine (SUB1)
Is executed to shift to # 29.

At # 29, it is determined whether the lens lock switch LLS is ON. If the lens lock switch LLS is ON, the lens is not attached. If the lens lock switch LLS is ON in # 29, is the lens lock switch LLS changed from OFF to ON in # 30?
It is determined by the lens mounting flag LLF whether it remains ON, and in the latter case, the process proceeds to # 31. If the lens lock switch LLS is OFF in # 29, it is determined in # 37 whether the lens lock switch LLS is changed from ON to OFF or remains OFF by the lens mounting flag LLF. In the latter case, # Move to 31. # 29
If the lens lock switch LLS is ON at # 30 and LLF = 0 is not set at # 30, it means that the lens lock switch LLS is changed from OFF to ON. At # 36, LLF = 0 is set, and the lens is not attached (SUB2 ) Is executed to move to # 39. If the lens lock switch LLS is OFF in # 29 and LLF = 1 is not set in # 37, it means that the lens lock switch LLS is changed from ON to OFF, and LLF = 1 is set in # 38, and the lens mounting operation ( SUB3) is executed to move to # 39.

When the lens lock switch LLS remains ON or OFF in # 29, # 30, and # 37, the process proceeds to # 31. Power switch PW for # 31
It is determined whether S is ON. Power switch P with # 31
If WS is ON, it is determined in # 32 whether the power switch PWS has changed from OFF to ON or remains ON by the power flag PWF. In the latter case, #
Move to 39. The power switch PWS is OF at # 31
If it is F, it is determined in # 34 whether the power switch PWS has changed from ON to OFF or remains OFF by the power flag PWF. In the latter case, the process proceeds to # 39. The power switch PWS is ON in # 31,
If PWF = 1 in # 32, power switch PWS
Has changed from OFF to ON, and # 33
Then, PWF = 1 is set, the power-on routine (SUB4) is executed, and the process proceeds to # 39. If the power switch PWS is OFF in # 31 and PWF = 0 is not found in # 34, it means that the power switch PWS has changed from ON to OFF, PWF = 0 is set in # 35, and the power-off routine (SUB5) is performed. And executes # 39. In # 39, the operation of the in-body booster circuit DD ₁ is stopped (PWCB = “High”), and in # 40, the interrupt from the interrupt terminal INT _A is permitted and the process is ended.

The contents of the power-on routine (SUB4) are shown in FIGS. First, in # 210, whether or not a dedicated AF lens is attached is determined by the AF lens attachment flag LLF ₁ . # 210 with LLF ₁
If = 1 is not set, it is determined that the dedicated AF lens is not mounted, the lens non-mounting operation subroutine (SUB2) is executed, and the process returns. If LLF ₁ = 1 in # 210, it is determined that a dedicated AF lens is attached, and port P
_{22 is set} to the "High" level, and thereafter, the processing after # 170 (reset of the infinity position of the focusing lens) in the above-mentioned lens mounting operation subroutine (SUB3) is performed and the process returns.

Power switch off routine (SUB5)
The contents of the above are the lens mounting operation subroutine (SU
The same processing as the subroutine (SUB3) is performed except that the processing of # 140 and # 141 in B3) is omitted.

The above points can be summarized as follows:
Low voltage V to the lens when the lens is attached _LELSupply len
Start the microcomputer CPUL in_LELCompanion
When feeding or when the power switch PWS is off,
Set to a compact zoom position, then
Move the focus lens to the ∞ position when the switch PWS is turned on.
Reset. Also, by removing the lens,
Low voltage V for_LELWill be stopped.

Next, the interrupt operation when various switch operations are performed will be described. When various switches are operated and an "Low" level interrupt signal is input to the interrupt terminal INT _A , the processes of # 50 and thereafter shown in FIG. 13 are performed. First, the in-body booster circuit DD ₁ is operated (PWCB
= “Low”), and the power supply of the lens high voltage V _LEH is stopped (PWCL ₁ = “High”) (# 50, # 5).
1). This is because an interrupt may occur during zooming. After executing the BC routine (SUB1), it is determined by the AF lens mounting flag LLF ₁ whether or not the dedicated AF lens is mounted (# 52). L
If LF ₁ = 1 then a dedicated AF lens is installed, so the bidirectional signal line LBL connected to this lens is connected.
Is at the "Low" level (# 5
3). If the bidirectional signal line LBL is at "Low" level, an in-body microcomputer CPU is generated by an interrupt signal from the lens.
Since B has been activated, the process proceeds to # 60 after executing the lens routine (SUB6). # 53
The bidirectional signal line LBL connected to the lens is "High"
If the h ″ level or LLF ₁ ≠ 1 at # 52, it is not activated by an interrupt signal from the lens, so various switches in the body are scanned (# 54 to # 58).

First, it is determined whether the switch S ₁ is ON (# 54). If the switch S ₁ is ON, it means that the operation is performed by operating the release button 6, so that the S ₁ routine (SUB7) is executed and then the process proceeds to # 60. # 54
If the switch S ₁ is not ON in step # 55, # 5,
6, switches # 57, # 58 for switches ALS, SYS, MO
It is determined whether S or FUS is ON, and if any switch is ON, the AE lock routine (SUB8), system reset routine (SUB9), mode change routine (SUB10), function corresponding to the switch Each subroutine of the routine (SUB11) is executed, and the process proceeds to # 60. Also, # 54 to # 58
If none of the switches is turned on, it is determined that the up switch UPS or the DOWN switch DOS is turned on, the Av / Tv up / down subroutine (SUB12) is executed, and the process proceeds to # 60.

In # 60, the body status ICPB is
Data indicating non-operation, power switch ON, body data output, power zoom enabled, AF non-operation 01001010
Set. In step # 61, the lens mode LMO ₁ and the lens switch mode LMO ₂ are set in the mode buffer MOB. # 62 in the port P ₂₂ as "High" level, the signal transmission line of a bidirectional signal line LBL from the body to the lens. In # 63, the lens select signal is set to the "Low" level to set the microcomputer CPUB in the body.
Select a lens to communicate with. And # 64
And wait for a certain time at # 65, Body status ICPB
Output to the lens, wait for a certain time at # 66
At 67, the contents of the mode buffer MOB are output to the lens. In # 68, the lens select signal CSL is set to "High".
Return to "h" level, and at # 69, set port P ₂₂ to "Low".
As a level, the bidirectional signal line LBL is used as a signal transmission line from the lens to the body. As a result, the lens is ready for activation from the lens. In step # 70, boosting by the booster circuit DD ₁ in the body is stopped (PWCB = "Hi"
gh ″), # 71, the interrupt is permitted by the interrupt signal INT _A , and the process is terminated.

Next, the S ₁ routine (SUB7) called when the switch S ₁ is turned on is shown in FIGS.
Will be explained. In this subroutine, first, the photometric enable signal LMEN is set to the "Low" level to activate the photometric interface LMIF (# 251).
As a result, the photometric interface LMIF sequentially A / D-converts each photometric value at a constant cycle based on the reference clock φ from the microcomputer CPUB in the body, and each photometric unit is completed each time the A / D conversion of one photometric value is completed. The operation of latching the photometric data in the register corresponding to is repeated while the photometric enable signal LMEN is at "Low" level. Next, it is determined whether or not the dedicated AF lens is attached by the AF lens attachment flag LLF ₁ (# 252). LLF ₁ =
If 1 (AF lens attached), the flag AFF indicating that the AF operation is performed is set to 1 and the offset routine (S
If LLF ₁ = 0 (the AF lens is not mounted) in UB13), the process proceeds to # 297.

In the offset routine (SUB13) and thereafter, processing for focus detection is performed. First, an offset routine (SUB13) performs an offset process for moving the focusing lens to a position where focus detection is possible in the case of a varifocal lens. Offset processing is a varifocal lens that is out of focus due to zooming, but even if the focusing lens moves out of focus due to zooming, the focus lens is moved so that it will be in focus within the range from the ∞ position to the closest position. This ensures that the detection can be performed. The lens movement amount at this time is referred to as an offset amount N _L, and the calculation method will be described later with reference to FIGS. 84 and 85.

This offset routine (SUB13) will be described with reference to FIGS. 23 and 24. In this subroutine, it is first determined whether or not the mounted lens is a type III lens (varifocal lens) (# 30
1). If it is not a varifocal lens, it returns immediately. On the other hand, if it is a variable focal lens, it is determined whether or not the photographing preparation switch S ₁ is ON (# 302). When the shooting preparation switch S ₁ is ON, the body is in the process of calculation, and the power switch is ON, the lens data input, the zoom is enabled, the data 01010100 indicating that the AF is not operated, and the shooting preparation switch S ₁ is OFF, With the body inactive, data 01000100 showing the same state is set in the body status ICPB (# 303, # 3).
04). Data pointer is set to _{DPO = 81 H (# 305)} . This is 1 from the 8th address (AD8)
This means inputting byte data (that is, the offset amount N _L in the lens) from the lens. # 306
In # 311, these two data are sent to the lens. That is, the port P _{22 is set} to "High" level in # 306, the bidirectional signal line LBL is used as a signal transmission line from the body to the lens, and the lens select signal CS is set in # 307.
In-body microcomputer CPU with L set to "Low" level
A lens is selected as a communication target with B. And # 3
Wait for a certain time at 08 and wait for # 309 at Body Status I
# 310 sent and received CPB and lens status ICPL
After waiting for a certain period of time, the contents of the data pointer DPO are output to the lens in # 311. And waiting in the lens-side time required to compute the offset amount N _L, to enter the offset amount _{N L (# 312, # 313} ). In # 314, the lens select signal CSL is returned to the "High" level, and in # 315, the port P _{22 is set} to the "Low" level, and the bidirectional signal line LBL is used as a signal transmission line from the lens to the body. As a result, the activation from the lens can be accepted. In # 316, it is determined whether or not the offset amount is N _L = 0. If N _L = 0, it is not necessary to move the offset amount of the lens, and the process returns. On the other hand, if N _L ≠ 0, it is necessary to move the lens by an offset amount. Therefore, N _L × K _B = N (where K _B is the rotation amount N _L of the AF couplers 12 and 21 is the rotation amount N of the AF motor MO ₂ ).
The coefficient for converting to
AF motor MO for moving _L focusing lens
The rotation amount N of ₂ is calculated, and the rotation amount N is subtracted or added to the current position register NCR of the focusing lens according to the driving direction (# 317, # 318). Here, the rotation amount N is positive or negative. Then, the rotation amount N is preset in the counter for counter interruption, and the AF motor MO ₂ is rotated by the rotation amount N.
The counter content is subtracted by the pulse from the encoder ENC and rotated to the direction corresponding to the positive or negative direction of
Wait for And when the content of the counter becomes 0,
Stop AF motor MO ₂ and return (# 319-
# 321).

Returning to the flow of FIG. 21, when the processing of the offset routine (SUB13) in the S ₁ routine is completed, the CCD initialization operation for sweeping out the excess charge of the CCD is performed (# 253). Then, in order to prevent the power zoom from being performed, the zoom enable flag ZEN
F is set to 0, the photometry calculation incompletion flag LMF is set to 1 to indicate that the photometry calculation has not been completed even once, and the charge accumulation (integration) of the CCD is started.
AE is enabled by the interrupt signal input to NT _B.
The routine shifts to (# 254 to # 257).

In the AE routine, the lens communication routine (SUB14) is first executed. This is an operation of reading the data necessary for AE and AF from the lens. Then, it is determined whether the mounted lens is a new lens (# 258). AF completion flag AF for new lenses
It is determined whether CF is 1 (# 259). This is AF
AFCF =
If AF is completed in 1, power zoom is possible,
The zoom routine (SUB15) is executed. On the other hand, AF
If CF ≠ 1 and AF is not completed, zooming during focus detection changes the subject light incident on the light receiving unit for focus detection (the subject corresponding to the focus detection area changes), resulting in accurate Since focus detection cannot be performed, the zoom routine (SUB15) is skipped. Further, in the case of a varifocal lens, the shooting distance also changes due to zooming, so it is not desirable to perform zooming during movement of the focusing lens. AF for this reason
If is not completed, the zoom routine for power zoom (SUB15) is skipped. If AF is not completed or the zoom routine (SUB15) is finished, the lens switch routine (SUB16) is executed to perform the processing for the lens switch operation, and the process proceeds to step # 297.

If it is determined in # 258 that the lens is an old lens, the old lens has neither a power zoom mechanism nor a lens switch. Therefore, # 259, SUB15, and SUB16 are used.
Skips and shifts to # 297. Also, # 252
Even when the dedicated AF lens is not attached in step S29, the zoom routine (SUB15) and the lens switch routine (SUB16) are skipped and the process proceeds to # 297.

At # 297, ISO data indicating film sensitivity is input. Next, the data from the flash is input (# 260). When this flash data is input, the flash select signal CSF is set to "Low" level, and is set to "High" level after a certain period of time. Then, the serial clock SCK is output and the clock S
Read the serial data sent from the flash in synchronization with CK. As a result, each data of the dedicated flash, charging completion, dimming OK, and light emission amount is input from the flash to the body. Next, the photometric interface LMI
Subroutine for inputting photometric data from F (SU
B17) is executed, and the exposure calculation subroutine (SUB18) is executed based on the input photometric data. next,
The calculation result is sent to the display circuit DSP ₁ for display and the data is output to the flash (# 261, # 262).
When the data is output to the flash, the flash select signal CSF is set to the “Low” level, and the signal CSF is kept at the “Low” level while the data is output, thereby distinguishing from the case of the data input. The output data from the body to the flash is the aperture value Av, the film sensitivity Sv, the shooting distance Dv, and the focal length f. And
Since the photometric calculation has been performed, the photometric calculation unfinished flag LMF is set to 0 (# 263). In # 264, the flag FDF is 1
Determine whether or not. This flag FDF is set to 1 after setting the flag FDF to 1 after inputting data from the CCD when there is an interrupt due to the completion of CCD integration when the photometric calculation has not been completed even once. This is a flag provided for this purpose because it may return to the existing address and perform the remaining AE routine operation (see # 581 to # 583 in FIG. 39 described later). # 264 in FDF
If = 1, FDF = 0 is set in # 265, and the process proceeds to the AF routine. On the other hand, if FDF = 0 in # 264, #
The process moves to 266.

In steps # 266 to # 273, it is determined whether the exposure control operation can be performed. First, the AF lens whether only the # 266 of the AF lens attachment flag LLF ₁
Determined by If LLF ₁ ≠ 1 and it is not a dedicated AF lens, the process unconditionally proceeds to # 273. If it is a dedicated AF lens, whether or not the release enable flag RLEF is 1 is determined in # 267. If RLEF = 1 in # 267, the release priority is given, and therefore the process proceeds to # 273. # 267 R
If LEF ≠ 1, AF is prioritized, and whether or not the AF completion flag AFCF is 1 is determined in # 268. AF with # 268
If completed, the process proceeds to # 273, and if AF is not completed, # 27.
Move to 4. In # 273, the release switch S ₂ is O
It is determined whether it is N or not. Release switch S ₂ with # 273
If is ON, the process proceeds to the exposure control operation (SUB19). On the other hand, if the release switch S ₂ is OFF, # 2
Move to 74.

In # 274, the photographing preparation switch S₁Is O
It is determined whether it is N or not. Shooting preparation switch S₁Is ON
For example, in # 275, the predetermined value K is set in the timer register TIR.
Set, reset the timer in # 276, and start.
Let Then, in # 298, it is determined whether or not the AF lens is a dedicated AF lens.
F lens mounting flag LLF₁Determined by LLF ₁
= 1 (dedicated AF lens), AF operation in # 299
AF operation flag AFF indicates whether or not
Determine. If AFF ≠ 1, the process proceeds to # 252 and AFF
If = 1, the process proceeds to the AE routine. Also, in # 298
If it is not a dedicated AF lens, the process proceeds to # 297.

At # 274, the photographing preparation switch S ₁ is turned off.
Then, stop the AF motor MO ₂ and set each flag AF
CF, FALF, AFF, RLEF, LCF, FDF,
LCF ₁ is reset to 0, the display for AF is erased, interrupt by the interrupt terminal INT _B (interrupt at the end of CCD integration) is disabled, and power zoom is enabled (ZENF = 1) ( # 278 to # 282). Next, it is determined whether the AE lock switch ALS is ON (# 283). If the AE lock switch ALS is off, both the shooting preparation switch S ₁ and the AE lock switch ALS are off,
Since the AE routine is being repeated for a fixed time (for example, 5 seconds) after both the switches S ₁ and ALS are turned off, the interrupt at the interrupt terminal INT _A is enabled at # 285.
In # 286, the interrupt by the timer is enabled, and the process proceeds to # 298. AE lock switch ALS is turned on in # 283
If so, the process proceeds to # 275.

If the release switch S ₂ is ON in # 273, the exposure control routine (SUB19) is executed. When the exposure control operation is completed and the reset switch S ₄ is turned on, film winding is performed (# 290, # 29).
1). After film winding is completed, reset switch S
_{When 4} is turned off, film winding is stopped (#
292, # 294). Then, the display is restored and waits until the photographing preparation switch S ₁ is turned off (# 294, #
295). When the shooting preparation switch S ₁ is turned off, only the set value is displayed and the process returns to the main routine (# 2
96).

Next, each subroutine in the S ₁ routine will be described. First, the lens communication routine (SUB
14) will be described with reference to FIGS. When this subroutine is called, the port P ₂₂ is first set to "High".
Then, the bidirectional signal line LBL is used as a signal transmission line from the body to the lens (# 331). Then, it is determined whether the mounted lens is a new lens (# 332). For new lenses, ICPB setting subroutine (SUB2
0) is executed, and if it is not a new lens, the process proceeds to # 345.

Here, the ICPB setting subroutine (S
UB20) will be described with reference to FIG. In this subroutine, it is first determined whether the shooting preparation switch S ₁ or the AE lock switch ALS is ON (# 361, #
362). If any of the switches S ₁ or ALS is ON, data 010101 * 0 indicating the lens data input is transferred to the switch S ₁ , A
If LS is also OFF, the body is inactive and the data 010001 * 0 indicating the lens data input is set in the body status ICPB (# 363, # 364). And
The first bit b ₁ = * of the body status ICPB is set to b ₁ = 1 to indicate that power zoom is possible if the zoom enable flag is ZENF = 1, and b ₁ = 0 to indicate that power zoom is not possible if ZENF = 0. (# 365- #
367).

Returning to the flow of FIG. 25, in # 333, the data pointer is set to DPO = 16 _H. This means that 6-byte data from the first address AD1 is designated as the read data from the lens. # 334
Then, the mode buffer MOB is set. Then, the contents of the body status ICPB, the data pointer DPO, and the mode buffer MOB are sent to the lens, and the lens status IC is exchanged for the body status ICPB.
PL is received from the lens, and data of the open aperture value Avo is received from the lens in exchange for the mode buffer MOB (# 335 to # 341). Then, the minimum aperture value Avma
x, aperture deviation ΔAv, conversion coefficients K _L and NDC, and focal length f are input from the lens, and the lens select signal CSL is returned to the “High” level (# 351,
# 352).

On the other hand, if # 332 is not a new lens, then #
The lens status ICPL and the open aperture value Avo are input in 345 to # 348, and the remaining lens data (Avmax to f) is input in the same manner in # 351. This is because the body status ICPB, the data pointer DPO, and the mode buffer MOB cannot be received unless the lens is a new lens.

When the above data communication is completed, both the photographing preparation switch S ₁ and the AE lock switch ALS are turned off.
Is determined (# 353, # 354). If both switches S ₁ and ALS are off, port P
_{22 is set} to "Low" level and bidirectional signal line LBL
Is a signal transmission line from the lens to the body, and the process returns (# 355). If either the shooting preparation switch S ₁ or the AE lock switch ALS is ON, # 355 is skipped and the process returns. In this case, the bidirectional signal line LBL is a signal transmission line from the body to the lens.

Next, the zoom routine (SUB15) will be described with reference to FIGS. 28 and 29. In this subroutine,
First, O of the tele switch TeS or the wide switch WiS
It is determined whether or not the N signal is input (# 37
1). If the ON signal is input in # 371, # 372
Then, it is determined by the flag TWF whether or not the ON signal is input for the first time. This flag TWF is TW when the tele switch TeS or the wide switch WiS is ON.
F = 1 and TWF = 0 when both the tele switch TeS and the wide switch WiS are OFF. # 37
If TWF ≠ 1 in 2, it means that the state has changed from OFF to ON. In this case, whether or not power zoom is possible is determined in # 373 by the zoom enable flag ZENF. If power zoom is possible, TWF = 1 is set, the lens high voltage V _LEH is supplied (PWCL ₁ = “Low”), the focus display is erased, and the flags AFCF and FALF are set to 0.
And returns (# 374 to # 377). # 372
If TWF = 1, the zoom switch T has been used for a long time.
It means that eS or WiS was turned on, and #
Steps 373 to # 377 are skipped and the process returns. # 37
If 3 and the zoom enable flag ZENF is not 1,
Zoom TeS or WiS switch from OFF to ON
Even if it becomes, the power zoom is impossible, so # 3
74 to # 377 are skipped and the process returns.

In # 371, the tele switch TeS and wide are set.
If both switches WiS are OFF, switch from ON to OFF
It is determined by the flag TWF whether or not it has changed (# 38
0). Unless TWF = 1, it remains OFF
Therefore, it returns as it is, and if TWF = 1,
It means that it has changed from ON to OFF, so TW
F = 0 and lens high voltage V_LEHThe power supply to (PW
CL₁= “High”) (# 381, # 38
2). Next, execute the offset routine (SUB13)
Shift of the focusing lens due to zooming (off
Set amount N_L) Is corrected. And shooting preparation switch
S₁It is determined whether or not is ON (# 383). Shooting preparation
Itch S₁If is OFF, return as it is and shoot
Preparation switch S ₁If is ON, charge accumulation (product of CCD)
Minutes) and interrupt terminal INT_BInterrupt (product of CCD
The focus lens is
Offset amount N_LFocus has been achieved due to the movement of
AF operation to confirm whether or not
Perform it and return with ZENF = 0 (# 3
84- # 386).

Next, the lens switch routine (SUB1
6) will be described with reference to FIGS. 30 and 31. In this subroutine, it is first determined whether or not the lens switch is ON (# 391). If the lens switch is ON, WIM
It is determined whether or not (wide mode) (# 392). WI
If it is M (wide mode), it is determined whether the lens is a type I lens (fixed focus lens or manual zoom lens) (# 393). If it's a type I lens,
Return as it is. If it's not a type I lens,
It is determined whether the shooting preparation switch S ₁ is ON (# 39).
4). If the shooting preparation switch S ₁ is ON, it is determined whether or not the low control flag LCF is 1 (# 395). If the low contrast flag LCF is not 1, it is determined that focus detection is possible, and the process directly returns. Then, in # 394, the shooting preparation switch S ₁ is OFF, or in # 395.
When the low control flag is LCF = 1 and focus detection is not possible, it is determined whether the lens switch flag LSF is 1 (# 396). Lens switch flag LSF
If it is not 1, it means that the lens switch has changed from OFF to ON. Therefore, the lens switch flag LSF is set to 1, the AF motor MO ₂ is stopped, and the zoom lens is moved to the wide end. For high voltage V _LEH for power supply (PWCL ₁ = “Low”) (#
397- # 399). Then, the interruption to the interruption terminal INT _B (interruption due to the completion of CCD integration) is prohibited, and the flag A
Return FCF and FALF as 0 (# 400,
# 407).

If the lens switch flag LSF is 1 in # 396, it means that the lens switch has been turned on before, and it means that the WIM (wide mode) operation has already been performed. It is determined whether or not zooming to the wide end has been stopped (# 401). If zooming is not stopped, it returns as it is. If the zooming is stopped, the power supply of the lens high voltage V _LEH is stopped (PWCL ₁ = “Hi
gh ″) to stop the zoom motor MO ₃ (# 402). Then, in order to correct the focus shift amount (offset amount) of the focusing lens due to zooming, an offset routine (SUB16) is executed, and a shooting preparation switch is executed. Determine whether S ₁ is ON (#
403). If the shooting preparation switch S ₁ is OFF, the process directly returns, and if the shooting preparation switch S ₁ is ON, C
The charge accumulation (integration) of the CD is started, the interruption to the interruption terminal INT _B (interruption due to the completion of the integration of the CCD) is allowed, and the focus lens moves the offset amount N _L , so that the focus is brought into focus. An AF operation is performed to confirm whether or not the state is corrected to match, and ZENF = 0 is set, and the process returns (# 404 to # 406).

If it is not WIM (wide mode) in # 392, it is determined whether or not the lens switch flag LSF is 1 (# 409). If LSF = 1 is not set in # 409, it means that the lens switch has changed from OFF to ON, LSF = 1 is set in # 410, and A is set in # 411.
It is determined whether or not it is LM (AE lock mode). ALM
If it is (AE lock mode), LALM = 1 in # 412.
And return. The flag LALM is a flag indicating that the AE lock is performed by the operation on the lens side. # 4
If not 11 and ALM (AE lock mode), # 41
At 3, it is determined whether or not the mode is RLPM (release priority mode). If it is RLPM (release priority mode) in # 413, RLEF = 1 is set in # 414 and the process returns. This flag RLEF is a flag indicating that the release priority mode is set. When it is not RLPM (release priority mode) in # 413, the process directly returns. Also,#
If LSF = 1 at 409, it means that the lens switch remains ON, and therefore the process directly returns.

If the lens switch is OFF in # 391, it is determined whether or not it is in WIM (wide mode) (# 41).
6). If it is WIM (wide mode), it is determined whether the lens is a type I lens (fixed focus lens or manual zoom lens) (# 417). If it is a type I lens, it returns as it is. If it is not a type I lens, it is determined whether the lens switch flag LSF is 0 (# 418). Lens switch flag LS
If F is not 0, it means that the lens switch has changed from ON to OFF. Therefore, LSF = 0 is set, and the high voltage V for the lens is used to restore the original focal length from the wide end.
_LEH power is supplied (PWCL ₁ = “Low”), interrupt by the interrupt terminal INT _B is disabled, and the process returns (# 4
19- # 421). Further, the flags AFCF and FALF are set to 0 (# 407). If the lens switch flag LSF is 0 in # 418, the lens switch has been OF
Since it has been F, the process shifts to # 401, it is determined whether the zoom is stopped (returned to the original focal length), the above-described operation is performed, and the process returns.

If it is not WIM (wide mode) in # 416, it is determined whether or not the lens switch flag LSF is 0 (# 425). If the lens switch flag LSF is 0, it means that the lens switch remains off, and the process returns. If the lens switch flag LSF is not 0 in # 425, it means that the lens switch is changed from ON to OFF. Therefore, in # 426, the flags LSF, LALF, and RLEF are set to 0.
To return.

Next, a photometric data input routine (SUB1
7) will be described with reference to FIG. In this subroutine,
First, each photometric data is input, and the photometric error and the aperture value are corrected (# 431, # 432). Next, by operating the switch of the body or lens, the AE lock switch A
Judge whether LS changed from OFF to ON, and
If it changes from FF to ON, the manual AE lock completion flag MALF is set to 1 and the photometric data is registered in the register MLR.
(# 433, # 434, # 439, # 44)
0). Here, the register MLR is a register for inputting photometric data when the manual AE is locked. If both the body and lens AE lock switches ALS are OFF, it is determined whether or not the lens AE lock flag LALF is 1 (# 435). If LALF = 1, the process proceeds to # 434. If LALF = 1 is not set, MALF = 0,
The AF completion flag AFCF is determined (# 436, # 44).
2). Further, even when the AE lock switch ALS is still ON, the process proceeds from # 434 to # 442 to determine the AF completion flag AFCF. If the AF completion flag AFCF is 1, the AF / AE completion flag FALF is determined (# 444). If the flag FALF is not 1, it means that the AF completion flag AFCF has changed from 0 to 1, so that FALF = 1 is set and the photometric data is set in the register FLR (# 445, # 446). Here, the register FLR is a register for inputting photometric data when the AF / AE is locked, and stores the first photometric data after focusing.
If the flag FALF is 1 in # 444, the photometric data is set in the register NMR in # 447. Also, in # 442, A
If FCF = 0, AF / AE lock completion flag FAL
F is set to 0, and photometric data is set in the register NMR (# 443, # 447). Here, the register NMR is a register for inputting ordinary photometric data. That is, if the AE lock switch ALS changes from OFF to ON, the AF completion flag AFCF is set in the register MLR.
When 0 changes from 0 to 1, photometric data is set in the register FLR, and in other cases, photometric data is set in the register NMR. Then, the register MLR in the AE lock state by the AE lock switch, the register FLR in the AE lock state by focusing, and the NMR content in the other states are the calculation photometric data Bvci (i = 1 to 6), and the photographing magnification β, Focal length fv, photometric data Bvci
From (i = 1 to 6), the brightness of the main subject and the subordinate subject is calculated (# 450 to # 455).

Next, the exposure calculation subroutine (SUB1
8) will be described with reference to FIGS. 33 and 34. In this subroutine, it is first determined whether or not a flash is attached (# 461). # 4 if a flash is attached
Move to 62, # 4 if no flash is attached
In step 81, it is determined by the AF lens mounting flag LLF ₁ whether or not the dedicated AF lens is mounted. If the dedicated AF lens is not attached in # 462, the process proceeds to # 463 to determine whether or not the M mode (manual mode). # If it is M mode in 463, #
In 465, the manual setting value is limited by the tuning limit speed Tvx, and if it is not the M mode, the shutter speed Tv is set in # 464.
Is returned as the tuning limit speed Tvx. If the dedicated AF lens is attached in # 462, it is determined whether or not it is a type II lens (a normal zoom lens that is not a varifocal lens) (# 469). If it is a type II lens, it is determined whether it is EXZM (zoom between exposures) (# 47).
0). If it is the zoom EXZM between exposures, the subroutine (SUB21) of the EXZM flash is executed.

This subroutine will be described with reference to FIG. First, the exposure value Ev is calculated with respect to the luminance of the sub-subject, the predetermined shutter speed Tvz ₁ is given priority, and the aperture value Av = Ev−Tvz ₁ is calculated (# 491, # 49).
2). Here, the predetermined shutter speed Tvz ₁ corresponds to the exposure time during which zooming can be performed while the shutter is fully open. If the calculated aperture value is Av <Avo, the aperture value Av is limited to the maximum aperture value Avo, and Ev−
Avo = Tv (# 493, # 494, # 49
5). Further, the calculated aperture value is Avo ≦ Av ≦ Avmax
Then, the predetermined shutter speed Tvz ₁ is used as it is as the control shutter speed Tv (# 493, # 496, #
499). Furthermore, if Av> Avmax, Av-Av
It is determined whether max = d is d ≦ l with respect to the film latitude l (# 497, # 498). If d ≦ l, the process proceeds to # 499, and if d> l, the proper exposure cannot be compensated. Therefore, an EXZM non-warning (for example, blinking of the EXZM display) is performed, and Ev + l−Avmax = Tv is calculated and calculated. The shutter speed Tv is limited to the tuning limit speed Tvx, the aperture value Av is limited to the minimum aperture value Avmax, and the process returns (# 500 to # 504).

Returning to the flow of FIG. 33, if the lens is not a type II lens in # 469 or is not EXZM (zoom between exposures) in # 470, the process proceeds to the steps from # 471 and subsequent steps, each exposure mode and AE. Tv, A according to lock
Calculate v. First, in # 471, it is determined whether or not the M mode (manual mode). In M mode, #
Similar to 465, the shutter speed is limited (# 47
2). If it is not the M mode, it is determined whether or not it is the A mode (aperture priority AE mode) (# 473). In the A mode, the synchronizing speed Tvx is set as the shutter speed Tv, and the set aperture value Avs is set as the aperture value Av (#
474- # 475). If it is not the A mode, it is determined whether or not the manual AE lock flag MALF is 1 (# 4
76). If MALF = 1, the shutter speed Tv and the aperture value Av are determined from the sub-subject luminance. Here, a low shutter speed is also possible. Unless MALF = 1, the shutter speed Tv and the aperture value Av are calculated from the sub-subject luminance.
However, the shutter speed Tv is limited by the synchronization speed Tvx. EXZM flash subroutine (SUB
21), # 475, # 477 or # 478 to # 479.
Then, the process returns to the step of calculating the correction amount of the flash dimming amount according to the difference between the control value of Tv and Av (corresponding to the subordinate subject luminance) and the main subject luminance and the photographing magnification.

In natural light mode, # 461 to # 481
If it is not the dedicated AF lens, the set shutter speed Tvs in the M mode is set to the control shutter speed T.
v, and if not in M mode, (main subject brightness) + Sv
= Tv is returned (# 482 to # 484). #
If it is a dedicated AF lens at 481, it is determined whether or not it is a type II lens (a normal zoom lens that is not a varifocal lens) (# 485). If it is a type II lens, it is determined whether it is EXZM (zoom between exposures) (# 486). If the lens is not a type II lens in # 485, or if it is not EXZM in # 486, the exposure control mode (P mode, S
The exposure calculation is performed according to the mode, the A mode, or the M mode) and the process returns. If it is a dedicated AF lens, a type II lens, and EXZM (zoom between exposures), # 4
After passing through 81, # 485, and # 486, the process shifts to a subroutine (SUB22) for zooming during exposure by constant light.

This subroutine will be described with reference to FIG. First, obtain the exposure value Ev based on the brightness of the main subject,
Predetermined shutter speed Tvz ₂ (Tvz ₂ <Tvz ₁ )
And the aperture value Av is calculated (# 511, #
512). If the obtained aperture value is Av <Avo, the aperture value Av is limited to the maximum aperture value Avo, and Ev-A
Vo = Tv is set (# 514, # 515). If the calculated aperture value is Avo ≦ Av ≦ Avmax, the predetermined shutter speed Tvz ₂ (Tvz ₂ <Tvz ₁ ) is used as it is as the control shutter speed Tv (# 513, # 51).
6, # 519). Furthermore, if Av> Avmax, Av
-Avmax = d is d≤l for film latitude 1.
It is determined whether or not it is 1 (# 517, # 518). If d ≦ l, proceed to # 519, and if d> l, Ev + l−Avm
ax = Tv is calculated, and the aperture value Av is set to the minimum aperture value Avma.
EXZ because it is limited to x and cannot compensate for proper exposure.
An M prohibition warning (for example, blinking of EXZM display) is performed and the process returns (# 520 to # 522).

Here, the reason why Tvz ₂ <Tvz ₁ is set is that when a core image is exposed, the flash image is instantaneously exposed by the light emission of the flash when natural image is exposed. This is because with (steady light), it is necessary to stop zooming for a predetermined period of time for exposing the core image. In addition, each shutter speed Tv described above
z ₁ and Tvz ₂ may be changed according to a zooming range of the lens or a code (not shown in the embodiment) indicating what kind of lens the lens is. Furthermore,
The photographer may set the zooming range and set the value according to the setting range. Further, in the embodiment, the limitation on the long time side is not performed, but the limitation on the long time side may be performed in order to avoid having two cores.

Next, the exposure control routine (SUB19) will be described with reference to FIGS. 37 and 38. In this subroutine, first the display in the viewfinder is erased, and the AF motor M
O ₂ is stopped, and power supply of the high voltage V _LEH for the lens is stopped (PWCL ₁ = “High”) (# 531 to # 5).
33). Then, it is determined whether the lens is a type II lens (# 534). E for a type II lens
It is determined whether or not it is XZM (zoom between exposures) (# 53).
5). In the case of a type II lens and EXZM (zoom between exposures), data (ICPB ₅₄ = 10) indicating that the exposure control operation is being performed is set in the body status ICPB and sent to the lens (# 536 to # 540). In addition, the high voltage V _LEH for the lens is supplied (PWCL ₁ = “Lo
w ″), start zooming toward the shortest focal length (# 541), and from the lens, the lens status I
Each time the CPL is input (# 542 to # 546), it is determined whether zooming is stopped (# 547). When it is determined that the zoom reaches the wide end and the zooming is completed, the power supply of the lens high voltage V _LEH is stopped (PWCL
₁ = "High") to stop zooming (#
548). In addition, it is not a type II lens, or E
# 536 to # 54 if not XZM (zoom between exposures)
Skip 8 (zoom between exposures) and proceed to # 551.

In # 551 to # 556, the light control amount data (Sv-Kc) (Kc is correction data ≧ 0) is sent to the photometric interface LMIF, and the number of aperture steps (Av-Av).
o) is preset in the counter to enable the counter interruption, the port P _{18 is set} to “High” level and the release magnet (= Mg ₁ ) is operated so that the encoder ENC outputs a pulse according to the amount of narrowing. Let me wait. When the planned amount is narrowed down, a counter interrupt is applied, and the counter interrupt process is performed.

This counter interruption will be described with reference to FIG. When this interrupt occurs, it is first determined whether or not AF is in progress (# 701). If AF is in progress, a pulse corresponding to the rotation amount of the AF motor MO ₂ is output from the encoder ENC, and an interrupt has occurred due to the count-up of that pulse, so the AF motor stop processing of # 771 and below is performed. . If the AF is not in progress, the encoder ENC outputs a pulse corresponding to the amount of narrowing by the narrowing lever 11, and since the interrupt is generated by counting up the pulse, the narrowing stop processing of # 702 and thereafter is performed.
In # 702, the stop-stop magnet ApMg (Mg
₂ ) is activated, and port # _{18 is set} to "Low" in # 703.
As a level, a pulse corresponding to the rotation amount of the AF motor MO ₂ is output from the encoder ENC, and the process returns.

When a certain time has passed since the release magnet was turned on and the time when the mirror-up ends, the front curtain traveling start magnet 1CMg (= Mg ₃ ) is operated to start traveling of the front curtain ( # 556, # 55
7). Then, it is determined whether the lens is a type II lens (# 558). EX for Type II lenses
It is determined whether it is ZM (zoom between exposures) (# 559).
If it is not a type II lens or it is not EXZM (zoom between exposures), the exposure time is counted, and at the end of the count, the rear curtain traveling start magnet 2CMg (= Mg ₄ ) is operated to start the rear curtain traveling. Let LEN be “High”
Return as "h" level (# 566, # 567,
# 568). In the case of flash photography during this period, flash emission is started when the synchro switch Sx is turned on, and is stopped when the amount of light received by the emission reaches a predetermined amount.

# 558 is a type II lens, and
If it is EXZM (zoom between exposures) at 559, different times t ₁ and t ₂ (t ₁ <t ₂ ) between flash photography and natural light.
Is counted (# 560 to # 562). The times t ₁ and t ₂ are times for exposing the image serving as a nucleus. t ₁
Corresponds to the time when the shutter is fully opened and the flash fires. Since t ₂ is the time required to expose the core image with natural light, it is longer than t ₁ . Then, when t ₁ or t ₂ elapses, the high voltage V _LEH for the lens is fed (P
WCL ₁ = “Low”) is performed to start zooming (# 563). Then, at # 564, Tv = log
Than ₂ (1 / T), the remaining time (T-t ₁₎ or (T-
t ₂ ) is counted, and when the counting is completed, the power supply of the lens high voltage V _LEH is stopped at # 565 (PWCL ₁ = “H
Then, the zooming is stopped and the process proceeds to the processing of # 567 and thereafter. Although the zooming direction is from the wide side to the tele side, the zoom side may be switched from the tele side to the wide side.

Next, the AF operation will be described. AE
When charge accumulation (integration) of the CCD is completed during the operation of the routine and an interrupt signal is input to the interrupt terminal INT _B , FIG.
The interrupt processing of # 581 and subsequent steps of No. 9 is performed. First, data obtained by A / D converting the charges accumulated in the CCD are sequentially fetched, and it is determined whether or not the photometry calculation incomplete flag LMF is 1 (# 581,
# 582). If LMF = 1, the first photometry, calculation, and display operation has not been completed, so FDF = 1 is set and the process returns to the return address (# 583). If LMF is not 1, the defocus amount and the defocus direction are calculated, and it is determined whether or not there is reliability (# 584, # 585). If it is reliable, it was reliable in the detection up to that time (LC
It is determined whether or not F = 0) (# 586). If LCF = 0, it means that there was reliability in the first detection or the detection up to that time, so that the process proceeds to # 601.

In # 601, the calculation of DF × K _L × K _B = N _B is performed to obtain the motor rotation amount N _B (the number of pulses from the encoder) for eliminating the defocus amount DF.
In 02, the shooting distance D is calculated based on the motor rotation amount N _B , the contents of the current position register NCR, and the coefficient NDC for converting the rotation amount N from the ∞ position into the shooting distance D. Then, it is determined whether or not it is a new lens (# 603). If it is a new lens, it is determined whether it is a type I lens (# 60).
4). If it is not a type I lens, it is a lens capable of AZP (auto zoom program), so it is determined whether or not it is the AZP mode (# 605). # 60 if it is not a new lens, a lens (Type I) capable of AZP (auto zoom program), or not in AZP mode
3, the processing proceeds from # 604 or # 605 to # 626 to calculate the photographing magnification β, and in # 627, the motor rotation amount N _B for eliminating the defocus amount DF is substituted for the rotation amount N,
At 628, the rotation amount N is added to or subtracted from the contents of the current position register NCR according to the sign, and the process proceeds to the drive amount determination routine (SUB23).

On the other hand, with the new type II or III lens
When performing AZP (auto zoom program),
Body status output indicating body data output during AF operation
Send itus ICPB and shooting distance D to the lens (# 606
~ # 612). After waiting for a predetermined time, the body performs AF operation
Body status ICPB showing lens data input in
And 4 bytes of lens data from the fifth address AD5
Data pointer DPO = 54 that specifies input_H
To the lens and wait for a certain time (# 613 to # 61
9). During this time, the lens is AZP₁~ AZP₃In the case of
Determines the shooting magnification β according to the shooting distance D, and
Focal length f_AAsk for. MLM (shooting times
Ratio lock mode), set shooting magnification β_LWhen
Focal length f to zoom from shooting distance D_ASeeking
It This focal length f_AThe conversion coefficient NDC according to
In case of varifocal lens (Type III)
Is the focal length f at that time and the focus for zooming.
Point distance f_AAnd the shooting distance D from the offset amount N_LSeeking
It Then, in # 620 to # 623, the conversion coefficient NDC (f
_A) And the focal length f for zooming_A, Shooting magnification β and
And offset amount N_LEnter, and press N at # 625._B± N_L×
K_B= N is calculated, and the AZP (off
After zooming with the auto zoom program)
The rotation amount N required to reach the in-focus position is calculated.

Next, the drive amount determination routine (SUB23)
Will be described with reference to FIGS. 42 and 43. In this subroutine, first, it is determined whether or not it is a new lens (# 641). If it is a new lens, it is determined whether it is a type I lens (# 6
42). If it is not a type I lens, it is a lens capable of AZP (auto zoom program).
It is determined whether or not the mode is set (# 643). # 64 if it is not a new lens, a lens (Type I) for which AZP (auto zoom program) is disabled, or not in AZP mode
From 1, # 642 or # 643 to # 671, the focus is determined. On the other hand, with the new type II or III lens, A
When performing ZP (auto zoom program), # 6
Then, the process moves to 44 to focus.

First, if the focus is not focused in # 671, the rotation amount N is preset in the counter, and the counter interruption is enabled.
The AF motor MO ₂ is driven in the driving direction, and the process proceeds to the AE routine (# 685- # 687). If it is in focus in # 671, the body is in a calculation operation, body data is output, power zoom is possible, and AF is inactive. Body status ICPB =
01010010 and shooting distance D are sent to the lens, AFC
After setting F = 1 and ZENF = 1 and displaying the focus, AE
The routine proceeds to the routine (# 672 to # 681).

Next, if the focus is determined in # 644, it is determined whether or not the current focal length f ₀ is equal to the calculated focal length f _A (# 655). If f ₀ = f _A, it means that the operation of the AZP (automatic zoom program) is completed, and it is determined that the focus is achieved, and the process proceeds to # 672 and thereafter. Also,#
If f ₀ = f _{A is} not _satisfied at 655, the lens high voltage V _LEH is supplied for zooming (PWCL
₁ = “Low”), the body status ICPB indicating the body data output is sent to the lens during the AF operation, and the lens status ICPL is simultaneously input by the bidirectional status communication (# 656 to # 662).

At # 633, it is determined whether the zoom is stopped. If the zoom is not stopped, the process returns to # 658 after waiting for a certain period of time in # 664. On the other hand, if the zoom is stopped at # 633, the power supply of the lens high voltage V _LEH is stopped (PWCL ₁ = “High”), and the charge accumulation of the CCD is performed to perform the focus detection for confirmation and the AF operation. (Integration) is started, interrupts are enabled by the interrupt terminal INT _B , and the process proceeds to the AE routine (# 665 to # 667).
Here, the reason why AF for confirmation is necessary is that the current focal length f ₀ and the calculated focal length f _A are used when the offset amount N _L is calculated in the lens, but this is continuous. This value is not the above value but a discrete value corresponding to the resolution of the code plate, and since the offset amount N _L with a fine precision cannot be calculated, AF for confirmation is performed.

If the image is not in focus in # 644, f is obtained in # 645.
It is determined whether ₀ = f _A. And f ₀ = f _A
If so, the process proceeds to # 685. On the other hand, if f ₀ ≠ f _A , it is determined whether the content of the battery check register is BCR = 11 (# 646). AF if BCR = 11
Since the motor MO ₂ and the zoom motor MO ₃ can be driven simultaneously, the lens high voltage V _LEH is supplied at # 650 (PWCL ₁ = “Low”), and the process proceeds to # 685. On the other hand, if BCR ≠ 11, in order to alternately drive the AF motor MO ₂ and the zoom motor MO ₃ at regular time intervals, a predetermined value M is set in the timer register TIR, the timer is reset / started, and the timer allocation is started. Including allowed, #
Then, the AF motor MO ₂ is driven (#
647- # 649).

Returning to the flow of FIG. 39, if it is determined in # 586 that the past focus detection result is unreliable (LCF = 1), it is highly possible that low contrast scanning is being performed. In order to stop the MO ₂ and start the remeasurement, the charge accumulation (integration) of the CCD is started and the interruption by the interruption terminal INT _B is enabled (# 587 to # 58).
9). Then, it is determined whether or not the scan direction is reversed, and if the scan direction is reversed, the counter content is subtracted from the current position register NCR monitoring the pulse from the encoder ENC, and the scan direction must be reversed. For example, the contents of the counter are added (# 590 to # 59
2). Further, the warning display indicating that focus detection is not possible is erased, the flags LCF and LCF ₁ are set to 0, and the process proceeds to the AE routine (# 593, # 594).

On the other hand, if it is determined that there is no reliability in # 585, the low contrast determination of # 711 and thereafter shown in FIG. 45 is performed. First, it is determined whether or not the low control flag LCF is 1 (# 711). If LCF is not 1 in # 711, it is determined that there is no reliability for the first time.
In # 714, LCF = 1 is set, the AF motor MO ₂ is driven in the direction in which the lens is approaching, the content of the counter is reset to 0, and the flow proceeds to # 725. # 711 for LCF =
If it is 1, it is determined whether or not the entire low contrast flag LCF ₁ is 1 (# 715). If LCF ₁ = 1 is not set, it is determined whether or not the low-con scan is in progress and whether it is the end (# 71).
6). LCF ₁ = 1 in # 715, or # 716
If it does not end with, the process proceeds to # 725. If it is the end at # 716, the AF motor MO ₂ is stopped and it is determined whether or not the scanning direction has already been reversed (# 717, # 71).
8). If the scan direction is not reversed, # 719-
In # 721, the content of the counter is set to NCR, the AF motor MO ₂ is driven in the ∞ direction, the counter is reset to 0, and the process proceeds to # 725. If the scan direction has already been reversed in # 718, it means that the focus lens has reached the ∞ position while focus detection is not possible.
At 24, the current position register is set to NCR = 0, the whole area low contrast flag LCF _{1 is set} to 1, the warning display is turned ON, and #
Move to 725. # 725 CCD for re-measurement
Charge accumulation (integration) is started, interrupt is permitted to the interrupt terminal INT _B upon completion of integration in # 726, and the process returns to the AE routine.

Next, a flowchart of timer interruption will be described with reference to FIGS. 46 and 47. When a timer interrupt occurs, the contents of the timer register TIR is decremented by 1 and TI
It is determined whether or not R = 0 (# 731, # 73
2). If TIR ≠ 0, the scheduled time has not elapsed, so the timer is reset and started (# 73
3). If the timer is a fixed time after the shooting preparation switch S ₁ is turned off, the INT _A interrupt is permitted (# 73).
4, # 735). If the timer is in the AF mode, counter interruption is enabled (# 736, # 737). And
The timer interrupt is permitted and the process returns (# 738).

At # 732, the contents of the timer register are TI.
When R = 0, the shooting preparation switch S₁Is ON
It is determined whether or not (# 741). Shooting preparation switch S₁
If it is a timer after turning off, each flag LAL
Reset F, BALF, FALF, MALF, LMF
Then, only the set value is displayed, and the booster circuit DD in the body is displayed. ₁
Stop (PWCB = "High"), and the high
Pressure V_LEHPower supply to (PWCL₁= "Hig
h "), port P_{twenty two}Is set to "Low" level and the interrupt terminal
INT_AThe operation is terminated by allowing an interrupt by (# 74
2 to # 746). On the other hand, in # 741, the shooting preparation switch S
₁If is turned on, it means that the timer is in AF
Motor MO₂And zoom motor MO₃Switch.
Counter interrupt is enabled in # 747 and AF mode is selected in # 748.
Ta MO₂Is ON. AF motor MO₂But
If ON, AF motor MO₂OFF, for lens
High voltage V_LEHPower supply (PWCL₁= “Low”)
This starts zooming (# 749, # 750). So
Then, in # 751 to # 756, by bidirectional status communication
Read the lens status ICPL, and then use # 757.
To determine if the game is complete. Zoom ends
If so, the AF motor MO is executed in # 758 and # 759.₂of
Start driving, high voltage V for lens_LEHTo stop the power supply
(PWCL₁= “High”), for processing # 763 and below
Transition. If the zoom is not finished, # 758, #
759 is skipped and the process proceeds to # 763 and the subsequent steps.
On the other hand, in # 748, the AF motor MO₂If is OFF,
High voltage V_LEHPower supply to (PWCL₁= "H
IG ”), AF motor MO₂Start driving the TIR
Set M = M, reset and start the timer, and
Allows Mar interrupt and returns (# 761 to # 76
5).

Next, the counter interruption routine will be described with reference to FIG. When this counter interrupt occurs, first,
It is determined whether or not AF is in progress (# 701). AF in # 701
For the operation when not in the middle (stop operation of narrowing down),
As described above. If AF is being performed in # 701, it means that the focusing lens has been moved by the planned drive amount, so the AF motor MO ₂ is stopped (# 771). Next, it is determined whether or not it is a new lens (# 772). If it is a new lens, it is determined whether it is a type I lens (# 77).
3). If it is not a type I lens, it is a lens capable of AZP (auto zoom program), so it is determined whether or not it is the AZP mode (# 774). # 77 if it is not a new lens, a lens (Type I) for which AZP (auto zoom program) is disabled, or not in AZP mode
2, from # 773 or # 774 to # 786, C
The charge accumulation (integration) of CD is started, the interruption to the interruption terminal INT _B upon completion of the integration is permitted in # 787, and the process returns to the AE routine. On the other hand, when performing AZP (auto zoom program) with a new type II or III lens, B
It is determined whether CR = 11 (# 775). If BCR ≠ 11 in # 775, high voltage for lens V _{LEH in} # 776
Power is supplied (PWCL ₁ = “Low”) to start zooming, and after waiting for a predetermined time at # 777, the process proceeds to # 778 and thereafter. On the other hand, if BCR = 11, the AF motor MO ₂ and the zoom motor MO ₃ are being driven at the same time, and the process immediately proceeds to # 778 and subsequent steps. # 778 ~
In # 782, the lens status ICPL is input by bidirectional status communication, and in # 783, it is determined whether or not the zoom is stopped. If the zoom is not stopped at # 783, a predetermined time is waited at # 784 and the process returns to # 778. If the zoom is stopped in # 783, the power supply of the lens high voltage V _LEH is stopped in # 785 (PWCL ₁ = "H").
# 78 ”to perform focus detection for confirmation.
In step 6, the charge accumulation (integration) of the CCD is started, and in # 787, the interruption to the interruption terminal INT _B upon completion of the integration is permitted.
Return to the E routine.

Next, the lens routine (SUB6) is shown in FIG.
9 shows. In this subroutine, the lens data input routine (SUB30) and the zoom routine (SUB1)
5) and the lens switch routine (SUB16) is called in this order. Lens data input (SUB3
The subroutine 0) will be described with reference to FIG. In this subroutine, first, the port P _{22 is set} to "High" level and the bidirectional signal line LBL is used as a signal transmission line from the body to the lens (# 801). Then, the body status ICPB indicating that the body is inoperative, zoomable, and body data output is set, the body status ICPB is sent to the lens by bidirectional status communication, and the lens status ICPL is input from the lens, and the port P
Return ₂₂ to "Low" level and return (# 802
~ # 807).

FIG. 50 shows a subroutine (SUB8) based on activation by turning on the AE lock switch ALS. In this subroutine, first the photometric enable signal LMEN is set to the "Low" level, and then the dedicated A
Whether or not the F lens is attached is determined by the AF lens attachment flag LLF ₁ (# 811, # 812). When the dedicated AF lens is attached, the process proceeds to the AE routine, and when it is not attached, the process proceeds to # 297 (FIG. 21).

Next, the SYS routine (SUB9) called when the system reset key 4 is pressed is shown in FIG.
1, and will be described with reference to FIG. When this subroutine is called, it is first determined by the AF lens mounting flag LLF ₁ whether or not a dedicated AF lens is mounted (#
345). If LLF ₁ = 1 is not set, it means that the dedicated AF lens is not mounted, and the process proceeds to # 856. On the other hand, if LLF ₁ = 1, it means that a dedicated AF lens is mounted, and the focusing lens is retracted to the ∞ position (# 816 to # 819). That is, the drive of the AF motor MO ₂ is started toward the ∞ position, the operation of determining whether it is the end or not is repeated after waiting for a predetermined time, and if the end is determined, the AF motor MO ₂ is stopped. When the focusing lens is stopped down to the infinity position, # 82
At 0, the current position register is set to NCR = 0, and the lens data input routine (SUB30) is executed. Then, it is determined whether or not the attached lens is a new lens (# 83
1). If it is not a new lens, the process proceeds to # 856. If new lenses, the lens switch mode LMO ₂ is deactivated the function by lens switch as O _H (# 83
2). Then, data 01110010 indicating system reset, body data output, and power zooming is set in the body status ICPB (# 833). Also,
The lens mode LMO ₁ and the lens switch mode LMO ₂ are set in the mode buffer MOB (# 834). #
835 to # 842 set the body status IC
Send the contents of PB and mode buffer MOB to the lens.
In # 843, the lens switch mode LMO ₂ is displayed. Here, since the function by the lens switch is disabled, the display of the lens switch mode LMO ₂ is erased.

Next, in # 851, it is determined whether or not the lens is a type I lens, and if it is a type I lens, the process proceeds to # 855 and the display of the lens mode LMO ₁ is erased. # 85
If it is not a type I lens with # 1, the # 852 EXZM
(Zoom between exposures) is determined. EXZ with # 852
If not M, move to # 854 and move to lens mode LMO
Display ₁ . If it is EXZM in # 852, it is determined whether or not it is a type II lens (# 853). If it is a type II lens, the process proceeds to step # 854 to display the lens mode LMO ₁ . If it is not a type II lens, the process proceeds to # 855 to erase the display of the lens mode LMO ₁ . In the above # 851 to # 854, the lens mode LMO ₁ according to the lens type is displayed. After the lens mode LMO ₁ is displayed or erased in # 854 and # 855, the exposure control mode is set to P in # 856.
The mode (program mode) is set, the set value is displayed in # 857, the switch SYS corresponding to the system reset key 4 is turned off in # 858, and the process returns.

Next, a MOS routine (SUB10) called when the mode switch MOS is turned on by pressing the mode key 3 will be described with reference to FIG. In this subroutine, first, it is determined whether or not the mode register is MOR = 11 (# 861). If MOR = 11,
The process proceeds to # 862 and MOR = 00. MOR = 11
If not, the process proceeds to # 863 and MOR = MOR + 1. Here, the mode register MOR is a 2-bit register for selecting four types of exposure control modes,
P mode (program mode) when MOR = 00,
When MOR = 01, S mode (shutter speed priority A
E mode), when MOR = 10, A mode (Aperture priority A
E mode), M mode (manual mode) is selected when MOR = 11. Therefore, each time the MOS routine is called, the exposure control mode is changed from the P mode to the S mode, from the S mode to the A mode, from the A mode to the M mode, and from the M mode to the P mode. # 8
At 64, the set mode is displayed, and at # 865, the process returns after waiting for the mode switch MOS to be turned off.

Next, the FUS routine (SUB11) called when the function switch FUS is turned on by pressing the function key 2 will be described with reference to FIG. In this subroutine, first, it is determined whether or not a dedicated AF lens is mounted, and the AF lens mounting flag LL.
It is determined by F ₁ (# 871). If LLF ₁ = 1 is not set, the dedicated AF lens is not attached, the process proceeds to # 875, the function register is set to FUR = 00,
Disable the function. # 871 and LLF ₁ =
If it is 1, the dedicated AF lens is mounted, the subroutine for lens data input (SUB30) is executed, and it is determined whether or not it is a new lens (# 872). If it is not a new lens, move to # 875 and disable the function,
If it is a new lens, whether or not FUR = 11 is determined in # 873. If FUR = 11, the process proceeds to # 875 and FUR ≠
If it is 11, the process proceeds to # 874 and 1 is added to the contents of the function register FUR. Here, the function register FUR is a 2-bit register for selecting four types of functions. When FUR = 00, the function is inactive, and when FUR = 01, the function register FUR is AL.
RLP when M (AE lock mode) and FUR = 10
AV when M (release priority mode) and FUR = 11
SM (aperture setting mode) is selected. Therefore, every time this FUS routine is called, the function is inactive → ALM, ALM → RLPM, RLP.
M → AVSM, AVSM → inactive. # 876
Then, the setting contents of the function are displayed, and at # 877, the function switch FUS is waited until it is turned off, and then the process returns.

Next, an up / down routine (SUB1) called by operating the up key / down lever 7
2) will be described with reference to FIGS. 55 and 56. First, the body status ICPB is set with data 01000110 indicating that the body is inactive and the lens data is input, and the data pointer DPO is set with 13 _H (# 881, # 88).
2). Here, the fact that the data pointer is DPO = 13 _H means that lens data of 3 bytes is input from the first address AD1. # 883 to # 8
At 88, the set body status ICPB and data pointer DPO are sent to the lens, and at # 889 to # 894, the lens is opened at the maximum aperture value Avo and the minimum aperture value Avma.
Each lens data of x and aperture value deviation amount ΔAvz is input.

Next, it is determined whether the exposure control mode is the M mode (manual mode) (# 895). In the M mode, it is determined whether the lens switch is ON (# 896). If the lens switch is ON, AVS
It is determined whether or not it is M (aperture setting mode) (# 897).
The lens switch is not ON in # 896, or # 89
If 7 is not AVSM, Manual Av switch MA
It is determined whether S is ON (# 898). # 897 to A
If it is VSM or if the manual Av switch MAS is ON in # 898, the aperture value Av is increased or decreased by 0.5Ev, and the set aperture value Av is limited according to the data from the lens (# 899, # 900). On the other hand, when the lens switch is OFF, the manual Av switch MAS
Is OFF, or even if the lens switch is ON, it is not AVSM (aperture setting mode) but manual A
When the v switch MAS is also OFF, the shutter speed Tv is increased or decreased by 1 Ev (# 90).
1). This shutter speed Tv is also limited to the shortest and longest shutter speeds (# 902).

# 895: M mode (manual mode)
If not, it is determined whether or not it is the A mode (aperture priority AE mode) (# 903). Aperture value A in A mode
v is increased or decreased (# 899, # 900).
If not A mode, S mode (shutter speed priority A
It is determined whether or not it is the E mode (# 904). In the S mode, the shutter speed Tv is increased or decreased (# 901, # 902). If it is not the S mode, it means the P mode (program mode), and the process proceeds to # 905. Also in M mode, A mode, S mode #
The process proceeds from 900 or # 902 to # 905 to display the set value, and if both the up switch UPS and the down switch DOS are OFF in # 906, the process returns.

Next, the operation of the microcomputer CPUL in the varifocal lens will be described. The lens is attached to the body, power supply of the lens low voltage V _LEL is started, and “Lo” is input to the reset terminal REL of the microcomputer CPUL in the lens.
When the w "level reset signal is input, the reset operation shown in Fig. 57 is performed. First, the flag, register, and port are reset in # 1001, the display is erased in # 1002, and the port P _{36 in} # 1003. Is set to a "High" level so that the lens select signal CSL from the body can be input, and the INT ₁ interrupt generated when this signal CSL becomes the "Low" level can be accepted.
Stop the operation. As a result, the lens communication operation described above is awaited.

Next, the lens switches LMS, LE
When any of S, TeS and WiS is turned on
Has an interrupt terminal INT₀Will cause an interrupt. This percent
The loading routine will be described with reference to FIGS. First of all
It is determined whether the power switch LES is ON (# 101
1). Power zoom if lens switch LES is ON
It is determined whether or not (# 1012). Power zoom
For example, determine whether MLM (shooting magnification lock mode)
(# 1013). If MLM, flag LSF₀Is 1
It is determined whether there is any (# 1014). This flag LS
F₀Indicates whether the lens switch LES was previously ON.
This is a flag for determining whether or not. LSF ₀= 1
That is, the lens switch LES remains ON.
Therefore, the routine proceeds to the stop routine. LSF₀Not = 1
Then, the lens switch LES changes from OFF to ON.
That's why the LSF₀= 1 (# 10
15). Then, whether or not the lens switch flag LSF is 1
It is determined (# 1016). This lens switch hula
For LSF, if LSF = 1, the lens switch is set.
Lens switch is reset when LSF = 0
Indicates a state. # 1016 must be LSF = 1
If so, LSF = 1 is set in # 1017 and the stop routine is started.
To go. The lens switch is now in the set state.
Remembered If LSF = 1 in # 1016,
The lens switch LES is already in the mode from OFF to ON
It has changed and the lens switch is in the set state
Therefore, set LSF = 0 and MLF = 0, and lock
Shooting magnification β_LIs erased and the stop routine is entered.
(# 1018 to # 1020). This makes the lens
The switch is stored in the reset state.

If it is not MLM (shooting magnification lock mode) in # 1013, it is determined whether or not it is WIM (wide mode) (# 1025). If it is not WIM, ALM (AE
It is determined whether or not it is the lock mode (# 1026). Further, when it is not PZOOM (power zoom) in # 1012, since it is manual zoom, MLM or WI
The determination of whether M (# 1013, # 1025) is omitted, and A
It is determined whether or not it is LM (AE lock mode) (# 102).
6). If it is not ALM, the process proceeds to the stop routine. #
1025 is determined to be WIM, or # 1026 is ALM
If it is determined that the flag LSF ₀ is 1, it is determined in # 1027. If LSF ₀ = 1 then the lens switch LES remains ON and therefore the routine proceeds to a stop routine. If LSF ₀ = 1 then the lens switch LES has changed from OFF to ON and therefore # 1028. And LSF ₀ = 1 is set, and the lens switch flag LSF is determined in # 1029. If LSF = 1, LSF = 0 is set in # 1031, and if LSF = 1, LSF = 1 is set in # 1030. That is, each time the lens switch LES changes from ON to OFF, the lens switch is alternately switched between the set state and the reset state.
Next, in # 1032, it is determined whether or not the body is inoperative.
If the body is inactive, the ports P ₃₆ and P ₃₅ are set to the “Low” level for a certain period of time in order to inform the body of the state from the lens to the interrupt terminal INT _{A of the} in-body microcomputer CPUB via the bidirectional signal line LBL. Send a start signal,
After that, the ports P ₃₅ and P ₃₆ are returned to the "High" level (# 1033 to # 1037). If the body is not inoperative in step # 1032, the state can be transmitted by the next signal communication, and the routine proceeds to the stop routine.

At # 1011 the lens switch LES is turned on.
If not, it is determined whether the tele switch or the wide switch is ON (# 1041, # 1042). If either is ON, it is determined whether or not it is PZOOM (power zoom) (# 1043). Then, in the case of PZOOM (power zoom), the process proceeds to # 1032 and the above-described operation is performed. If both of the tele switch TeS and the wide switch WiS are OFF, or if any of them is ON but PZOOM (power zoom) is not set, the process proceeds to # 1044 to determine whether the lens mode switch LMS is ON. To judge. If the lens mode switch LMS is OFF, the routine proceeds to the stop routine. Lens mode switch L
If the MS is ON, it is determined whether the flag LSF ₁ is 1 (# 1045). This flag LSF ₁ is LS when the lens mode switch LMS was previously ON.
F ₁ = 1 and LSF ₁ when previously OFF
= 0. If LSF ₁ = 1 in # 1045, it means that the lens mode switch LMS is still ON, and the process proceeds to the stop routine. # 1045 for L
If SF ₁ = 0, the lens mode switch LMS is O
Since it means that it has changed from FF to ON, # 10
At 46, LSF ₁ is set to 1, and at # 1047, it is determined whether or not AZP (auto zoom program). If it is not AZP, the routine proceeds to the stop routine, and if it is AZP, each flag LSF
₀ , LSF, and MLF are reset to 0, and the locked imaging magnification β _L is erased (# 1048 to # 1051). This is a measure to be taken when the mode is switched in the AZP (auto zoom program) when the magnification is locked in the MLM (shooting magnification lock mode).

Next, it is judged whether the contents of the auto-zoom program register are AZR = 100 (# 10).
52). Here, the auto zoom program register AZ
R is a 3-bit register for switching four types of modes in AZP (auto zoom program),
When AZR = 001, the first auto-zoom program AZP ₁ ; when AZR = 010, the second auto-zoom program AZP ₂ ; when AZR = 011, the third auto-zoom program AZP ₃ , and when AZR = 100 MLM (shooting magnification lock mode) is selected. If AZR = 100 (MLM) in # 1052,
In # 1054, AZR = 001 (AZP ₁ ) is set, and # 10
At 58, the lens mode LMO ₁ is displayed and the stop routine is entered. # If 1052 is not AZR = 100, #
At 1053, the content of the auto-zoom program register AZR is incremented by 1, and at # 1055, it is determined whether or not AZR = 100. If AZR = 100 in # 1055, the lens switch LES becomes a switch for locking the photographing magnification, so the lens switch mode LMO ₂
Is erased, the MLM (shooting magnification lock mode) is displayed, and the routine proceeds to the stop routine (# 105).
6, # 1057). If AZR is not 100 in # 1055, the lens mode LMO ₁ (AZP ₁ ~
AZP ₃ ) is displayed and the stop routine is entered.

In the stop routine, the interrupt is enabled and the lens scan
If switch LES is OFF, LSF ₀= 0, lens
If the mode switch LMS is OFF, LSF₁= 0
Then, the operation is stopped (# 1061 to # 1065).

Next, from the body to the lens microcomputer CPU
An interrupt routine called when an "Low" level interrupt signal is input to the L interrupt terminal INT ₁ is shown in FIG.
~ 64 and will be described.

In this interrupt routine, first the lens stay
The task ICPL is set (# 1071 to # 1093).
First, bit b of lens status ICPL₇, B₆
Since this is a new lens, 01 is set (# 1071). Next
First, it is determined whether or not it is PZOOM (power zoom) (#
1072). For power zoom, use # 1073
Bits of status ICPL b₃, B₂, B₁To 10
0 is set, and M is set in # 1075, # 1076, and # 1077.
LM (shooting magnification lock mode) or WIM (wide mode)
Mode) or ALM (AE lock mode). #
If it is not power zoom in 1072, it is in
Bits of status ICPL b₃, B ₂, B₁To 10
Set 1 and ALM (AE lock mode) in # 1077
Or not. # 1075, # 1076, # 107
It is judged as MLM, WIM or ALM in any of 7
If the lens switch flag LSF is 1
It is determined whether or not (# 1078). ALM (AE Rockmo
Mode), once the lens switch LES is OFF
From ON to ON, and then from OFF to ON
During this period, the lens switch flag LSF is 1.
If the lens switch flag LSF is 1 in # 1078,
Lens status ICPL bit b_Five, B _FourTo 11
It is set (# 1089). Lens switch with # 1078
If the flag LSF is 0, the process proceeds to # 1082. # 1
When it is not ALM (AE lock mode) in 077,
RLPM (release priority mode) in # 1079 and # 1080
Mode) or AVSM (aperture setting mode). R
For LPM or AVSM, the lens switch LES
It is determined whether it is ON (# 1081). Lens switch
If LES is ON, move to # 1089
Bit b of status ICPL_Five, B_FourSet to 11
It In # 1079 and # 1080, RLPM and AVSM
If neither, or one of the above
When the lens switch LES is not ON, # 10
Move to 82 and judge whether it is PZOOM (power zoom) or not.
Set. With power zoom, you can zoom from the body
It is determined whether or not a signal is being input (# 108
3). # 1082 is not power zoom, or # 10
In 83, no zoomable signal is input from the body
If so, bit b of lens status ICPL_Five, B
_FourIs set to 00 (# 1087). Power with # 1082
-It is possible to zoom from the body with # 1083.
If the number is being input, # 1084, # 108
Tele switch or wide switch is turned on in 6
Or not. The teleswitch is ON at # 1084
Raba lens status ICPL bit b_Five, B_FourTo 0
1 is set (# 1085). Wide Sui with # 1086
If the switch is ON, bit b of Lens Status ICPL
_Five, B_FourSet to 10. In # 1084, # 1086
If neither the tele switch nor the wide switch is ON, # 1
Moved to 087, bit b of lens status ICPL
_Five, B_FourIs set to 00.

The bit b ₅ of the lens status ICPL in # 1089, # 1087, # 1088 or # 1085.
After setting b ₄ , it is determined in # 1091 whether or not zooming is in progress. If the zoom is in progress, the least significant bit b ₀ of the lens status ICPL is set to 1, and if the zoom is not in progress, the same bit b _{0 is set.}
Is set to 0 (# 1092, # 1093). And
At # 1094, the lens status ICPL is output and the body status ICPB is read.

When the body status ICPB is read,
63 and 64, and it is determined at # 1101 whether or not the body is a new body (ICPB ₇₆ = 01). If it is not the new body, it means that it is the old body, and outputs the lens data Avo to f ₀ , waits for the lens select signal CSL input to the port P ₃₄ to be at the “High” level, and then PZOOM. It is determined whether or not (power zoom), and if the power zoom is set, the power zoom cannot be performed on the old body, and a warning is displayed (# 1102).
~ # 1105). In the case of the old body, terminal J
_{There are only terminals 12} (low voltage V _LEL for lens), J ₁₃ (lens select signal CSL), J ₁₅ (serial input SIN), J ₁₆ (serial clock SCK) and J ₁₇ (ground line G ₁ ). Next, the display of the lens mode LMO ₁ , the lens switch mode LMO ₂ , the current focal length f ₀ , and the shooting distance D is erased, the flag and the register are reset, and the interrupt terminal INT ₁ is enabled for operation. It is stopped (# 1106 to # 1110).

When it is determined in # 1101 that the body is new
Is the body data input (ICPB₂=) Or lens day
Output (ICPB₂= 1) is determined (# 111)
5). If the body data is input, the process proceeds to # 1116, and
Data output, the lens data shown in FIGS.
Data output routine. In # 1116 the body
Inoperative (ICPB₅₄= 00) is determined. body
If is not activated, is the next data in # 1117 the body?
Waiting for input from port P at # 1118
₃₄Waits for "High" level. And Bode
Port P without any data input from₃₄Is "Hig
If it becomes h ”level, the power switch PWS on the body side
Is ON (ICPB₃= 0) is determined (# 111)
9). Power zoom if power switch PWS is ON
Switch to routine (Fig. 65, Fig. 66) and switch to power
If PWS is OFF, the display is erased and stopped at # 1120.
Go to routine.

The power zoom rouch shown in FIGS. 65 and 66.
In the INT₁Of the PZOOM (power
It is determined whether or not it is zoomed (# 1151, # 115
2). With power zoom, you can zoom from the body
No. is being input (ICPB ₁= 1) is determined
Yes (# 1153). # 1152 is not power zoom
Or, in # 1153, a zoomable signal is input from the body
When it is determined that the state is not present, the process proceeds to # 1178.
The current focal length f₀Is displayed and the process returns.
# 1152 and # 1153 are power zoom and body
It is determined that a zoomable signal is being input from
Shooting ready switch S₁Is turned on
It is determined whether or not (# 1154). Shooting preparation switch S
₁If is ON, AZP (auto zoom program)
It is determined whether or not (# 1155). If it is AZP, #
Shift to 1178, and the current focal length f₀To display Rita
To learn. Shooting preparation switch S₁If is OFF, #
1155 is skipped and the process proceeds to # 1156. Also,
Shooting preparation switch S₁Even if is ON, it must be AZP
For example, the process proceeds to # 1156. # 1156, # 1158
Determines whether the tele switch or wide switch is ON.
Set. With # 1156 and # 1158, tele switch and WA
If both id switches are not ON, go to # 1178.
Transition. If the tele switch is ON in # 1156,
Current focal length f in # 1157₀Is the focal length f at the tele end
_TIt is determined whether or not the wide switch is reached in # 1158.
If it is ON, the current focal length f is determined in # 1159.₀Wai
Focal length f_WTo determine if. # 1157
Or f with # 1159₀= F_TOr f₀= F_WDetermined to be
When determined, the process proceeds to # 1178. # 1157
At f₀≠ f_TIs determined, or f is determined in # 1159.₀≠
f_WIf it is determined that the timer is turned off in # 1160.
Let it start. In # 1161 and # 1162, the timer
High voltage V for lens until time is up_LEH
Power supply starts (P₃₉= “High”). # 1162
If the timer expires, move to # 1178
I do. Before the timer times out, # 1161
High voltage V for lens_LEHIs supplied, the flag LS
F, MFL, WIF are reset to 0 and locked
Shadow magnification β _LTo clear the wide mode warning
(# 1163 to # 1167). And now in # 1179
Current focal length f₀Register f₀’Escape to
In # 1168, it is determined whether the teleswitch is ON. Te
If the switch is ON, the zoom motor MO₃The tele end
Focal length f_TDrive toward and the tele switch is ON
Zoom motor MO if not₃The focal length f at the wide end_W
Drive toward (# 1169, # 1173). Telephony
When you start zooming (# 1169)
When the switch is ON, the current focal length f₀Is the tele end
Point distance f_TDoes not reach the limit, and the high voltage V for the lens_LEHIs powered
Has been (P₃₉= “High”)
Loop of # 1170 to # 1172 as long as it is satisfied
And one of the above three conditions is not met.
Then, in # 1177, zoom motor MO₃Stop and #
Current focal length f at 1178₀Is displayed and
It Similarly, zooming in the wide direction (# 1173)
When started, the wide switch is ON and the current focus
Point distance f₀Is the focal length f at the wide end_WHas not reached
High voltage V_LEHIs being supplied (P₃₉= "Hig
As long as the three conditions "h") are satisfied, # 11
It loops through the loop of 74 to # 1176,
If one of them is not satisfied, use # 1177 to zoom.
Data MO₃And stop the current focal length f at # 1178.
₀Is displayed and the process returns.

Returning to the flow of FIG. 63, when there is data input from the body in # 1117, the mode buffer MOB is read and waits until the port P ₃₄ becomes "High" level (# 1123, # 1124). . And
It is determined whether or not it is EXZM (zoom between exposures) (# 112).
5). If it is not EXZM, it is determined whether it is PZOOM (power zoom) (# 1126). # 1125 to E
If it is determined to be XZM or if it is determined not to be the power zoom in # 1126, the display of the lens mode LMO ₁ is erased in # 1128, and the process proceeds to # 1129. If it is determined in # 1125 and # 1126 that the power zoom is not EXZM, the lens mode LMO ₁ is displayed in # 1127, and the process proceeds to # 1129.

In step 1129, it is determined whether or not it is PZOOM (power zoom). # 1 if not power zoom
130, # 1131 MLM (shooting magnification lock mode)
Alternatively, it is determined whether it is WIM (wide mode). In the case of MLM or WIM, the lens switch LES becomes a switch for magnification lock or wide zoom and its cancellation, and the display of the lens switch mode LMO ₂ becomes meaningless.
The display is erased (# 1132). # 1130, # 1
In 131, it is judged that it is neither MIM nor WIM, or # 1
When it is determined in 129 that the power zoom is selected, the lens switch mode LMO ₂ is displayed (# 113).
3). The process proceeds from # 1132 or # 1133 to # 1134, and the current focal length f ₀ is displayed. Then, if the system is reset, it is displayed that the lens position is ∞, and the process proceeds to the stop routine (# 1135, # 1136). If the power switch PWS is off, it is desirable to erase these displays as well.

On the other hand, the body is in operation at # 1116 (IC
If PB ₅₄ ≠ 00, system reset (ICPB ₅₄
= 11) is determined (# 1121). If the body is not the system reset, the process shifts to the AF routine, and if the system is reset, waits for the data input from the body or until the port P ₃₄ becomes the "High" level (# 1122, # 1141). . If there is data input from the body, it is an operation by the system reset key,
The procedure moves to # 1123. On the other hand, port P ₃₄ is "High."
At the h "level, it means that the lens is mounted when the power switch PWS is OFF, and after allowing INT ₁ interrupt, the lens is moved to the focal length f _S where the total length becomes the shortest ( # 1142 to # 1148) Specifically, it is determined whether or not the current focal length f ₀ is the shortest focal length f _S, and if f ₀ = f _S , the process proceeds to # 1134. If f ₀ ≠ f _S , then # 114
4 and feed the high voltage V _LEH for the lens (P ₃₉ = ”
High ”), and when the lens high voltage V _LEH is supplied, the current focal length f ₀ is saved in the register f ₀ ′ and the zoom motor MO ₃ is driven toward the focal length f _S. (# 1145, # 1146) When the current focal length f ₀ reaches the shortest focal length f _S , the zoom motor MO ₃ is stopped and # 113.
The process moves to 4 (# 1147, # 1148).

If the body is not system reset (ICPB ₅₄ = 11) in # 1121, the process proceeds to the AF routine shown in FIG. 67, and AF is in progress in # 1181 (ICPB ₀ =
It is determined whether or not 1). If in AF, # 1182
# Have data input from the body in 1183, but or port P ₃₄ waits to become "High" level. # 11
If port P ₃₄ goes to "High" level at 83, PZ
It is determined whether it is OOM (power zoom) and AZP (auto zoom program) (# 1184, # 1185).
It is determined in # 1184 that the power zoom is not performed, or # 1
When it is determined in 185 that it is not AZP, # 118
At 8, the interrupt is enabled and the process proceeds to the stop routine. # 1
When it is determined in 184 and # 1185 that the power zoom is in effect and AZP is selected, the interrupt at the interrupt terminal INT ₁ is enabled in # 1186, and the process proceeds to the AZP routine.

On the other hand, in # 1182, data input from the body is input.
If you have the power, enter the shooting distance D and enter the port P₃₄Is "Hi
Wait until the gh "level is reached (# 1191, # 119
2). Then, determine whether it is PZOOM (power zoom).
(# 1193). For power zoom, AZP
₁~ AZP₃It is determined whether or not (# 1194). AZP
₁~ AZP₃81, the first
Auto zoom program (AZP₁), As shown in FIG.
2 auto zoom program (AZP₂), Or FIG.
3rd auto zoom program (AZP₃) Each
The calculation is performed, and from the shooting distance D to the shooting magnification β, the focal length
f_A, Offset amount N_LIs calculated (# 1195). #
AZP in 1194₁~ AZP₃If not, MLM (shooting
It is determined whether or not the shadow magnification lock mode is set (# 119).
7). If MLM, the lens switch flag LSF is 1
It is determined whether or not (# 1198). # 1197 MLM
Or, even if it's an MLM, the lens switch with # 1198
Tiflag LSF is not 1, or power is set at # 1193
When it is not zoomed, interrupt is enabled in # 1194 and stopped.
Shift to stop routine. ML in # 1197 and # 1198
M (shooting magnification lock mode) and lens switch flag
When it is determined that the GLSF is 1, MLF = 1
(Lock ratio β_LIs stored) is determined (# 11
99). Lock factor β when MLF ≠ 1_LIf the memory of
For example, the shooting distance D and the current focal length f₀To lock ratio β
_LIs calculated and stored, and the lock ratio β_LIs displayed, and MLF = 1
(# 1201 to # 1203). Also, # 1199
If MLF = 1, lock magnification β_LAnd shooting distance D
To focal length f_AAnd offset amount N_LIs calculated (# 12
00).

Next, if AF is not being performed in # 1181,
68, the process proceeds to # 1211, and WIM (wide mode
Do) or not. # 1211 WIM
Switch to the routine and interrupt terminal INT₁Can be interrupted by
And determine whether or not it is PZOOM (power zoom)
(# 1212, # 1213). Unless power zoom
Moving to # 1225, if it is power zoom, lens switch
The switch flag LSF is 1 (# 12
14). If LSF = 1, the wide flag WIF is 1.
It is determined whether there is any (# 1215). WIF = 1
If so, the current focal length f₀Is the focal length f at the wide end_W
Is determined (# 1216). f ₀= F_Wso
If so, move to # 1225, f₀≠ f_WThen wide
Zoom to the end. First, switch the timer on # 1217.
Start it and start the timer at # 1218 and # 1219.
High voltage for lens V_LEHPower supply
(P₃₉= “High”). # 1219 timer
When the time is up, the process proceeds to # 1225. # 1
High voltage V for lens at 218_LEHPower supply (P₃₉= "Hig
h ") is determined, the current focal length f₀Register
f₀’, Zoom motor MO₃The wide end of
Focal length f_WDrive toward (# 1220, # 122
1). And f₀= F_WOr high electric power for lens
Pressure V_LEHPower supply is stopped (P₃₉= ”Low”)
Cycle through the # 1222 and # 1223 loops to the wide end
Continue zooming. High voltage V for lens with # 1223
_LEHPower supply is stopped (P₃₉= “Low”), zoom
The motor MO3 is stopped (# 1224). And
Reset switch flag LSF and wide flag WIF
(# 1225, # 1226). In addition, the current
Focal length f₀Is displayed, the interrupt is enabled and the stop routine is entered.
The process is transferred (# 1246, # 1247).

On the other hand, if f ₀ = f _W is determined in # 1222, it means that the wide end has been reached. Therefore, the zoom motor MO ₃ is stopped, the wide flag WIF is set to 1, and a wide mode warning is issued. Move to # 1246 (# 122
7- # 1229). Wide mode warnings are issued while at the wide end.

On the other hand, if LSF = 1 in # 1214, it is determined whether the wide flag WIF is 0 (# 12).
30). If WIF = 0, the process proceeds to # 1246 without doing anything. If the wide flag WIF is not 0 in # 1230, the original focal length (stored as f _M ) is restored. First, the power supply of the high voltage V _LEH for the lens (P ₃₉ = “H
wait "), the focal length saved in the register f ₀ 'is stored as the original focal length f _M , and the current focal length f ₀ is saved in the register f ₀ ' and the zoom motor M
The O ₃ is driven toward the original focal length f _M (# 123
1 to # 1233). Then, the current focal length f ₀ returns to the original focal length f _M , or the lens high voltage V _LEH
# 123 until the power supply to the device stops (P ₃₉ = “Low”)
It goes around the loop of # 4, # 1235. When it is determined in # 1235 that the power supply to the lens high voltage V _LEH is stopped (P ₃₉ = “Low”), the zoom motor MO ₃ is stopped in # 1236 and the _{process proceeds} to # 1225. Also, in # 1234, f ₀ =
When it is determined that f _M is reached, the zoom motor MO ₃
Stop, reset the wide flag WIF to 0, cancel the wide mode warning, and proceed to # 1246 (#
1237- # 1239).

Next, if it is not WIM in # 1211, the routine goes to the D input routine shown in FIG. In this routine, first, an EXZM (zoom between exposures) subroutine (S
UB40) is executed. Then, the loop of # 1241 and # 1242 is cycled until data is input from the body or the port P ₃₄ becomes the “High” level.
If there is data input from the body in # 1241, and inputs the data of the object distance D, the port P ₃₄ is waiting for the "High" level, display the photographing distance D, # 124
The process shifts to 6 (# 1243 to # 1245). In addition, the port P is used at # 1242 when there is no data input from the body.
_{If 34} becomes "High" level, # 1246 as it is.
Move to

Next, an EXZM (zoom between exposures) subroutine will be described with reference to FIGS. 72 and 73. In this subroutine, it is first determined whether or not the exposure is in progress (# 126
1). If it is during exposure, it is determined whether or not it is PZOOM (power zoom) (# 1262). If it is not exposed in # 1261 or if it is not power zoom in # 1262,
The interrupt is enabled, the current focal length f ₀ is displayed, and the process proceeds to the stop routine (# 1263, # 1264). # 12
If it is determined that the exposure is being performed at 61 and the power zoom is determined at # 1262, it is determined whether the current focal length f ₀ is the focal length f _W at the wide end (# 126).
5). If f ₀ = f _W , the process proceeds to # 1278 and f ₀ ≠
If f _W , power supply of high voltage V _LEH for lens (P ₃₉ = “H
wait ") to move the zoom motor MO ₃ to the focal length f _W at the wide end (# 1266, # 126).
7). Then, it is determined whether the current focal length f ₀ reaches the focal length f _W at the wide end, the power supply stoppage of the lens high voltage V _LEH (P ₃₉ = “Low”), or the bidirectional signal line from the body. The loop of # 1268, # 1269, and # 1270 is cycled until the lens select signal CSL input to the port P ₃₄ via the LBL becomes the “Low” level. If f ₀ = f _W in # 1268, it means that the wide end has been reached. Therefore, the zoom motor MO ₃ is stopped in # 1277 and the process proceeds to # 1278. Further, at # 1269, the power supply to the lens high voltage V _LEH is stopped (P
₃₉ = “Low”), the zoom motor MO ₃ is stopped, the current focal length f ₀ is displayed, the interrupt is enabled, and the operation ends (# 1274-1276). on the other hand,#
At 1270, the lens select signal CSL from the body is "
If the Low level (P ₃₄ = “Low”) is reached, the status communication is requested by the body. Therefore, the least significant bit of the lens status is set to b ₀ = 1 (during zooming), and the lens status ICPL is set. and outputs the (# 1271, # 1272). Then, waiting to return to port P ₃₄ or "High" level in # 1273, # 1
The loop of 268 to # 1270 is cycled again.

When f ₀ = f _W in # 1265 or # 1268 and the process proceeds to # 1278, the lens select signal CSL input to the port P ₃₄ from the body via the bidirectional signal line LBL becomes “Low” level. Wait for
If port P ₃₄ goes to "Low" level in # 1278,
Since the status communication is requested by the body, the least significant bit of the lens status ICPL is set to b ₀ = 0 (zoom stopped), and the lens status IC is set.
PL is output (# 1279, # 1280). And
Waiting for the port P ₃₄ to return to the "High" level at # 1281, exposure to the film is started, and power supply of the lens high voltage V _LEH is temporarily stopped at # 1282 (P ₃₉ = "
Low ”), power is supplied again at # 1283 (P ₃₉ =“ High ”)
h ”), then use # 1284 to zoom motor M
O ₃ is zoomed toward the focal length f _T at the telephoto end. The current focal length f ₀ reaches the focal length f _T at the tele end, or the power supply to the lens high voltage V _LEH is stopped (P ₃₉ = ”
Low ") is determined, # 1285, # 128
It goes through the loop of 6. If it is determined that f ₀ = f _T in # 1285, or if power supply to the lens high voltage V _LEH is stopped (P ₃₉ = “Low”) in # 1286, the zoom motor M
O ₃ is stopped, interruption is allowed, the current focal length f ₀ is displayed, and the routine proceeds to the stop routine (# 1287 to # 12).
89).

In the case of a varifocal zoom lens, since the shooting distance changes due to zooming, EXZM
(Zoom between exposures) is prohibited, but it is not considered to be a big problem if the core image is in focus. By further zooming, the image becomes out of focus and a special effect is produced. There is also the advantage of being able to aim. Therefore, in this case, the program is changed as follows. That is, regardless of whether the zoom lens is a varifocal zoom lens or not, the offset routine (SUB13) is first performed.
In the case of EXZM (zoom between exposures), the lens is zoomed to the wide end before executing, and then AE calculation and AF are performed to focus the image that is the core at the wide end. Then, in the exposure control routines shown in FIGS. 37 and 38, # 534 to # 548 (zoom to the wide end) are omitted, and in # 558, it is determined whether or not the lens is a type I lens. The process proceeds to # 566, otherwise to # 559, and the same operation is performed thereafter.
Also on the lens side, # 1265- # 1282 (zoom to the wide end) in the EXZM routine shown in FIGS. 72 and 73 is omitted, and EXZM (zoom between exposures) during exposure.
If so, the operation from # 1283 is performed. Also,
In the embodiment, when EXZM (zoom between exposures) is performed with the type III lens, the display of EXZM is erased (see # 1125, # 1128 in FIG. 64 and # 1312, # 1315 in FIG. 74). This operation is also unnecessary.

Next, the data is sent from the lens to the body.
74 and 75 show the lens data output routine for
explain. In this routine, the data pointer DPO
The operation is divided according to the content. First, the data pointer D
Enter PO and DPO = 16 _HIt is determined whether or not (# 1
301, # 1302). DPO = 16_HThen, the first
Send 6 bytes of lens data from dress AD1
Is that it is instructed by the body
, Open aperture value Avo and contents of mode buffer MOB
The minimum aperture value Avmax, aperture value deviation value ΔAv,
Conversion factor K_LAnd NDC, current focal length f₀Output
(# 1303 to # 1308). And port P34
The lens select signal CSL input to is "High"
Wait for the player to return to the level and finish the communication (# 130
9). Next, whether or not the power switch PWS is ON
Is determined (# 1310). Power switch PWS is O
If it is not N, the display is erased and the current focal length f₀The table
Shows that interrupts are enabled and shifts to the stop routine (# 13
11, # 1319, # 1320). Power with # 1310
If switch PWS is ON, EXZM (zoom during exposure)
Or not) (# 1312). Be EXZM
For example, lens mode LMO₁Is erased (# 131
5). If it is not EXZM, PZOOM (Power Zoo
Or not) (# 1313). With power zoom
If not, lens mode LMO₁Is erased (# 13
15), for power zoom, lens mode LMO₁of
Display is performed (# 1314). And the lens switch model
LMO₂Subroutine for displaying (SUB4
Execute 1). Next, check whether the body is inactive
The determination is made (# 1316). If the body is working, take a picture
The shadow distance D is displayed and the process proceeds to # 1319 (# 131
8). If the body is inactive in # 1316, # 131
In step 7, a message indicating that the lens is in the ∞ position is displayed.
After executing the zoom subroutine (SUB39),
Moving to 1319.

In # 1302, the data pointer is DPO = 1.
If it is not 6 _H , it is determined at # 1325 whether DPO = 81 _H. If DPO = 81 _H , the body has instructed that one byte of lens data (that is, the offset amount N _L ) should be input from the eighth address AD8, so the position of the focusing lens is corrected. The data of the offset amount N _L for performing the calculation is calculated from the current focal length f ₀ , the focal length saved in the register f ₀ ′, and the shooting distance D based on the formula described later, and this data is sent to the body. (# 1326, # 1327). Then, the lens select signal CSL input to the port P ₃₄
Waits for the camera to return to the "High" level, the shooting distance D is displayed, and the process proceeds to # 1319 (# 1328, # 1.
329).

In # 1325, the data pointer is DPO = 8.
If it is not 1 _H , it is determined at # 1331 whether DPO = 54 _H. If DPO = 54 _H , the body has instructed that 4 bytes of lens data should be input from the fifth address AD5, so AZP
Conversion coefficient N based on the calculation of (Aud zoom program)
DC (f _A ), focal length f _A , shooting magnification β, and offset amount N _L are output (# 1312 to # 1336). Then, the lens select signal C input to the port P ₃₄
After waiting for SL to return to the "High" level, the interrupt to the interrupt terminal INT ₁ is enabled, and the process proceeds to the AZP routine.

In the AZP routine, zooming is performed on the calculated focal length f _A. First, it is determined whether or not the current focal length f ₀ matches the calculated focal length f _A (# 1339). If f ₀ = f _A , the shooting distance D is displayed in # 1346 and the process proceeds to # 1319. # 1339
If f ₀ ≠ f _A , the zoom motor MO ₃ is awaited after the lens high voltage V _LEH is supplied (P ₃₉ = “High”).
Is driven toward the calculated focal length f _A (# 134
1). Then, until the current focal length f ₀ reaches the calculated focal length f _A , or until it is determined that the lens high voltage V _LEH has stopped being fed (P ₃₉ = “Low”), # 134.
It cycles through the loop of # 2, # 1343. When it is determined in # 1343 that the power supply to the lens high voltage V _LEH is stopped, the zoom motor M is driven in # 1344 to drive the AF motor MO _2.
Stop O ₃ and return to # 1340 to set the high voltage V for the lens.
Wait for _LEH to re-power. If f ₀ = f _A in # 1342, the zoom motor MO ₃ is stopped in # 1345, and # 1
The shooting distance D is displayed at 346, and the process proceeds to # 1319.

The data point is DPO = 5 in # 1331.
If it is not 4 _H , it is determined at # 1351 whether DPO = 13 _H. If DPO = 13 _H , it means that lens data of 3 bytes should be transmitted from the first address AD1 to the body. Therefore, the maximum aperture value Avo, the minimum aperture value Avmax, and the aperture value deviation amount. △ A
Send v to the body (# 1352- # 1354). Then, wait for the port P ₃₄ lens select signal CSL from the body is input becomes "High" level, the process proceeds to stop routine interrupts the variable (# 1355, #
1356). If DPO is not 13 _H in # 1351, the interrupt is accepted in # 1356 and the process proceeds to the stop routine.

In the above description, the power source on the lens side (particularly the power source for the zoom motor MO ₃ ) is supplied from the power source battery EB of the body, but it is conceivable to provide a power source battery on the lens side as well. . In this case, the AF motor MO ₂ and the zoom motor MO ₃ can be simultaneously moved regardless of the state of the battery check. Therefore, it is necessary to alternately move the motors MO ₂ and MO ₃ in the AZP routine (# 1340, # 1341, # 1343, #
1344), AZP (auto zoom program) can be performed at high speed. Further, during the power zoom, it is not necessary to start the body from the lens and receive the power supply from the body to perform zooming. Even in this case, when it is detected that AF is in progress (during focus detection operation or focus adjustment operation), it is desirable to prohibit the power zoom in order to maintain AF accuracy.

Next, a subroutine for displaying the lens switch mode LMO ₂ will be described with reference to FIG. #
In 1361, whether or not the WIM (wide mode) is set is # 13.
At 62, it is determined whether or not it is the MLM (shooting magnification lock mode). If it is WIM or MLM, # 1364
The display of the lens switch mode LMO ₂ is erased with and the process returns. # 1363 if neither WIM nor MLM
Display the lens switch mode LMO ₂ with and return.

This is the end of the description of the flow chart showing the operation of the in-lens microcomputer CPUL, and then the description of the flow chart showing the operation of the in-flash microcomputer CPUF. 77 and 78 show the microcomputer CP in the flash.
It is a flow chart which shows operation of UF. When the flash main switch FMS changes from ON to OFF or from OFF to ON, the pulse generator PG ₃ interrupts the interrupt terminal I.
77. A "Low" level pulse is input to NTα, and FIG.
The interrupt routine after # 1501 is executed. In this interrupt routine, first, it is determined that the interrupt is possible and whether or not the flash main switch FMS is ON (# 1501,
# 1502). Flash main switch FMS or ON
If so, the flash enable signal FLEN is set to the “Low” level to enable the light emission, and the booster circuit DDF in the flash is operated until the charging is completed (# 1503 to # 1503).
1506). Flash main switch F with # 1502
If MS is OFF, flashing is not possible (FLEN = "High"
h ″), the boosting is stopped, the display is turned off, and the operation is stopped (# 1510 to # 1512).

On the other hand, when the flash select signal CSF sent from the body goes to "Low" level, the interrupt routine by the interrupt terminal INTβ (after # 1515 in FIG. 77) is executed. In this interrupt routine, it is first determined whether or not the flash main switch FMS is ON (#
515). If the flash main switch FMS is not ON, the interrupt is permitted in # 1509 and the process proceeds to # 1510. If the flash main switch FMS is ON, it is determined whether the body is in the flash data input mode (# 1516). Specifically, if the flash select signal CSF is at the "High" level at this point, it is determined that the body is in the flash data input mode, and the flash data FLD is determined in # 1517 to # 1531.
To the body. Flash data FLD is 3 bits b
It is the status data of ₂ , b ₁ and b ₀ , and the i-th (i = 0 to 2) data is hereinafter referred to as FLDi. First, in # 1517, it is determined whether charging is completed. If the charging is completed, the charging completion is displayed, and the flash data FLD is data 0 indicating that the charging is completed by the dedicated flash.
1 * is set (# 1518, # 1519). here,
FLD ₂ = 0 indicates a dedicated flash, and FL
D ₁ = 1 indicates the completion of charging. If the charging is not completed in # 1517, the display indicating that the charging is completed is erased, and the flash data FLD is set to the data 00 * indicating that the charging is not completed in the dedicated flash (# 1520, # 1521). Here, FLD ₁ = 0 indicates that charging has not been completed. Next, # 152
At 5, the signal FDC is set. Signal FDC is "Low"
If it is a level, dimming OK is displayed, and data 0 * 0 indicating dimming OK is set in the flash data FLD by the dedicated flash (# 1526, # 1527). Here, FLD ₀ = 0 indicates that dimming is OK. Also,
If the signal FLD is not at "Low" level in # 1525, the display of dimming OK is erased, and the flash data FLD
Is set to data 0 * 1 indicating that the dimming is not OK with the dedicated flash (# 1528, # 1529). Here, FLD ₀ = 1 indicates that dimming is not OK. The flash data FLD set as above is # 153.
In 1, it is sent to the body as flash status data. Further, in # 1532, the light emission amount data Ivz based on the irradiation range is sent to the body, and the process proceeds to # 1551.

On the other hand, if the flash select signal CSF is at "Low" level in # 1516, it is determined that the body is not in the flash data input mode but in the body data output mode, and the aperture value Av and the film sensitivity Sv are detected from the body. , The shooting distance Dv and the focal length f are input to the flash (# 1541 to # 1544). Then, after waiting for the flash select signal CSF to reach the "High" level, the flash irradiation range is changed to the focal length f.
Depending on the motor MO ₅ and the code plate ZPC (#
1545, # 1546). Furthermore, the irradiation range is displayed,
Aperture value Av, film sensitivity Sv, and light emission amount data Ivz
Then, the distance range in which the proper exposure is obtained is calculated and displayed, and the shooting distance D is displayed (# 1547 to # 1549). afterwards,
The procedure moves to # 1551.

At # 1551, the timer is reset and started. Next, the flash timer register TI
A predetermined value P is set in FR to enable interruption (# 155
2, # 1553). Then, the voltage is raised until the charging is completed, and after the charging is completed, the charging completion display is performed (# 1554-
# 1562). If there is an interrupt by the interrupt terminal INTβ during this period, the above operation is performed again.

Lens select signal CSF from body
When becomes "Low" level, a timer interrupt occurs.
This interrupt routine will be described with reference to FIG. 79. Signal FDC
If "Low" level, dimming OK is displayed and "High"
If it is at h "level, the display of dimming OK is erased (# 1570).
~ # 1572). Then, the contents of the flash timer register TIFR are decremented by 1 and the TIFR
It is determined whether or not = 0 (# 1573, # 1574). T
If IFR ≠ 0, the timer is reset / started again to enable an interrupt and boost operation (# 1554 to # 155).
Return to the routine of 6) (# 1578, # 157).
9). A predetermined time (for example, 3 after communication with the body is completed)
Seconds), TIFR = 0 in # 1574,
The boosting is stopped, the display is turned off, the interrupt is enabled, and the operation is finished (# 1575 to # 1577).

FIG. 80 shows the microcomputer CPUL in the lens and the body.
Modified example of the signal transmission terminal between the internal microcomputer CPUB
Show. In this example, the lens select signal CSL is "Lo
At the w "level, the in-lens microcomputer CPUL is activated
Is done. Also, the buffer BF ₄₀And BF₅₀Is activated
Read / write signal R / W is in-lens microcomputer CP
Sent to UL. Read / write signal R / W is "Lo"
At the w "level, the buffer BF₄₁And BF₅₁Is activated
Then, from the microcomputer CPUB in the body,
Data is sent to the CPUL. Read / write signal R
When / W becomes "High" level, the buffer BF₅₂When
BF₄₂Is activated, and the microcomputer CPUL in the lens
Data is sent to the microcomputer CPUB in the body. lens
When the select signal CSL becomes "High" level,
FFFA BF₄₀And BF₅₀Is in a high output impedance state
Buffer BF₄₃And BF₅₃Is activated. Accordingly
And port P₈₁Becomes "Low" level, the buffer
BF₅₃, Terminal J₉₁, J₈₁, Buffer BF₄₃, And game
To AN₁Through the interrupt terminal INT_AAn interrupt signal is input to
Then, the in-body microcomputer CPUB is activated. This method
However, the number of terminals between the lens and the body is the one shown in Figs.
It is similar to the formula. All buffers shown in the drawing
Is a tri-state buffer.

81 to 83 show the first to third auto modes.
Zoom program AZP₁~ AZP ₃Program
It shows that. In the figure, the vertical axis is the focal length f (mm) and the horizontal
The axis indicates the shooting distance D (m). f_TIs the focal length at the tele end
Away, f_WIs the focal length at the wide end. D_TIs the tele end
Shooting distance, D_WIs the shooting distance at the wide end. β_TIs
Shooting magnification at the edge, β_WIs the shooting magnification at the wide end. Since
Each program line will be described below.

First, the first automatic zoom program AZ
The program line of P ₁ , as shown in FIG.
When D _W , f _A = f _W , and when D ≧ D _T , f _A =
f _T , and when D _W <D <D _T , the point (D _W ,
It is a straight line passing through f _W ) and the point (D _T , f _T ). That is,
In this program line, points (D _W , f _W ) and points (D _T , f _T ) are connected by a straight line with a constant gradient, and the shooting magnification β _T at the shooting distance D _T at the tele end is the shooting at the wide end. It is smaller than the photographing magnification β _{W at the} distance D _W. The descriptive feature is that the person and the background are shown in an appropriate size. However, when the shooting distance D is long, the image is slightly small, and when the shooting distance D is close, the image is slightly large and the size is appropriate.

Next, the second automatic zoom program AZ
As shown by the bold line in FIG. 82, the program line of P ₂ is f _A = f _W when D ≦ D ₁ , f _A = f _T when D ≧ D ₄ , and when D ₁ <D ≦ D ₂ Point (D
₁ , f _W ) and a line passing through the point (D ₂ , f ₂ ), D ₂ <D ≦
When D ₃ , f _A = D × β ₂₃ (β ₁ > β ₂₃ > β ₄ ),
Then, when D ₃ <D ≦ D ₄ , it becomes a straight line passing through the point (D ₃ , f ₃ ) and the point (D ₄ , f _T ). In this program line, the photographing magnification β is large as a whole as compared with the first program line (shown by a thin line), and it is convex above the first program line. The descriptive feature is that the person appears in an appropriate size and the person (or main subject) is emphasized by blurring the background.

Finally, the third automatic zoom program A
ZP₃The program line of is as shown by the thick line in FIG.
And D ≦ D₁When f_A= F_W, D ≧ D_FourWhen
Is f _A= F_TAnd D₁<D ≦ D₂When, the point (D
₁, F_W) And point (D₂, F₂) Straight line, D₂<D ≦
D₃When f_A= D × β_{twenty three}(Β₁> Β_{twenty three}> Β_Four),
And D₃<D ≦ D_FourWhen, the point (D₃, F₃) And dots
(D_Four, F_T) Will be a straight line. This program
In comparison with the first program line (shown by the thin line)
As a result, the overall shooting magnification β is small and the first program
It becomes convex below the morain. And the special feature in the description
The point is that you can take a snapshot with a sense of depth as much as possible.
is there.

84 and 85 are views for explaining a method of calculating the offset amount N _L for driving the focusing lens in the offset routine (SUB13) in the case of the varifocal lens. In the figure, I to IV indicate lenses of the first to fourth groups. The horizontal direction indicates the optical axis direction of the lens, and the vertical direction indicates the change in focal length due to zooming. The upper horizontal line shows the arrangement of each lens at the wide end, and the lower horizontal line shows the arrangement of each lens at the tele end. At any zoom position between the wide end and the tele end, the respective lenses move in an interlocking manner so that the respective lenses are arranged on the intersection of the locus shown by the curve and the horizontal line. The focusing lens is the lens IV of the fourth group, and the offset amount N _L is determined so that it falls within the range indicated by the diagonal lines.

Generally, the shooting distance is D, the lens extension amount from the ∞ position to the photography distance D is d, the change of the extension amount d is Δd, the defocus amount is ΔL, Δd / ΔL = K ₀
Then, d≈f ² · K ₀ / D. Further, the rotation number of the AF coupler from the ∞ position to the shooting distance D is N _L , and the change amount of the rotation number is ΔN _L , ΔN _L /
When ΔL = K _L , N _L ≈f ² · K _L / D. Now, when the focal length is f = f ₁ , the shooting distance D
= D ₁ is in focus, and K _L = K _L1 and N _L = N _L1 . When zooming from this state to a state where the focal length is f = f ₂ , the shooting distance is D = D ₂ , K _L = K _L2 , and N _L = N _L2 , the focus lens is within the range where focus detection is possible. In the lens shown in FIG. 85, the offset amount N _L for moving the lens is N _L = f ₂ ² · K _L2 / D−f ₁ ² · K _L1 / D = f ₂ ² · K _L2 / D−N _L1 It becomes ... Further, in the lens shown in FIG. 84, N _L = f ₂ ² · K _L2 / D−N _L1 + {Nz (f ₂ ) −Nz
(F ₁ )} ... Here, Nz (f) is the amount of lens movement required when the ∞ position changes due to zooming,
Depending on the optical design, it will be various functions. In the above equation, the conversion coefficient K _L has a one-to-one correspondence with the focal length f, but since the correspondence is different for each lens, it is stored as a table in the memory inside the lens. It should be noted that, as in the lens shown in FIG. 85, in the case of a zoom lens for focusing in the rear group, in which the ∞ position does not move, the conversion coefficient K _L does not change due to zooming, as in the case of the entire extension zoom, so the expression is N _L = ( f _{² 2} -f _{1 2)} · may be the K _L / D.

Although the description of the embodiments has been completed, the present invention can be embodied in many forms without departing from the essential characteristics thereof. Therefore, the embodiments described above are mainly described. Things are not restrictive. Further, the technical scope of the present invention covers all modifications within the requirements of the claims or equivalents to the requirements.

For example, in the above-mentioned embodiment, the case of the interchangeable lens type camera is exemplified, but the inter-exposure zoom can also be applied to a camera in which a zoom lens is fixedly mounted. Further, although the setting of the zoom between exposures is shown by mounting the IC card, it may be set by the mode button on the camera side or the lens side. Although the example of the focal play is shown as the shutter, a lens shutter which is also used as an aperture may be used. In this case, since the entire surface of the film is exposed after the shutter is opened, in the case of natural light, the limited exposure time can be shortened by performing zooming a predetermined time after the shutter is opened, compared to the focal plane shutter. You can In flash photography, the flash may be fired at the aperture opening determined by the flashmatic calculation, and then zooming may be performed.

In the embodiment, the wide end is first set and the zooming is performed toward the tele end. However, the tele end is set first for another effect. Alternatively, it may be moved to the wide end during exposure, or both may be switched. Even when the telephoto end is set first and the wide end is exposed for a long time, a photograph having the same effect as that of the embodiment can be obtained. Further, the zooming speed may be obtained from the exposure time and the zoom range, and the zooming may be controlled at this speed. The zoom range is determined as the entire zoom range of the zoom lens or the range set by the photographer.

[0200]

According to the present invention, only the power source for the in-lens control means is supplied when the in-body control means provided in the camera body is in a stopped state, and when the lens is operated, the body control means is operated. Since the power for the lens driving means is supplied together with starting the lens driving power, the lens driving power with high power consumption is supplied only when necessary, so that the battery is not wasted and can be effectively used. Also,
The operation is simple and the usability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is a perspective view of a camera body to which the present invention is applied.

FIG. 3 is a perspective view of an interchangeable lens to which the present invention is applied.

FIG. 4 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 5 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 6 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 7 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 8 is a circuit diagram of an interchangeable lens to which the present invention is applied.

FIG. 9 is a circuit diagram of a flash to which the present invention is applied.

FIG. 10 is a flowchart for explaining the operation of the present invention.

FIG. 11 is a flowchart for explaining the operation of the present invention.

FIG. 12 is a flowchart for explaining the operation of the present invention.

FIG. 13 is a flowchart for explaining the operation of the present invention.

FIG. 14 is a flowchart for explaining the operation of the present invention.

FIG. 15 is a flowchart for explaining the operation of the present invention.

FIG. 16 is a flowchart for explaining the operation of the present invention.

FIG. 17 is a flowchart for explaining the operation of the present invention.

FIG. 18 is a flowchart for explaining the operation of the present invention.

FIG. 19 is a flowchart for explaining the operation of the present invention.

FIG. 20 is a flowchart for explaining the operation of the present invention.

FIG. 21 is a flowchart for explaining the operation of the present invention.

FIG. 22 is a flow chart for explaining the operation of the present invention.

FIG. 23 is a flowchart for explaining the operation of the present invention.

FIG. 24 is a flowchart for explaining the operation of the present invention.

FIG. 25 is a flow chart for explaining the operation of the present invention.

FIG. 26 is a flow chart for explaining the operation of the present invention.

FIG. 27 is a flowchart for explaining the operation of the present invention.

FIG. 28 is a flow chart for explaining the operation of the present invention.

FIG. 29 is a flowchart for explaining the operation of the present invention.

FIG. 30 is a flowchart for explaining the operation of the present invention.

FIG. 31 is a flowchart for explaining the operation of the present invention.

FIG. 32 is a flowchart for explaining the operation of the present invention.

FIG. 33 is a flowchart for explaining the operation of the present invention.

FIG. 34 is a flowchart for explaining the operation of the present invention.

FIG. 35 is a flow chart for explaining the operation of the present invention.

FIG. 36 is a flow chart for explaining the operation of the present invention.

FIG. 37 is a flowchart for explaining the operation of the present invention.

FIG. 38 is a flow chart for explaining the operation of the present invention.

FIG. 39 is a flowchart for explaining the operation of the present invention.

FIG. 40 is a flow chart for explaining the operation of the present invention.

FIG. 41 is a flowchart for explaining the operation of the present invention.

FIG. 42 is a flow chart for explaining the operation of the present invention.

FIG. 43 is a flowchart for explaining the operation of the present invention.

FIG. 44 is a flowchart for explaining the operation of the present invention.

FIG. 45 is a flowchart for explaining the operation of the present invention.

FIG. 46 is a flowchart for explaining the operation of the present invention.

FIG. 47 is a flowchart for explaining the operation of the present invention.

FIG. 48 is a flowchart for explaining the operation of the present invention.

FIG. 49 is a flow chart for explaining the operation of the present invention.

FIG. 50 is a flowchart for explaining the operation of the present invention.

FIG. 51 is a flowchart for explaining the operation of the present invention.

FIG. 52 is a flow chart for explaining the operation of the present invention.

FIG. 53 is a flow chart for explaining the operation of the present invention.

FIG. 54 is a flowchart for explaining the operation of the present invention.

FIG. 55 is a flowchart for explaining the operation of the present invention.

FIG. 56 is a flowchart for explaining the operation of the present invention.

FIG. 57 is a flowchart for explaining the operation of the present invention.

FIG. 58 is a flowchart for explaining the operation of the present invention.

FIG. 59 is a flow chart for explaining the operation of the present invention.

FIG. 60 is a flowchart for explaining the operation of the present invention.

FIG. 61 is a flowchart for explaining the operation of the present invention.

FIG. 62 is a flowchart for explaining the operation of the present invention.

FIG. 63 is a flowchart for explaining the operation of the present invention.

FIG. 64 is a flowchart for explaining the operation of the present invention.

FIG. 65 is a flowchart for explaining the operation of the present invention.

FIG. 66 is a flowchart for explaining the operation of the present invention.

FIG. 67 is a flow chart for explaining the operation of the present invention.

FIG. 68 is a flowchart for explaining the operation of the present invention.

FIG. 69 is a flow chart for explaining the operation of the present invention.

FIG. 70 is a flow chart for explaining the operation of the present invention.

71 is a flowchart for explaining the operation of the present invention. FIG.

FIG. 72 is a flowchart for explaining the operation of the present invention.

FIG. 73 is a flowchart for explaining the operation of the present invention.

FIG. 74 is a flow chart for explaining the operation of the present invention.

FIG. 75 is a flow chart for explaining the operation of the present invention.

FIG. 76 is a flow chart for explaining the operation of the present invention.

77 is a flowchart for explaining the operation of the present invention. FIG.

FIG. 78 is a flowchart for explaining the operation of the present invention.

FIG. 79 is a flowchart for explaining the operation of the present invention.

FIG. 80 is a circuit diagram of a modified example of the communication circuit between the camera body and the interchangeable lens.

FIG. 81 is an explanatory diagram of an auto-zoom program used in the present invention.

FIG. 82 is an explanatory diagram of an auto-zoom program used in the present invention.

FIG. 83 is an explanatory diagram of an auto-zoom program used in the present invention.

FIG. 84 is an operation explanatory view of the varifocal lens used in the present invention.

FIG. 85 is an operation explanatory diagram of the varifocal lens used in the present invention.

[Explanation of symbols]

 LE interchangeable lens BD camera body 101 in-lens control means 102 lens driving means 103 power supply means 104 in-body control means 105 operating means 106 starting means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takanobu Takamaki 2-3-13 Azuchi-cho, Chuo-ku, Osaka, Osaka International Building Minolta Co., Ltd. (72) Inventor Tokuji Ishida 2-chome, Azuchi-cho, Chuo-ku, Osaka No. 13 Osaka International Building Minolta Co., Ltd. (72) Inventor Hisayuki Masumoto 2-3-3 Azuchicho, Chuo-ku, Osaka City Osaka International Building Minolta Co., Ltd. (72) Inventor Sho Tokumaru Azuchi-cho, Chuo-ku, Osaka City 2-3-13 Osaka International Building Minolta Co., Ltd. (72) Inventor Toshiyo Yoneda 2-3-3 Azuchi-cho, Chuo-ku, Osaka City Osaka International Building Minolta Co., Ltd.

Claims (2)

[Claims] 1. A camera system comprising a replaceable lens and a camera body having a plurality of electrical contacts between the lens and the camera, for communicating various information through the contacts and supplying power from the camera to the lens. The power supply to the internal control means and the power supply to the lens drive means for supplying power to the lens provided inside the camera body, and the power supply means provided to the inside of the camera body and in the stopped state, only power to the control means inside the lens is supplied. In-body control means for controlling the operation of the camera so as to supply, an operation member provided in the lens for instructing lens drive, and the operation member is operated while the in-body control means is stopped. Then, there is provided a starting means for transmitting a signal for activating the in-body control means to the body side, and the in-body control means receives the activation signal. Interchangeable lens type camera system which is characterized in that the power supply to the lens driver. 2. The camera body is provided with a booster circuit for supplying power to a circuit of the camera, and when the booster circuit receives a signal from the starting means when boosting is stopped, the booster circuit starts operation based on the signal. The interchangeable lens type camera system according to claim 1.