JPH05203868A - Photographic lens, camera body, and camera system - Google Patents

Abstract

PURPOSE:To precisely detect the positions (focal length and subject distance) of a zooming lens group and a focusing lens group by comparing a counted value with a reference counted value and making a specific counted value correction. CONSTITUTION:A zoom code plate 71 divides the whole movement range of the zooming lens group into 26 and identifies the respective divided areas with 5-bit absolute position (focal length) information. A distance code plate 81 divides the whole movement range of the focusing lens group into 8 and identifies the respective divided areas with 3-bit absolute position (subject distance) information. Relative positions in the respective divided areas are detected by counting pulses outputted by pulsers 69 and 59. The border positions (switching point) of the respective areas of the code plate 71 and the marks of code sequences of the code plate 81 are utilized as reference values to correct the counted values of the pulsers. Then the counted values are compared with the reference values corresponding to the switching points to correct the counted values as specified.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a power zoom lens provided with an autofocus device, a camera body, and a camera system.

[0002]

2. Description of the Related Art In recent years, various lens shutter cameras equipped with a power zoom lens have been developed. The lens shutter type power zoom camera in which the lens cannot be replaced has a configuration in which the power zoom is controlled by the control means and the zoom operation switch provided in the camera body. In this type of lens shutter camera, since the lens and the body are integrated, power zooming is relatively easy. However, in a camera capable of exchanging lenses, for example, a single-lens reflex camera, even if an interchangeable lens is made to be a power zoom lens, there are many problems such as a complicated structure, so that the power zoom is not realized.

In order to use the focal length and the subject distance for photographing, the position of the focusing lens group (subject distance),
The position (focal length) of the zooming lens group must be detected. A method of detecting the absolute position of a lens group by a code plate is known as one of means for detecting the position of the lens group in a camera including a conventional autofocus device and a zoom lens. For example, in a conventional power zoom lens, its focal length is detected by a code plate. For example, a code plate extending along the movement direction of the zoom ring is fixed to a zoom ring that rotates around the optical axis or moves back and forth along the optical axis with zooming. The code reading member is fixed to the plate, and the code reading member reads the code on the code plate to detect the focal length. The detection of the position of the focusing lens group (focused object distance) is also performed by the same configuration. However, although this code plate allows the detecting means to detect the position of the switching point of the code, it cannot detect the position between the switching points. In other words, coarse detection was possible, but precise detection was not possible.

As another detecting means, there is a means for counting the number of pulses output in association with the rotation of the motor for driving the lens group (adding / subtracting depending on the driving direction) and detecting it as a pulse value. There is a possibility that the error of the count value may be integrated by this detecting means. Therefore, the pulse value is corrected when the lens group reaches the infinity end point position, the closest end point position or the wide-angle end point position, the telephoto end point position, or the like. However, with this configuration, when the power is turned off during counting and the count value disappears, or when the power is turned on after the lens is manually driven while the power is off, the current position of the lens group cannot be detected. ..

Further, since the count detection means may add up the error of the count value, when the lens group reaches the infinity end point position, the closest end point position or the wide angle end point position, the telephoto end point position, etc. In addition, the pulse value is corrected. However, with this configuration, the count value cannot be corrected unless the lens group reaches one of the end point positions, so if the drive operation of the lens group is repeated in a state where the end point position is not reached (within the range), an error occurs. There is a possibility that the error will be gradually accumulated and a large error will occur. That is, the detection accuracy becomes unreliable. In this way, the lens position (focused subject distance,
When accurate detection of the focal length) is not possible, so-called control zoom using the subject distance and the focal length cannot be performed. For example, constant image magnification zooming that maintains a constant image magnification determined by the subject distance and the focal length cannot be performed.

In the power zoom lens, when the zooming lens group (variator lens and compensator lens) for changing the focal length reaches the moving end, the zoom motor must be stopped. When the rotation of the zoom motor is stopped, the conventional stop means waits for a predetermined abnormality detection time, and when the zoom motor does not rotate even after the abnormality detection time elapses, the power is turned off to stop the zoom motor. Was there. However, conventionally, since the detection time is constant regardless of the rotation speed of the motor, the overload of the motor is large especially when the motor is driven at high speed, and the motor and the drive system are easily damaged. A similar problem occurs in a single-lens reflex camera equipped with an autofocus device in which a focusing lens is driven by a motor. In the present specification, a lens that drives a zooming lens group, a focusing lens group, and the like by a motor is called an electric lens.

In order to use the focal length and subject distance of the zoom lens for special photographing, it is necessary to detect the position of the focusing lens unit (subject distance) and the position of the zooming lens unit (focal length). .. As one of means for detecting the position of a lens group in a conventional camera provided with an autofocus device and a power zoom lens, a method of detecting an absolute position by a code plate is known. For example, in a conventional power zoom lens, its focal length is detected by a code plate. For example, a code plate extending along the movement direction of the zoom ring is fixed to a zoom ring that rotates around the optical axis or moves back and forth along the optical axis with zooming. The code reading member is fixed to the plate, and the code reading member reads the code on the code plate to detect the focal length. The detection of the position of the focusing lens group (focused object distance) is also performed by the same configuration. However, although the detecting means using the code plate can detect the position of the switching point of the code, it cannot detect the position between the switching points. That is, although coarse detection is possible, precise detection is difficult.

As a more precise lens position detecting means,
There is a method in which the number of pulses output in association with the rotation of a motor that drives the lens group is counted (added / subtracted according to the driving direction) and detected as a pulse value. Since the count value detection means may add up the error of the count value, the pulse value is reached when the lens group reaches the infinity end point position, the closest end point position or the wide-angle end point position, the telephoto end point position, etc. Is being corrected. However, according to this configuration,
If the lens drive is forcibly stopped for some reason, such as when the photographer holds the focus ring by hand, the motor is stopped at that position and the count value is corrected by recognizing that it is an end point. Or, there is a risk of malfunctioning such as resetting. Further, in this case, although the lens can be driven, there is a possibility that the lens cannot be moved beyond the stopped position.

In recent years, various lens shutter type cameras equipped with an autofocus device and a power zoom lens for zooming by a motor have been developed. The automatic focusing device of a single-lens reflex camera is configured such that a focusing lens group is driven by a motor and a power zoom lens drives the zoom lens group by a zoom motor according to the detection result of the focus detection device. In this motor drive, in order to move to the target position in the shortest possible time and not to overshoot the target position, the focusing lens group is driven at a high speed when the amount of movement is large, and as the amount of movement decreases, There is a method of gradually changing to low speed driving.
That is, the speed is changed stepwise according to the driving amount.

In the conventional speed control method described above, the control speed is determined by the interval of the pulses output in synchronization with the rotation of the motor, and when the pulses are not output within the set time, the motor is energized and the pulse is output within the set time. The control method is to turn off the power to the motor when the output is output to. However, in this control method, the energization time and the non-energization time are extremely changed, so that the speed fluctuation is large and the operation is not smooth. In other words, there is a problem that even if the average speed during a time considerably longer than the pulse interval is constant, the speed during a short time (1 pulse time or within several pulse times) changes greatly, and smooth driving cannot be performed. It was

The automatic focusing device of a single-lens reflex camera has a structure in which a focusing lens group is driven by a motor in accordance with a detection result of a focus detection device, and a power zoom lens drives a zoom lens group by a zoom motor. In this motor drive, in order to move to the target position in the shortest possible time and not to overshoot the target position, the focusing lens group is driven at a high speed when the amount of movement is large, and as the amount of movement decreases, There is a method of gradually changing to low speed driving. That is, the speed is changed stepwise according to the driving amount. In this conventional speed control method, the control speed is determined by the interval of the pulses output in synchronization with the rotation of the motor, and when the pulse is not output within the set time, the motor is energized and the pulse is output within the set time. Then, the control method was to turn off the power to the motor. However, in this control method, the energization time and the non-energization time are extremely changed, so that the speed fluctuation is large and the operation is not smooth. In other words, there is a problem that even if the average speed during a time considerably longer than the pulse interval is constant, the speed during a short time (within about one pulse interval) changes greatly, and smooth driving cannot be performed.

The conventional autofocus device for a single-lens reflex camera is
The focusing lens group is driven by an AF motor according to the detection result of the focus detection device. However, powering a zoom lens in a single-lens reflex camera complicates the mechanical and electrical linkage configuration with the camera body, makes it difficult to make it compatible with conventional interchangeable lenses and camera bodies, etc. It has not been realized because of.

The conventional single-lens reflex camera has a structure in which the drive of the motor is controlled by a microcomputer mounted on the body. With the conventional configuration, a plurality of processes cannot be executed at the same time.Therefore, when performing a complicated process that requires a relatively long time, for example, an automatic focus adjustment process, another process is executed after a certain automatic focus adjustment process is completed. ,
A plurality of processes are executed by the intermittent process of executing the automatic focus adjustment process again after the other processes are completed. Therefore, when a complicated process is executed, it is very slow to finish the whole process. Therefore, conventionally, the processes that can be executed intermittently are limited to simple processes if one is a complicated process (a process that requires time). Moreover, in the conventional single-lens reflex camera configuration, even if operation switches are provided on the shooting lens side, it is difficult for the camera body side to detect the status of those switches, so switches are inevitably provided on the camera body. Was spoiled.

A conventional autofocus device for a single-lens reflex camera is
The focusing lens group is driven by an AF motor according to the detection result of the focus detection device. However, powering the zoom lens in a single-lens reflex camera makes the mechanical and electrical linkage configuration with the camera body complicated, and it is difficult to make it compatible with conventional interchangeable lenses and camera bodies. Not realized by.

In the conventional single-lens reflex camera, the CPU (microcomputer) mounted on the body is used for the above A.
The configuration is such that the drive of the F motor is controlled. There has been one in which this AF motor is mounted on a photographing lens and the drive power of the AF motor is supplied from a battery in the camera body (Japanese Patent Laid-Open No. 62-176). However, in the conventional single-lens reflex camera, the power for driving the AF motor in the taking lens and the operating power of the lens control circuit for controlling the AF motor are
It was supplied from the body to the lens through the same terminal.
Therefore, when power is not being supplied normally, such as when the AF motor has an abnormality, the lens control circuit does not operate normally.The microcomputer in the body detects this abnormality and shuts off power to the lens. Was there. Moreover,
It was not known whether the cause of this abnormality was the AF motor, the lens control circuit, or the contact failure of the electrical contacts.
Furthermore, since not only the power to the AF motor is cut off but also the power to the lens control circuit is cut off, there is a problem that the lens control circuit does not function even when the lens control circuit is normal.

The interchangeable lens single-lens reflex camera has not been realized because the zoom motor and the battery are heavy, and the mechanism is complicated as compared with the body integrated type. In a single-lens reflex camera equipped with a zoom lens, it is convenient that the total length of the lens is short when the user does not take a picture when carrying or storing. However, in the conventional zoom lens, the photographer must operate the zoom operation ring to zoom to the focal length where the lens barrel becomes the shortest. Further, in the conventional power zoom lens, the photographer merely operates the zoom switch to perform power zoom in the tele direction or the wide direction. Therefore, the focal length often used by the photographer cannot be set unless the photographer manually operates the power zoom by operating the zoom operation switch.

In recent years, in a camera equipped with a power zoom lens, special photographing means utilizing an autofocus device and a power zoom lens has been developed. For example, the applicant of the present application filed an earlier application (Japanese Patent Laid-Open No. 2-85810-85815
No.), there is a constant image magnification zoom means for keeping the set image magnification constant. In this method, after setting the image magnification, a target focal length at which the image magnification becomes constant is calculated based on the defocus amount of the subject, and the power zoom is performed based on the target focal length. However, in a single-lens reflex camera, the coefficient related to the amount of rotation of the AF motor required to move the focus position by a unit length (hereinafter referred to as “K value”) differs depending on the focal length, so the defocus amount changes due to zooming. I will end up. Therefore, it is necessary to perform correction in advance in consideration of this change amount and to finally calculate the target focal length.
The arithmetic processing was complicated.

Further, the error of the defocus amount increases as the focusing lens group moves away from the in-focus position, and further there is an error of K value, a backlash of the lens drive system, an accumulation error of the rotation amount of the motor, and the like. It is not always possible to drive to the in-focus position by one calculation. Therefore, so-called hunting may be performed in which when the vehicle stops before the in-focus position, it is re-driven in the same direction and when it goes too far, it is re-driven in the opposite direction. In such a case, the target focal length must be recalculated every time the focusing lens group stops at the in-focus position. As described above, in the method of calculating the target focal length based on the defocus amount, the calculation value required for focusing control and the calculation value required for zooming control interfere with each other.

A lens shutter camera provided with a power zoom lens which is zoomed by a motor has been developed which has a so-called inter-exposure zoom function for zooming during exposure. However, in the conventional zooming during exposure, the zooming is performed from the start of exposure. Therefore, zooming during exposure in which the subject image has a core is not possible, and only the effect of flowing all the subject images can be obtained. Moreover, since the zooming speed is constant regardless of the exposure time (shutter speed), there is a problem that the shutter speed at which the inter-exposure zooming effect can be obtained is limited.

Further, in the single-lens reflex camera camera, there are problems such as a complicated structure and control, so that it is difficult to realize a power zoom. Therefore, zooming during exposure in a single-lens reflex camera is performed manually by the photographer by operating the zoom operation ring. However, it was difficult to keep the zooming speed constant. Furthermore, while it is possible to release the shutter during manual zooming,
With this, the subject image cannot have a core. Even if it is attempted to start manual zooming after the shutter is released, it is difficult to grasp the timing of starting zooming in shooting at a medium to high shutter speed. Therefore, it is almost impossible to start manual zooming during exposure after the shutter is released at medium and high speeds.

[0021]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and the objects thereof are as follows.

It is an object of the present invention to provide a power zoom lens capable of precisely and accurately detecting the lens position of a taking lens, for example, the positions of the zooming lens group and the focusing lens group (focal length, subject distance). It is another object of the present invention to provide a power zoom lens, a camera body, and a camera system capable of performing power zoom in a camera with interchangeable lenses.

It is an object of the present invention to provide a power lens in a lens having an autofocus mechanism or a power zoom mechanism, which prevents an overload on the lens driving motor and the lens driving mechanism and does not malfunction even when receiving an external force. And

It is an object of the present invention to provide a lens driving device which can drive a lens at a constant speed with little fluctuation.
It is another object of the present invention to provide a power zoom lens, a camera body, and a camera system that can perform zoom control on a single-lens reflex camera at a constant speed.

According to the present invention, the power of the zoom lens can be increased, and the operation switch can be provided on the photographing lens, and the power lens, the camera body, and the power lens which can quickly perform complicated processing simultaneously in parallel are provided. It is an object of the present invention to provide a camera system.

The present invention has been made in view of the above problems of the conventional camera. In a camera system having a detachable taking lens and a camera body, the camera body to the taking lens is used for a control circuit, a zoom motor, and the like. It is an object of the present invention to provide a camera system capable of independently supplying and shutting off power for driving the vehicle.

According to the present invention, in a camera with interchangeable lenses, for example, a single-lens reflex camera, power zooming can be performed up to the focal length arbitrarily set by the photographer, and when not in use, the power is automatically stored up to the shortest focal length. An object is to provide a zoom lens and a camera.

It is an object of the present invention to provide a power zoom lens and a camera system which are capable of zooming control in which focusing control and power zooming control do not interfere with each other and which can be easily operated.

It is an object of the present invention to provide a power zoom camera having an inter-exposure zoom function which enables easy and effective inter-exposure zoom. A further object of the present invention is to provide a camera system that has a zoom function between exposures and has interchangeable lenses.

[0030]

SUMMARY OF THE INVENTION A taking lens according to the present invention has an optical system including an optical system including a movable lens group movable in the optical axis direction, and a lens moving mechanism for holding the movable lens group movably in the optical axis direction. Code reading means for reading a code relating to the position of the code member and the lens group formed on the code member, at least one of which moves in conjunction with the moving lens group in the lens; Counting means for counting a specific position of the moving lens group as an initial value; Lens position detecting means for detecting the position of the moving lens group based on the count value of the counting means; Code reading means for switching points of each code Reference count value memory means that stores the position of the focusing lens group when the detection is made as a reference count value; and Every time the code reading means detects the switching point of the code, the count value of the counting means is compared with the reference count value corresponding to the switching point to perform a predetermined count value correction. It is characterized in that it comprises a correction means. Further, in the photographing lens of the present invention, the reference count value memory means that stores the position of the focusing lens group when the specific code is detected by the code reading means as a reference count value; and the code reading means, It is also possible to provide a count value correcting means for comparing the count value of the counting means with the reference count value corresponding to the specific code and performing a predetermined count value correction each time the specific code is detected.

Further, the present invention according to claim 13 is an optical system comprising a moving lens group and a lens moving mechanism for movably holding the moving lens group within a predetermined moving range in the optical axis direction. An electric means for driving the mechanism to move the movable lens group; a counter for counting the inoperable time when the lens moving mechanism becomes inoperable during the operation of the electrically operated means; Control means for controlling the operation speed of the means, and for stopping the electric means when the lens moving mechanism becomes inoperable when the counter counts a time corresponding to the operation speed. It is characterized by

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 1 is a block diagram showing a main configuration of a body portion of an automatic focusing (AF) single-lens reflex camera to which the present invention is applied, FIG. 2 is a block diagram showing a main configuration of the power zoom lens, and FIG. It is a circuit block diagram of the power zoom lens.

This AF single-lens reflex camera comprises a camera body 11 and a taking lens (power zoom lens) 51 which can be attached to and detached from the camera body 11. Most of the subject light flux that has entered the camera body 11 from the zoom optical system 53 of the taking lens 51 is reflected by the main mirror 13 toward the pentaprism 15 that constitutes the finder optical system, and part of the reflected light is measured. It is incident on a light receiving element (not shown) of the IC 17 for use. On the other hand, of the subject light flux that has entered the camera body 11, the main mirror 13
Part of the subject light flux that has entered the half mirror unit 14 passes through this portion, is reflected downward by the rear sub-mirror 19 and enters the CCD sensor unit 21 for distance measurement.

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

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

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

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

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

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

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

The main CPU 35 is provided with a photometric switch SWS which is turned on by half-pressing a release button (not shown), a release switch SWR which is turned on by fully pressing the release button, an autofocus switch SWAF, a power source for the main CPU 35 and peripheral devices. A main switch SWM for turning on / off, modes such as AF mode and exposure mode, and up / down switches SWUP / DOWN for changing parameters such as shutter speed are connected.

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

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

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

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

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

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

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

The above zoom speed changeover switch 75
Each contact of the zoom mode changeover switch 77 is connected to the lens CPU 61. The lens CPU 61 is
Upon receiving these switch operations, control processing relating to power zoom is performed.

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

In FIG. 3, a more detailed circuit of the power zoom lens 51 is shown by a block. Electrical contact group LC
Is the CONT terminal connected to the interface 62, RES
It has 5 terminals: terminal, ~ SCK terminal, DATA terminal and GND terminal. Among these terminals, CONT terminal and GND
The power supply voltage necessary for the operation of the lens CPU 61 and the like is supplied from the camera body 11 via the terminals, and communication is performed via the remaining RES terminal, ~ SCK terminal and DATA terminal. The RES terminal is mainly used for a reset signal, the ~ SCK terminal is used for a clock, and the DATA terminal is used for communication of data such as predetermined information and commands. In this specification, the symbol "~" means a top bar, and the symbol preceded by the symbol "~" is
Indicates active low or inverted signal.
The power supply pin LPC is composed of a VBATT terminal and a PGND terminal. Electric power required for driving the zoom motor 65 is supplied from the battery 20 of the camera body 11 via these VBATT and PGND terminals. The power supply is controlled by the CPU 35 via the peripheral control circuit 23. Incidentally, reference numeral 91 in the figure is a clock generation circuit. Also, VBATT
The terminals are respectively connected to the voltage monitoring port P12 of the lens CPU 61 via the motor drive IC 63 and the resistor R4.

[Main Processing of Lens CPU] The main processing of the lens CPU 61 will be described with reference to FIGS. 6 and 7. Tables 1 and 2 show instruction commands, Table 3 shows commands (data) for sending various body side data from the camera body to the lens side, and commands for sending various lens side data from the lens. Table 4 shows a memory map of the RAM 61b of the lens CPU 61 in Tables 5 to 11.

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

[Table 6]

[Table 7]

[Table 8]

[Table 9]

[Table 10]

[Table 11]

In the main routine, first the lens CPU 6
1 sets the high-speed operation mode, inhibits interrupts, sets the stack address, initializes the port P, and inputs the current absolute zoom code from the zoom code plate 71 (S101 to S109). Then, the data calculated based on the zoom code is stored in the RAM 61b, and the data group (LC0 to LC5 in Table 5) stored in the RAM 61b by communication (old communication) by the clock signal of the camera body 11 is performed.
LC15) is transmitted to the camera body 11 (S11
1). Then, when the transmission is completed, the 3 ms timer is started (S113).

After that, when the old communication ends normally, a KAFEND signal ("L" level) is output from the interface 62, and this is waited until the 3 ms timer expires (S115, S117). If the old communication end signal (KAFEND signal) is not output before the 3 ms timer expires, it means that the old communication did not end normally, so stop processing (stopping the clock 91)
To stop the processing (S115, S117, S1
19). When the KAFEND signal is output before the time is up, it is normal operation, so a command is received from the camera body 11 by communication, but if it is not a new communication command that identifies that the camera is capable of new communication, new communication is possible. Since the body may not be a proper body, stop processing is performed (S121, S123, S119). What is new communication?
This is a communication in which commands and data can be transmitted and received bidirectionally between the camera body and the taking lens in synchronization with the clock of the taking lens.

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

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

Next, a communication interrupt from the camera body
Check if there was a stop request (whether the flag F_STNDBY is set), or if there was a power request within the 2ms timer interrupt (whether the flag F_LBATREQ was set), and if there was no stop request or the power request If there is, a constant image magnification zoom process (ISZ process) is performed and then the process returns to the NIOST process, that is, S131 of the main routine and the above processes are repeated (S143, S145, S147). Note that the power request is a request to the camera body 11 (body CPU 35) to supply the power of the battery 20 in the camera body 11 to the power zoom lens 51 for driving the zoom motor 65 via the power pins BPC and LPC. It means to do.

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

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

When entering the communication interrupt, first, the communication interrupt is prohibited, and the stop flag (F_STNDBY) and NG flag are set.
Camera body 11 after clearing (F_SCKNG, F_CMDNG)
Command from (S201, S203, S20
5). Then, the upper 4 bits of the input command are checked, and the process proceeds to the subroutine corresponding to the upper bit (S207 to S229). Further, in each subroutine, processing according to the lower bit is performed. In this example,
LB command subroutines, BL command subroutines, instruction code subroutines, 16 subroutines that are identified by upper bits (4 bits)
byte data, first half 8 byte data, second half 8 byte
An e-data subroutine, a byte-by-byte data subroutine, and a test mode subroutine are provided (S2
09, S213, S217, S221, S225, S2
29).

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

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

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

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

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

Next, the zoom speed changeover switch 75
And the flags for controlling the motor are set based on the control flags such as the flags F_MOVTRG and F_MOV, and PZ is set.
Input of current values of pulse and focal length and RAM 61b
Memory for PZ pulse correction if necessary,
When the current position of the zooming lens group 53Z is unknown, the position initialization (PZ-INITPOS) processing for the zooming lens group 53Z is performed, and the zoom code is separated as the previous zoom code for the next 2ms timer interrupt processing. The address is stored in the memory (S353, S355, S357).

Constant image magnification zoom mode (F_ISM = 1)
If it is (ISZ processing), perform ISZ memory processing,
Zoom switch 7 for the next 2ms timer interrupt processing
The states of 5 and 77 are saved (S357 to S361). Then, in accordance with the flag set in S353, drive control of the zoom motor 65, setting of an interrupt bit flag, duty ratio increase processing for PWM control, and P
During the WM control, the PWM timer is started (S363). Then, the interrupt is permitted and the process returns (S395).

In the manual zoom (MZ) subroutine, first the zoom motor 65 is stopped, the LED of the PZ pulser 69 is turned off, the battery request (power request) flag (F_LBATREQ) is cleared, and each bit of the PZ lens state PZ_LST data is set. Is cleared (S371,
S373, S375, S379).

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

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

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

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

In the PWM control, the speed is controlled by increasing or decreasing the ratio of the energization time and the non-energization time (PWM duty ratio T_PWMBRK). That is, in this embodiment, if the PZ pulse does not come within the set time, the PWM duty ratio T_PW
To increase the speed by increasing MBRK and increasing the energization time to the zoom motor 65, and to reduce the PWM duty ratio (T_PWMBRK) to shorten the energization time to the zoom motor 65 if the PZ pulse comes within the specified time. The constant speed control is realized by the control that the speed is reduced by (see FIG. 14).

Further, in this embodiment, the duty ratio is set to the minimum (the energization time is the shortest) at the time of start-up (when the motor is changed from the stopped state or the brake state to the operating state), and then the zoom motor 65 is set. Energization is started, and the pulses output by the PZ pulsar 69 are counted. Then, when the pulse is not output within the set time, the duty ratio is gradually increased, while when the pulse is output within the set time, the duty ratio is lowered, so that the zoom motor 65 outputs the pulse at the set time cycle. Acceleration control and constant speed control.

First, it is checked whether the zoom motor 65 is started (whether the flag F_START is set) (S401). If it is the start, in order to start at the lowest speed, the PWM timer T_PWM is cleared, the PWM duty ratio T_PWMBRK is set to the minimum value (lowest speed), and S405
If it is not activated, the process proceeds to S405 without doing anything (S401, S403). In addition, by setting the duty ratio at the time of starting the motor to the minimum, it is possible to enable a fine driving operation by the photographer and obtain a natural zooming operation.

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

Next, it is checked whether the PWM drive or the DC drive is in accordance with the speed. If the PWM drive is selected, the process proceeds to S411, but if the DC drive is selected, the process directly returns (S40).
9). In S411, the PWM timer T_PWM is incremented by 1. Then, it is checked whether the incremented value exceeds the value of the pulse cycle T_PWMPLS, and if it exceeds, the PWM duty ratio (T_PWMBRK) is increased, and if it does not exceed, nothing is done (S413, S41).
5). In other words, P within the set time (pulse cycle T_PWMPLS)
If Z pulse does not come, PWM duty ratio (T_PWMBR
K) is increased to increase the energization time and speed up to the set speed.

Then, the PWM duty ratio (T_PWMBR
K) is set, the PWM timer (T_PWM) is started, the 2ms timer interrupt is enabled, and the process ends (S41).
7, S419). Note that S407 to S419 are shown in FIG.
It corresponds to the time points (A), (C), and (D) in 4.

When the PZ pulse is output from the PZ pulser 69, the PZ pulse count interrupt process shown in FIG. 12 starts. In the PZ pulse count interrupt process, the pulse period T_PWMPLS is first compared with the PWM timer T_PWM, and if the pulse period T_PWMPLS is larger, the pulse period T_PWMPLS
Since the pulse is output in the PWM duty ratio T_PW
After lowering MBRK, clear PWM timer T_PWM, and if pulse period T_PWMPLS is smaller, 1 pulse period T_PWMP
Since the pulse is output after LS, PWM timer T_PWM
To end (S421, S423, S42
5).

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

In the PWM control of this embodiment, the pulse period T_
The PWMPLS is set in three stages of 8 for low speed, 4 for medium speed, and 3 for high speed according to the speed designated by the zoom speed changeover switch 75 or the like. The PWM timer T_PWM is cleared when the motor is started and when the PZ pulse is output from the PZ pulser 69 and the PZ pulse count interrupt process is started, and then the timer is counted in S411 of the 2 ms timer interrupt routine until the PZ pulse is output. Will be up. Therefore, the PWM timer T_PWM almost represents a multiple of the elapsed time since the output of the previous PZ pulse. However, the output interval of PZ pulse is 2 even at high speed.
It shall be larger than the ms timer interrupt cycle.

For example, when the speed is 3 (pulse cycle T_PWMP
The elapsed time since the previous PZ pulse output of LS = 3) is 2 ms × 3 = 6 ms. When the speed is low 8, the pulse cycle T_PWMPLS = 8. The processing at the low speed will be described with reference to the flowcharts shown in FIGS. 11 and 12. In S413 of the 2 ms timer interrupt, when it is determined that the pulse period T_PWMPLS is smaller than the PWM timer T_PWM, that is, 2 after the previous PZ pulse was output.
When the time longer than ms × 8 = 16 ms has elapsed, the process proceeds to the process of increasing the PWM duty ratio (S415).

On the contrary, in the PZ pulse count interrupt process, in the check of S421, the pulse cycle T_
When PWMPLS is larger than PWM timer T_PWM, that is, 2ms x 8 = 16ms since the last PZ pulse was output.
Since the PZ pulse was output before the elapse, PW
The M duty ratio is lowered (S423).

As described above, the set pulse cycle T_PW
By increasing or decreasing the PWM duty ratio (T_PWMBRK) so that the PZ pulse is output by MPLS, the PZ
It achieves constant speed control in which the pulse output interval is constant. Further, by changing the set pulse period T_PWMPLS, the output interval of PZ pulses, that is, the control speed can be changed.

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

First, the principle of constant image magnification zoom will be described. In order to simplify the description, description will be given based on a zoom lens including two groups, a front group and a rear group. The image magnification m of this zoom lens is expressed by the following equation. m ₁ = x / f ₁ m ₂ = f / f ₁ m = m ₁ · m ₂ = x · f / f ₁₂ ² Here, m: image magnification m ₁ : front group magnification m ₂ : rear group magnification f ₁ : focal length of the front lens group f: combined focal length x: amount of front lens unit extension (movement amount) from the ∞ end

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

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

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

The above is the principle of constant image magnification zooming.
In actual control, the lens extension amount is managed by a focal length code plate, an AF pulsar, or the like. AF
The pulsar is configured to have a substantially linear relationship with the delivery amount. Therefore, the feed-out amounts x and x ₀ in the equation can be replaced with the AF pulse number from the ∞ end, and the defocus amount can be replaced with the defocus pulse number.

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

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

(Ii) Next, and from the equation, x ₀ · f ₀
Is calculated, and the result is set as x ₀ f ₀ . x ₀ f ₀ = x ₀ · f ₀ (10)

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

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

(Ii) The magnification m ₀ is as described above and (10)
From the formula, it can be obtained as the following formula. m ₀ = x ₀ f ₀ / (f ₁ ² · k) (13) (iii) Obtain the target focal length f. The target focal length f is the same as in (iii) of (1) above,
I want it. The focal length f ₁ of the front lens group is data unique to the lens and is stored in the lens ROM 61a.

[ISZ Processing] Next, the calculation processing relating to the constant image magnification (image size designation) zoom (ISZ) of the present embodiment based on the above principle will be described in more detail with reference to the flowcharts shown in FIGS. 15 and 16. Explained. This processing is executed by the lens CPU 61. The image magnification is set by the zoom speed changeover switch 75 or the set switch (SL switch). Details will be described later with reference to FIG. 90. IS
The Z calculation relates to calculation of a set image magnification and calculation of a focal length for maintaining the set image magnification. The calculation of the focal length may be performed with or without focusing as a condition, with the shooting lens, or with the camera body.
When the focus is set as the condition, the image magnification and the target lens extension amount are calculated based on the lens extension amount at the time of focusing. When focusing is not a condition, the image magnification and the target lens extension amount are calculated based on the defocus amount and the current focal length.

First, the flag (F_STIS, F_IS) is used to determine how the communication interrupt is prohibited (SEI) and the ISZ operation is performed based on the communication information transferred from the camera body 11.
Check by ZM, F_ISZFOM, F_ISZXOM) (S45
1, S453, S465, S477, S479). These flags indicate that ISZ communication has been performed with the camera body 11, and are set (stored) in the RAM 61b when each communication is performed. Then, the necessary calculation is performed based on these flags. F_
STIS is a flag for instructing to use data transferred from the body, F_ISZM is a flag for instructing to use data of the photographing lens, F_ISZFOM is a flag for instructing to use focal length f data from the body, and F_ISZXOM is an object from the body. This is a flag for instructing to use the distance x data.

When performing a constant image magnification zoom by the image magnification sent from the camera body 11 (when F_STIS = 1)
Allow communication interrupts (CLI), and
The equation (10) is used to obtain x ₀ × f ₀ , which is stored in a predetermined address of the RAM 61b, the interrupt is prohibited, and the flag F_STIS is cleared (S455 to S463).

When the memory processing of the image magnification is performed and the constant image magnification zoom is performed according to the focal length and the subject distance which are already stored (when F_STIS = 0, F_ISZM = 1), the interruption is permitted, and X ₀ × f ₀ is calculated from the subject distance (the number of feeding pulses) x ₀ and the focal length f _0, and the image magnification m ₀ is calculated by the above equation (13) to obtain RA
The memory is stored in a predetermined address of M61b, the communication interrupt is prohibited, and the flag F_ISZM is cleared (S465 to S47).
5).

Focal length f sent from camera body 11
_When performing a constant image magnification zoom with ₀ and subject distance (number of feeding pulses) x ₀ (F_STIS = 0, F_ISZM = 0 and F_ISZFOM = 1, F_ISZXOM = 1), first the received focal length f ₀ and subject distance based on the x ₀ x ₀ f ₀
Then, the image magnification m ₀ is calculated by the equation (13), interruption is prohibited, and the flags F_ISZFOM and F_ISZXOM are cleared (S477 to S489). If neither of the above is true, communication with the camera body 11 regarding the calculation of ISZ has not been performed, and therefore nothing is done.

Next, the flag F_PR is used to determine whether the defocus amount Δx already sent from the camera body 11 is valid.
Checked by EOK status and flag F_FP if valid
Although RE is set, if not valid, the flag F_FPRE is not set (S491, S493).

Then, it is checked whether or not it is the ISZ zoom mode, and if it is the ISZ zoom mode, then it is checked whether or not the current position (subject distance) of the focusing lens 53F is the flag F_AFPOS = 1.
If it is known (F_AFPOS = 1), the process proceeds to the FPRE-OP process for controlling using the predictor calculation result, and if it is not known, the ISZ process is exited (S495, S49).
7).

If not in the control zoom (ISZ) mode,
Clear flags F_FPREOK, F_FPRE, F_ISOK respectively,
Further, the logical sum of each bit data of the predetermined address (LNS_INF1) and each bit of the bit “00000111B” is stored in the predetermined address (LNS_INF1) and the ISZ process is exited (S495, S498, S499).

"FPRE-OP processing" S501 to S51
Predictor calculation result (defocus amount) shown in 3
A target focal length f is calculated based on (FPRE-OP)
The processing will be described with reference to the flowchart in FIG. This is a process executed by the lens CPU 61, and when the defocus amount is sent from the camera body 11 by communication with the camera body 11 (during this communication, the flag F_FPRE is set (memory) in the RAM 61b). , And communication with the camera body 11 regarding ISZ, S453 to S463, S465 to S475, or S477 to S489 are executed to change the value of x ₀ f ₀ , and the flag F_FPRE is set by S491 to S493.
Is executed when is set. This flag F_FPRE
Is a flag for deciding whether or not to execute the calculation of the target focal length f based on the defocus amount, f = x ₀ f ₀ / (x + Δx).

Upon entering this processing, it is checked whether or not the flag F_FPRE is set, and it is determined whether or not the arithmetic processing with the predictor amount is to be performed (S501).
If the flag F_FPRE is not set, the process jumps to S515, and if it is set, the following processing is performed.

First, the flag F_FPRE is cleared, the communication interruption is prohibited, and the target focal length f is obtained by the equation (12) using the predictor amount to prohibit the communication interruption (S503).
~ S509). Next, the target focal length f is converted into the target PZ pulse number from the WIDE end and stored in a predetermined address (PZPFPRE) of the RAM 61b, and a flag F_FPREOK indicating that the calculation by the predictor amount is effective is set. The process proceeds to S515 (S511, S513).

Steps S515 to S521 are processes for obtaining the target focal length f based on the current AF pulse (the number of feeding pulses). In step S515, interrupt permission (CLI) processing is performed, the target focal length f is calculated by the equation (11), and the RAM is calculated.
The memory is stored in a predetermined address (ISZ_FL, H) of 61b, and interrupt prohibition (SEI) processing is performed (S515, S51).
7). Further, the calculated target focal length f is converted into the target PZ pulse from the WIDE end, and the pulse conversion value is stored in the RAM.
The data is stored in a predetermined address (PZPF) 61b (S51).
9, S521).

Here, LNS_I calculated in S529
The contents of bits 3 to 7 of NF1 will be described. LNS
The information of _INF1 (see Table 4) is information that is periodically sent from the lens to the body by communication with the camera body. Among them, bits 3 to 7 are information regarding the ISZ mode.

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

Bits 3 to 5 indicate the difference between the target PZ pulse number and the PZ pulse number at the current position, that is, the PZ pulse number required to move from the current position to the target position, as the total number of PZ pulses (from the WIDE end to TELE). The approximate value divided by the number of PZ pulses required to move to the end is 0 to 7 /
It is expressed in 1/8 unit in the range of 8. The weight is 1 for bit3
/ 8, bit4 is 1/4, and bit5 is 1/2. If the current position and the target position match, the above value is 0, so all the bits 3 to 5 are cleared to "0", and if the current position is the WIDE end and the target position is the TELE end or vice versa, it becomes 7/8. Therefore, bits 3-5 are all "1"
Is set to.

As described above, in the ISZ mode, the camera body 11 receives the LNS_INF1 information from the taking lens 51 periodically or when necessary, thereby transmitting appropriate ISZ control information to the taking lens 51. it can.

Next, the predictor calculation result is valid (F_PR
Check if EOK = 1), and if valid, calculate the target PZ pulse count (PZPFPRE) calculated using predictor calculation.
) Is stored in the accumulator (ACC), and if not valid, the target PZ pulse number (PZPF) obtained based on the current AF pulse number is stored in the accumulator (S52).
3, S525, S527). Next, based on the target PZ pulse number entered in the accumulator, bits 3 to 7 of LNS_INF1
Value is calculated and a predetermined address (LNS_IN
The memory is stored in bits 3 to 7) of F1 to perform interrupt prohibition (SEI) processing (S529, S531).

Then, the constant image magnification zoom mode is selected, and the current position (focal length) of the zooming lens group 53Z is obtained (flag F_PZPOS =
1), and that the zoom is at a constant image magnification (flag F_
The following processing is performed under the condition of ISOK = 1). If any of the above conditions is missing, the process jumps to S551 (S533 to S5).
37).

The target focal length (PZ pulse number) calculation based on the predictor calculation result is valid (flag F_FPREOK
= 1) and the ISZ control flag is set (flag F_ISZD = 1), the number of PZ pulses (according to the equation (11)) obtained by using the predictor calculation result is set as the target pulse number and the predetermined number of RAM 61b is set. The data is stored in the address (PZPTRGT) (S539, S541, S543). But,
The calculation of the target focal length based on the predictive amount is invalid (F_FPRE
If OK = 0) or if the ISZ control flag is cleared,
Based on the AF pulse (number of feeding pulses) at the current position (1
The number of PZ pulses obtained by the equation (2) is stored in the predetermined address (PZPTRGT) (S539, S541, S5).
45). The flag F_ISZD is data sent from the body 11 by communication and stored in the RAM 61b. When F_ISZD = 1, the ISZ control is executed by the calculated value based on the predictor calculation result, and when F_ISZD = 0, the current position of the AF pulse is determined. The ISZ control is executed with the calculated value.

Then, the zoom speed data of ISZ (bits 6 and 7 of BD_ST1) sent from the camera body 11 by communication and stored in the RAM 61b is stored in the RAM 6.
It is stored in a predetermined address of 1b (bits 2 and 3 of SPDDRC2), the constant image magnification zoom flag F_ISZ is set, interrupts are enabled, and the process returns (S547, S549, S5).
51). This constant image magnification zoom flag F_ISZ is used by the lens CPU 61 to calculate the target focal length and the zoom motor 6
9 shows that the drive setting of 9 is completed and the preparation for driving the zoom lens group 53Z is completed. When this F_ISZ is set, constant image magnification zoom processing is performed in the 2ms timer interrupt routine. Also, PZPTRGT, SPDD
The RC value is also used in the 2ms timer interrupt routine.

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

Upon receiving the STANDBY command, the lens CPU 61 sets the flag F_STNDBY, transmits a command reception completion signal to the body 11, permits the communication interrupt, and returns (S601, S602, S60).
3). The lens CPU 61 checks the flag F_STNDBY in S143 of the main routine, and checks this flag F_ST
When NDBY is set, the clock 91 is stopped to shift to the low power consumption state (standby mode) (FIG. 7).
reference).

The AF-INTPOS command is a command sent after the camera body 11 has moved the focusing lens 53F to the ∞ end by the AF motor 39, and is an AF for clearing the AF pulse counter of the taking lens 51.
Is an initialization processing command of. This AF-INTPOS
FIG. 20 shows a flowchart regarding the processing of the lens CPU 61 when a command is input.

The lens CPU 61 uses the AF-INITPO
When the S command is input, the distance code data is first input from the distance code plate 81 (S611). If the distance code data is at the ∞ end (far end), the AF pulse current position data (AFPXL, H) and AF pulse start position data (AFPSTRTL, H) provided in the RAM 61b are cleared, and the focusing lens 53F A flag F_AFPOS for identifying that the current position is known is set and S61 is set.
If it is not the ∞ end, the process proceeds to S5 and the process proceeds to S615 (S612 to S614). Then, the command reception completion signal is output to the body 11, the communication interrupt is permitted, and the process returns (S615, S616).

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

When the PZINTPOS code is input, the lens CPU 61 clears the flag F_PZPOS, sets each flag F_BATREQ, F_IPZB, F_MOV, and sets the lens RAM.
Predetermined data (minimum speed, direction TELE) is stored in SPDDRC 61b of 61b, and PZPA2B of the PZ pulse counter that counts PZ pulses from the current position to the code boundary is set to 0 (S621 to S624). Then, the command reception completion signal is output, the communication interrupt is permitted, and the process returns (S625 to S626). Based on these set values, the power zoom-related (PZ) initialization operation is performed during the 2 ms timer interrupt processing.

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

The lens CPU 61 uses this RETRACT
-When the PZ command is received, the current focal length data is stored in the predetermined address (RETPOSL, H) of the lens RAM 61b, and the PZ pulse data (lens-specific data) that minimizes the lens barrel length is stored in the predetermined address of the lens RAM 61b. Set to (PZPTRGT) and set predetermined data (highest speed) to SPDDRC2 (S631, S632, S632-).
2). Then, each flag F_BATREQ, F_IPZB and flag F_
MOVTRG is set, a command reception completion signal is transmitted, a communication interrupt is permitted, and the process returns (S634 to S63).
6).

The focal length data before retracting is stored in the camera body 11 by another communication command (FOCALLEN-X command). Note that the flag
F_BATREQ is a flag that requests the power zoom lens 51 to supply power for power zooming, and flag F_IPZB controls zooming in the lens (ISZ, PZ-INIT).
The flag F_MOVTRG is used to move the zooming lens 53Z to the target pulse position set in the address PZPTRG.
This is a flag to be executed in the ms timer interrupt processing.
In the 2ms timer interrupt routine, the storing operation for the zooming lens 53Z is performed based on these set values.

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

The lens CPU 61 is PET-PZPOS.
When the command is received, the focal length data before the retract (RETPOSL, H) transmitted immediately before the retract power zoom included in this code is set to a predetermined address (FCLL, H) of the lens RAM 61b (S641). At this address RETPOSL, H, the focal length data before storage sent from the camera body 51 by another communication command is stored. Then, the focal length data is converted into a target pulse number, which is stored as a target pulse number PZPTRG in a predetermined address of the lens RAM 61b, and SPDDRC
A predetermined PZ speed data (high speed) is stored in 2 and flags F_BATREQ, F_IPZB, F_MOVTRG are set, a command reception completion signal is transmitted, a communication interrupt is permitted, and the process returns (S642 to S646). In addition, this restoration process also
It is executed in 2ms timer interrupt processing.

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

When the IPZ-STOP command is input, the lens CPU 61 clears the flag F_ISOK, and further a predetermined flag (F_MOVT) relating to the execution of the power zoom operation.
Clear ARG, F_MOV, F_ISZ) (S651, S6)
52). Then, the command reception completion signal is output, the communication interrupt is permitted, and the process returns (S653, S65).
4). Since these flags are cleared, control power zooming such as ISZ other than manual power zoom is not performed in the 2 ms timer interrupt process.

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

The lens CPU 61 is ISZ-MEMOR.
When the Y command is input, the current value of the AF pulse counter
(AFPXL, H) is stored in the ISZAF pulse memory (ISZ_AFPL, H) (predetermined address of the lens RAM 61b), and the current focal length value (FCLXL, H) is stored in the ISZ focal length memory (ISZ_FCL).
L, H) (a predetermined address of the lens RAM 61b) is stored (S661, S662). Then, the flag F_ISZM is set, the command reception completion signal is output, the communication interrupt is permitted, and then the process returns (S663 to S665). Based on these values, the ISZ operation shown in S465 to S475 of FIG. 15 is performed.

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

The lens CPU 61 uses this ISZ-STA.
When RT command is input, each flag F_BATREQ, F_IPZ
Set B and F_ISOK, output the data transmission completion signal,
Allow communication interruption and return (S671-S67
3). Based on these flags, the 2 ms timer interrupt process and the processes after S537 in FIG. 18 are performed.

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

The PZ-BSTATE command (20) is
This is a command for sending data required for ISZ (constant image magnification zoom control). In the data sent by this command, the focusing lens 53F is at the far end (infinity end) (F_ENDF = 1) or near end (closest distance end) (F_
ENDN = 1), firm move (F_FARM = 1), near move (F_NEARM = 1), overlap integration (F_OVAF = 1), moving object prediction mode (F_MOBJ =
1), whether it is in focus (F_AFIF = 1), whether to store the image magnification according to a command (communication) of the body, or whether to store it according to the judgment of the lens itself (lens CPU 61) (F_ISM = 1 ) Etc. are included. FIG. 27 shows a flowchart regarding the processing when the PZ-BSTATE command is received.

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

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

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

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

In the BODY-STATE0 data, as information regarding the power zoom mode of the camera body 11, for example, information such as constant image magnification zoom (ISZ), inter-exposure zoom (EXZ), and manual power zoom (MPZ) is placed in the lower 3 levels. In the upper 5 bits included in the bit, whether the power supply of the body circuit system is on (F_VDD = 1), the photometric switch is on (F_SWS = 0), or the body 11
Is power being supplied to the zoom motor from (F_BATT =
1) Information about whether the AF / MF switch (not shown) of the body 11 is AF or MF (whether F_SWAF = 1 or not) and whether the AF mode is single or continuous is entered.

The flag F_BATT is set on the camera side (main CP
U35) sets this when supplying power to the terminal VBATT. On the other hand, on the lens side, the lens CPU 61 monitors the voltage level of the terminal VBATT via the port P12 and sets the flag F_VDET when the voltage is supplied. Then, the flag F_BDET is set to POFF-STATE.
It is taken into the camera side (main CPU 35) by communication. The camera side recognizes that power is being normally supplied because the flag F_BDET is set. When the flag F_BDET is cleared even though the flag F_BATT is set, it is recognized that some abnormality has occurred, and the power supply to the terminal VBATT is stopped.

BODY-STATE1 command is BOD
It is a command related to data transmission regarding the state of the camera body 11 similar to the Y-STATE0 command, and includes sequence state information of the camera body 11. FIG. 29
FIG. 9 shows a flowchart regarding the process when the BODY-STATE1 command is received.

The lens CPU 61 uses the BODY-STAT
When the E1 command is received, a command reception completion signal is transmitted to send 1-byte data (BOD
Y-STATE1) and input B of the lens RAM 61b.
Store in D_ST1 (S721 to S723). If the flag F_IPZD is set, the flag F_ISOK is cleared and the flag F_MOVT of the address BD_ST1 is further cleared.
Although RG, F_MOV and F_ISZ are cleared, the above process is not performed unless the flag F_IPZD is set (S72).
4, S725, S726). Then, the data input completion signal is output, the communication interrupt is finally permitted, and the process returns (S724, S727, S728).

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

F_IPZD is IPZ-S as described above.
It is a flag that determines whether to perform the same operation as TOP. F_MPZD is a flag that determines whether or not manual power zoom is prohibited, and manual power zoom is prohibited when F_MPZD is set. The flag F_MPZD is referred to in the 2 ms timer interrupt process. F_ISZD is I
This is a flag that determines whether the SZ control is performed with the focal length obtained based on the number of AF pulses at the current position (in focus) or the focal length obtained with the predictor amount. This flag is an ISZ operation processing routine (S541 in FIG. 18).
Referenced in. F_ISSPA and F_ISSPB
Is a flag that determines the ISZ control speed.
8 is referred to in S547.

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

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

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

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

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

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

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

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

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

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

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

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

If the flag F_SIGN is cleared, the current AF pulse number is added to the defocus pulse number and stored in ISZ_FPX. If the flag F_SIGN is set, the defocus pulse number is calculated from the current AF pulse number. Subtract and store in ISZ_FPX (S765-S76
7). When the flag F_SIGN = 1, the defocus amount toward the FAR end side, and when the flag F_SIGN = 0, the defocus amount toward the NEAR end side. Then, the flag F_FPRE is set, a data input completion signal is output, the communication interrupt is permitted, and the process returns (S765 to S771). The defocus pulse thus sent by communication is used in the ISZ calculation routine for the calculation for obtaining the target focal length using the defocus pulse. Further, the flag F_FPRE is an instruction flag for performing calculation using the defocus amount.

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

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

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

FIG. 35 shows a flowchart relating to the processing when the STORE-PZF command is received. Upon receiving the STORE-PZF command, the lens CPU 61 inputs 2-byte data from the camera body 11, and if this is not an ISZ memory (flag F_
Lens RAM specified by bits FM0 to FM2 for the input 2-byte data if ISZM is not set)
Address of 61b (FCL0L, H to FCL7L, H)
If the ISZ memory (if F_ISZM is set), the input data is stored in the ISZ memory,
Flag F_IS that executes the ISZ calculation based on the focal length
Set up ZFOM (S791 to S796). Then, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S797 to S798).

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

Upon receiving the STORE-IS command, the lens CPU 61 outputs a command reception completion signal,
2 bytes of image magnification data is input from the camera body 11, and the data is stored in the image magnification memory (ISZ-IMG).
L, H) and set flag F_STIS (S8)
01-804). Then, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S805 to S).
806). The flag F_STIS is a flag for executing the calculation of the constant image magnification zoom ISZ based on the image magnification sent from the body side.

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

FIG. 37 is a flow chart showing the processing when the MOVE-PZMD command is received. When the lens CPU 61 inputs this MOVE-PZMD command, it outputs a command input completion signal,
Input 1-byte data from the camera body 11 (S
811 to S812). If the flag F_MDM in the input data is set, the address (FCL0L, H to FCL7L, H) specified by MVM0 to MVM2 is set.
Read data from PZP, convert it to PZ pulse data, store it in PZPTRGET of lens RAM 61b, and drive speed data (F_SPA, F_SPB of bits 6 and 7) to SPDDR.
Set to C2 and set flag F_MOVTRG, but flag F_
If the MDM is down, the upper 4 bits of the input data are stored in the address SPDDRC1 and the flag F_MOV is set (S813 to S819). These data are
Referenced in the 2ms timer interrupt routine, the power zoom of the specified operation is performed.

When the flags F_LBATREQ and F_IPZB are set, the data input completion signal is output, the communication interrupt is permitted, and the process returns (S820 to S820-2). In addition,
When the flag F_MDM (bit3) is set, it becomes a command for power zooming to the focal length stored in the specified memory.When the flag F_MDM is not set, it is instructed by the flags F_MDT and F_MDW (bit4,5). It becomes a command to power zoom in the direction. Flag F_MDT is TELE
Directional drive is designated, flag F_MDW designates WIDE direction drive, and flags F_SPA and F_SPB (bits 6 and 7) designate zooming speed.

FIG. 38 is a flow chart showing the processing when the MOVE-PZf command is received. When the MOVE-PZf command is input, the lens CPU 61 outputs a command reception completion signal, inputs 2-byte focal length data from the camera body 11, converts the input focal length data into PZ pulse data, and stores it in the lens RAM 61b. Store at address PZPTRGT,
Drive speed data is set in SPDDRC2, and flags F_BATREQ, F_IPZB, and F_MOVTRG are set. These data are referred to in the 2ms timer interrupt routine to execute the power zoom of the specified operation. Then, the data input completion signal is output, the communication interrupt is permitted, and then the process returns (S821 to S827).

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

First, interrupts are prohibited, data input by communication is stored in the address PZ_BDST, and the current distance code is input from the distance code plate 81 (S901 to S901).
905). If the flag F_ENDF for identifying the far end (infinity position) is set, it is checked whether the input distance code is the far end code (S907 to S909). If the distance code is the far end, the current AF pulse value and AF pulse count start value (addresses AFPXL, H, AFSTRTL,
(Contents of H) is cleared, and a flag F_AFPOS indicating that the AF pulse at the current position is known is set (S90
9, S913, S915). Further, if the flag F_NEARM for identifying the near move is cleared, CN
Jump to the TAFP10 process, and if standing, the driving direction changes, so jump to the CNTAFP11 process (S917). If the detected distance code is not the far end code, the far end flag F_ENDF is cleared and the process jumps to the CNTAFP3 process (S909, S911).

When the far end flag F_ENDF is cleared, the near end flag F_ENDN for identifying the near end (closest in-focus position) is checked, and if cleared, the routine proceeds to CNTAFP3 (S919). Near end flag F_
When ENDN is standing, it is checked whether the distance code is the code at the near end. If it is not the code at the near end, the far end flag F_ENDN is cleared and CNTAFP is set.
It progresses to 3 processing (S919-S923). When the distance code is near end, the current AF pulse count value and AF
Set the pulse count start value to the maximum value (N_AF
MAXL, H for AFPXL, H, AFSTRTL, H
The current AF pulse value is set and the flag F_AFPOS is set, and the firmware (F_AFPOS) is set.
It is checked whether or not FARM = 1), and if it is a firmware, the process proceeds to the CNTAFP11 process, and if it is not the firmware, the process proceeds to the CNTAFP10 process (S925 to S9).
29).

As described above, when the far end (F_ENDF = 1) or the near end (F_ENDN = 1), the count value of the AF pulse is corrected by a predetermined value. However, if the input distance code is judged and it is not at the end point, the end point correction is not performed.

Processing when the focusing lens group 53F is between the far end and the near end (CNTAFP3 processing)
This will be described with reference to the flowchart shown in FIG. First, the counter value of the current AF pulse hard counter is set to the AF pulse counter (AFPCNTL, H).
(S931, S933). If the flag F_FARM is cleared, proceed to CNTAFP6 processing,
When it is set, it is checked whether it was a near move last time (whether the flag F_NEARMOK is set) (S933, S935). When changing from near move to firm move, the AF pulse count start value (AFPSTRL, H) is added to the AF pulse count value (AFPCNTL, H) to obtain a predetermined current AF pulse value and AF pulse count start value memory AFP.
Memory in XL, H & AFSTRTL, H and CNTA
Proceed to the FP12 process (S935, S937).

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

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

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

The processing (the CNTAFP8 processing) when the AF motor 39 is stopped will be described with reference to the flowchart shown in FIG. In the CNTAFP8 process, it is first checked whether or not the previous move was near move (S961). If it was the near move last time, since it is a stop from the near move, the AF pulse count value (AFPSTRTL, H) is added to the AF pulse count value (A
FPCNTL, H) and add the sum to the current AF pulse value and AF pulse count start value (AFPXL,
H & AFPSTRTL, H) and store in CNTAFP
The process proceeds to step 10 (S961, S963). At the last time of the firmware, it is stopped from the firmware, so the AF pulse count start value (AFFPTRTL, H) is subtracted from the AF pulse count start value (AFPCNTL, H) to obtain the current AF pulse value and AF pulse count start value (AFPXL, (H & AFPSTRTL, H) and then proceeds to CNTAFP10 processing (S961, S9)
65, S967). If it is neither near move nor firm move last time, the process is stopped, so the process proceeds to the CNTAFP16 process (S961 and S965).

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

Since the CNTAFP11 process is started at the time of starting the AF drive, the LED of the AF pulsar 59 is turned on and A
F pulse hard counter and AF pulse count value memory (AFPCNTL, H) are cleared, and PZ_BDST
Memory content of PZ_BDST0, permit communication interruption, and exit AF pulse count processing (S97).
3, S975, S977, S979).

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

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

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

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

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

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

The lens CPU 61 uses the POFFS-WSL.
In the case of the EEP (12) command, the flag F_STNDBY is set, the command reception completion signal is output, and the switch (7
5, 77) is input (S1011 to S101)
5). When the flag F_STNDBY is set (when POFFS-WSLEEEP (12)), the electric / manual switch (D / M switch) is electric, and the tele switch or wide switch (speed switch) is used. When is on, the battery request flag F_BATREQ is set and the process proceeds to S1025, but otherwise the process proceeds to S1025 as it is (S1017, S01).
9, S1021, S1023).

When the flag F_STNDBY is set, normally, when this communication interrupt is ended and the process returns to the main routine, the mode shifts to the low power consumption mode.
Flag F_STNDBY if flag F_BATREQ is set
Even if is set, the mode does not shift to the low power consumption mode,
The normal operation can be continued, and the manual power zoom operation can be performed (see FIG. 7).

When the flag F_STNDBY is not set, the mode does not shift to the low power consumption mode even when returning to the main routine. Therefore, if the PZ speed switch 75 is turned on, the flag F_BATREQ is set in this command. Operations such as manual power zoom are possible without setting. When the flag F_STNDBY is cleared (POFF
-At the time of STATE (11)), S102 as it is.
Go to 5.

In S1025, the flags F_SLSW, F_ASSW, F_PZ are set according to the input zoom mode changeover switch 77.
Set or clear M, F_PZD, F_AFSW. Then, the state of the terminal VBATT is monitored and the camera body 1
If the power for the zoom motor 69 from 1 is not supplied, the flag F_BDET is cleared (VBATT off), and if it is supplied, the flag F_BDET is set (VBATT on) (S1027 to S1031). Then, the set 1-byte data (POFF-ST) is transferred to the camera body 11, a data input completion signal is output, a communication interrupt is permitted, and the process returns (S1033 to S103).
7).

At the time of POFF-STATE processing, S
The flag F_STNDBY setting process of 1011 is skipped and S10 is executed.
After entering 13, the same processing as the POFFS-WSLEEEP processing is executed thereafter.

[LENS-INF1 Processing] The flow chart of LENS-INF1 shown in FIG.
Is a process of sending the variable information of the above to the camera body 11.

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

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

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

The lens CPU 61 is a LENS-AFPU.
When the LSE command is input, a command reception completion signal is output, and when the current AF pulse is requested,
The current AF pulse number (AFPXL, H) is stored in a register (not shown) (S1061 to S1063). When a constant image magnification zoom (ISZ) pulse is required, ISZ AF pulse data (ISZ-AFP
L, H) are stored in the register (S1062, S10)
64, S1065). If none of them, the AF pulse data (AFP0L, H to A) of the designated address
FP7L, H) is stored in the register (S1062,
S1064, S1066). Then, the AF pulse data set in the register is output to the camera body 11, the data transmission completion signal is output, the communication interrupt is permitted, and the process returns (S1067 to S1069).

"FOCALLEN-X processing" lens 51
To output the focal length data of the camera to the camera body 11
The ALLEN-X processing will be described with reference to the flowchart shown in FIG. As I already explained, F
Be sure to use SET-P before communication of OCALLEN-X command.
Communication of the ZPOINT command is performed. This SET-
Depending on the contents of the PZPOINT command, FOCALL
It determines which focal length is sent to the body when an EN-X command is received.

The lens CPU 61 uses the FOCALLEN-
When the X command is received, a command reception completion signal is output, and when the current focal length is requested, the current focal length (FCLXL, H) is stored in the register (S1071 to S1073). Constant image magnification zoom (IS
When the focal length (ISZ-FCLL, H) of Z) is requested, the focal length data of the constant image magnification zoom is stored in the register (S1072, S1074, S10).
75). If neither is the case, the focal length (FCL0L, H to FCL7L, H) of the designated address is stored in the register (S1072, S1074, S107).
6). Then, the focal length data set in the register is output to the camera body 11, a data transmission completion signal is output, a communication interrupt is permitted, and the process returns (S1077-).
S1079).

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

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

[16-byte data processing] The 16-byte data flow chart shown in FIG. 51 is a processing for sending all 16-byte basic lens data to the camera body 11. Note that this command is the details of the processing in S221 of the communication interrupt routine of FIG. Each command is executed according to the contents under the command. It should be noted that the first half 8 byte processing and the second half 8 byte processing are 16 bytes.
e Details are omitted because it is similar to data communication.

When the 16-byte command is input, the lens CPU 61 outputs a command reception completion signal to the camera body 11, and 16 bytes of predetermined data (LC0-LC
15) is output to the camera body 11, a data transmission completion signal is output, a communication interrupt is permitted, and the process returns (S1).
091-S1095).

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

In this main flow processing, the main switch is turned on (when the battery is inserted and the power is turned on), etc.
When the main CPU 35 is reset, it enters first. In this process, first, the RAM 35b, port settings, etc. are initialized, predetermined information is input by switch input, E ² PROM data input, etc., and the power zoom initialization process (PZINIT subroutine) is executed (S1101, S1103, S1105). ). In the present embodiment, the power zoom initialization is a process for causing the PZ lens to perform an initialization process for detecting the zooming lens position, an initialization process for detecting the focusing lens position, and the like. The above is the process when the power is first turned on (when the main switch (not shown) is turned on). While the power is turned on, the next step (S110
7) The subsequent processing is repeated.

In step S1107, predetermined information is input, and if it is not locked (if the main switch is on), photographing is possible, so the procedure proceeds to predetermined processing. If it is unlocked (the main switch is off). If), S11
Proceed to the lock processing after 81 (S1109).

If the lock is unlocked for the first time, or if it is the first processing after the taking lens is mounted, the flag F_NEWCOM (old communication with the taking lens is completed and new The flag that stands when the communication starts) is cleared, and the PZ initialization flag F_PZIN
Clear IT and initialize the power zoom (S1109 to S1115, S1121, S112).
3).

If it is neither the first unlocking nor the first processing with the taking lens attached, it is the first AF mode, or if the first PZ mode is set, AF, P
In order to initialize various operations, data, etc. related to Z, a flag F_ that is set when these are initialized
PZINIT is cleared and the PZINIT subroutine is called (S1111, S1113, S1117 to S112).
3).

Next, after inputting the switch information, the processing concerning the power zoom (PZLOOP subroutine) is executed, a predetermined display is performed on the display panel 45, and S11 is executed.
It progresses to 33 (S1127-S1131). In the photometric switch SWS (AF switch) check in S1133, if the photometric switch SWS is off, the photometric IC,
The power supply Vdd of the CCD, the E ² PROM and part of the peripheral control circuit is turned off (S1133, S1135). Then, if the in-AF flag F_AF is cleared, the process returns from START, and if the in-AF flag F_AF is set, S1165.
Proceed to (S1136).

If the in-AF flag F_AF is set, AF and the related constant image magnification zoom process may be performed before the photometric switch SWS is turned off.
The constant image magnification zoom stop flag F_ISZSTOP is set, and the constant image magnification zoom stop and stop check processing (I
Execute the PZENDCHECK subroutine) (S1)
136, S1165, S1167).

Next, the focus flag F_INFOCUS is cleared and A
F motor stop processing is performed, AF drive information and the like is sent to the power zoom lens 51 by PZ-BSTATE command communication, the AF flag F_AF is cleared, and the process proceeds to S1176 (S1169, S1171, S1173, S117).
5).

When checking S1133, the photometric switch S
If WS is turned on, the terminal Vdd is turned on (a constant voltage is applied), photometry and calculation regarding exposure are performed, and the result is displayed (S1137, S1138). And AF
If it is not the mode, the process jumps from S1165 (S11).
39, S1165). In the AF mode, the in-AF flag F_AF is set, the distance measurement process, that is, the integration is started,
The integrated data is fetched and a predetermined predictor calculation is executed (S1139, S1140, S1143).

When the predictor calculation result is valid, it is determined whether or not focus is achieved, and when focus is achieved, focus processing is performed (S1145, S1149, S1151). When out of focus, if it is not a power zoom lens (F_PZ
(When = 0), the process jumps to S1176, but if it is the power zoom, AF drive information and the like are transmitted to the power zoom lens 51 by the PZ-BSTATE command, the AF motor 39 is activated, and then the process proceeds to the moving body process of S1159. (S114
5, S1149, S1153 to S1157).

When the predictor calculation result is not within the effective range, for example, when the contrast of the subject is too low, a search process for obtaining an effective value is performed, and then S115.
3 (S1145, S1147). The search process is a process for obtaining an effective defocus value by performing integration while driving the AF motor 39 toward the short distance side or the long distance side.

When the focusing process of S1157 is completed or the AF motor drive of S1157 is completed, if the subject is a moving object, the moving object following AF process is performed (S1159). In the constant image magnification zoom mode, the constant image magnification zoom process is performed, and then the release switch SWR check process (S1176) is performed (S11).
59-S1163).

In S1176, it is checked whether or not the release switch SWR is turned on. If it is turned off, the process returns to the start as it is, and if it is turned on, release processing is performed on condition that the release is permitted and the start is started. Return (S1176, S1178, S117
9).

[0215] If the lock is checked at the time of checking S1109 (when the main switch is off), S11
Proceed to 81. When this lock is the first lock and power zoom in this routine, the process proceeds to a save process (S1183) to save the focal length data stored in the preset zoom set mode to the camera body, but otherwise, to S1223. Fly (S118
1, S1183). When it is not the first lock or when the taking lens is not the power zoom, constant voltage supply (CONT) and power supply (VBAT) to the taking lens
T) is turned off, the display of the display 45 is turned off, and the process returns to the start (S1181, S1183, S1223 to S122).
7).

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

At S1195 and S1197, LENS-
Based on the data input in INF2, check whether the power zoom can be stored or not. When the power zoom cannot be stored, or when the power zoom is not performed, the process proceeds to CONT1 as it is. When the power zoom can be stored and the power zoom is (retPZ = 1, PZD = 1), the body side requests the battery to perform a battery check, When it is normal, the command (RETRACT) for causing the power zoom lens 51 to perform the power zoom storing process.
-PZ) is transmitted, a flag F_IPZON for identifying that the control zoom is being performed is set, the NG timer is started, and the process proceeds to the CONT1 process (S1195 to S1209). If the battery is abnormal in the battery check, the process proceeds to CONT1 processing (S1203). Note that the flag re
tPZ is information specific to the lens, and is cleared when the zoom lens does not require storage of the zooming lens due to inner zoom or the like, and storage processing is not performed.

In the CONT1 process, it is determined whether the power zoom lens 51 can be stored in the AF or the AF mode by LENS-INF.
It is checked by the AF storage flag RETAF or the like input by 2 and if the AF storage is possible and the AF mode is set, the AF motor 39 is driven to return the focusing lens 53F to the storage position (fur end) (S1211 to S1215). Then, if the control power zoom is in progress, the control power zoom is checked while waiting, and when it is finished, the constant voltage supply and the power supply to the photographing lens are turned off, and the display of the display unit 45 is turned off to start. Return to (S1217 ~
S1227). If the AF cannot be stored or the AF mode is not set, the lens storing process is skipped. The flag RE
TAF is information unique to the lens, and it is cleared when the zoom lens does not need to store the focusing lens due to inner focus etc., and the storage process is not performed.

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

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

If the attached photographing lens is not the Kz lens (including the power zoom lens 51 of this embodiment) equipped with the lens CPU, new communication is not possible, and the process returns. New communication L
Data is input by the ENS-INF2 (14) and it is checked whether or not it is a power zoom lens (PZ lens) (S1305, S1309). If it is not a PZ lens,
The flag F_PZ for identifying the PZ lens is cleared and the process proceeds to S1323 (S1309, S1311).

If it is a PZ lens, the flag F_PZ is set, and when it comes from reset (batteries are replaced) or when the lens is mounted for the first time, the initial value is stored in the image magnification (image size) memory ISZ ( S1
313, S1315, S1319). Otherwise, S
Through the TORE-PZF (28) communication, the focal length information for the preset zoom etc. saved in the address FML of the body RAM 35b in S1185,
The lens RAM 61b of the lens CPU 61 is made to store in a predetermined address (FCL0L, H to FCL7L, H) (S1315, S1317). And STORE-I
S (29) communication is performed, and the RAM (35
The image magnification saved in b) or the image magnification of the initial value set in S1319 is used as the RAM of the lens CPU (61b).
To a predetermined address (ISZ-IMGL, H) of the memory and set a new communication flag (S1321, S132).
3).

Next, data is input from the lens CPU 61 by POFF-STATE (11) communication (S13).
25). Is the flag F_PZINIT indicating the completion of power zoom initialization set,
If the flag F_PZ indicating the power zoom is cleared, the process jumps to S1361 where the standby process is performed (S1327, S1329).

If the flag PZINIT is cleared and the flag F_PZ is set, the power zoom is not performed (flag F_PZD (POFF-STATE data bit
When (5) is cleared), that is, during manual zooming, the process directly proceeds to AF initialization (AFINIT) processing (S1325-S1331). In the power zoom mode, a flag F_BBATREQ is set by the body to turn on the power of the PZ, the power of the PZ is turned on in the BATONOFF subroutine to supply power to the power zoom lens 51, and whether power is normally supplied. Check (S1131 to S1137). If the battery power is not output normally (flag F_
If BATNG = 1), proceed to AFINIT processing as it is. If normal (F_BATNG = 0), PZ-IN
The ITPOS command (32) is output to cause the taking lens to perform the PZ initialization operation, and the flag F_PZINIT indicating that the initialization of the PZ is completed is set to AF.
Proceed to the INIT processing (S1337 to S1341).

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

In the AFINIT processing, the taking lens is set to the AF
Focusing lens 53, provided that it is in the mode
F is moved to the storage position, that is, the position where the lens barrel length is the shortest (S1341, S1343). In the present embodiment, the position is infinity. Then, the initialization data is input by AFINITPOS communication, and the flag F_AFINI is input.
Set T (S1345, S1347). Further, in this initialization, the lens CPU 61 initializes the lens RAM 61b for counting AF pulses.

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

The photometric IC 17 and CC of the body 11
If the power of D21, E ² PROM 43, etc. is on (Vdd ON), it returns as it is, and if it is off, STAN
The lens CP of the photographing lens 51 by transmitting the DBY command
The U61 is set to the standby (shift to the low power consumption mode) and then the process returns (S1361, S1363).

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

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

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

[0232] Then, the battery supply is normal (POFF-
If the STATE bit 0 flag F_BDET = 1), the process directly returns (S1417). However, when the power supply is abnormal, for example, when it is short-circuited with the GND line, a flag F_BATNG for identifying that the battery is abnormal is set, the power supply to the power zoom lens 51 is stopped, and the flag F_BATON is set. Is cleared, the BODY-STATE0 command is output, the power supply stop data is sent to the lens 51, and the process returns (S1419 to S1425).

[PZ-LOOP processing] FIGS. 60A and 60B.
61 and the PZ-LOOP process shown in FIG.
A process relating to the power zoom performed by the PU 35,
It is executed intermittently. In this process, power zoom related, preset zoom for power zooming up to a preset focal length, focal length preset, constant image magnification zoom control, and the like are performed. In this embodiment, in the preset zoom set (PSZS) mode, the SL switch (P
When the Z mode switch 77) is turned on, the current focal length is memorized. In the preset zoom (PSZ) mode, power zoom is performed up to the preset focal length when the SL switch is turned on. Then, when the SL switch is turned off or the zoom operation ring is returned to the neutral position (when the PZ speed switch 75 is turned off), the image magnification at that time is stored.

Upon entering this processing, on the condition that new communication and power zooming are possible, the flow advances to S1505 to execute each processing, but if new communication is not possible, the processing directly returns. Also, when new communication is possible and power zoom is not possible,
Perform BODY-STATE0 communication (S1501, S
1503, S1504-1). This BODY-STAT
In E0 communication, body side information such as power zoom mode information is sent to the lens, and when Vdd is on,
Lens information such as a switch state on the lens side is input by POFF-STATE communication (S1504-2, S1504).
-3). When Vdd is off, POFFS-WSLEE
Lens information is input via P communication and the lens CPU6
1 is shifted to the standby mode (low power consumption mode) (S1504-2, S1504-4). This POFF
With the S-WSLEEEP command, the lens CPU 61
The low power consumption mode is maintained until the next communication command is received.

In step S1505, the power zoom lens 51
From POFF-STATE, the data of the lens switch and the like is input, the PZ mode is switched and the display is corrected according to the data, and power is supplied or stopped (S1503 to S1509). Then, the following processing is performed based on the input data (S1509 to S1).
511).

In the preset zoom (PSZ) mode, the operation of constant image magnification zoom is prohibited (flag F_IS
Zstop is set), and the constant image magnification zoom is ended in the IPZENDCHECK subroutine (S1513).
~ S1517). If preset zoom drive is not started (SL switch is on), the process returns (S1519).
If the preset zoom drive is started and the preset zoom drive is currently in progress (F_IPZON = 1), IPZEND
In the check subroutine, a process of checking whether or not the preset zoom is finished is executed, and when it is finished, the process returns (S1519, S1521, S1555).

If the preset zoom drive is not in progress, the camera body 11 itself requests power supply, and power supply is performed (S1521 to S1525). If the battery is abnormal, the process returns as it is, and if normal, the MOVE
-A flag F_IPZO that sends a PZND command to cause power zoom to the focal length position stored in the specified address and identify that preset zoom is in progress
N is set up and it returns (S1527-S1531).

In the preset zoom set (PSZS) mode, flags (F_ISZSTOP, F_IPZSTOP) for stopping the driving of the preset zoom and constant image magnification control
And the driving of the preset zoom or the constant image magnification zoom is stopped in the IPZENDCHECK subroutine (S1513, S1541, S1543, S15).
45).

When the SL switch is turned on, a STORE-PZP command is transmitted to the power zoom lens 51 to cause the lens CPU 61 to store the current focal length data at the specified address of the lens RAM 61b, and the preset zoom is performed. The power zoom lens 51 indicates that the set (PSZS) mode is changed to the preset zoom (PSZ) mode, the values of bits 0 to 2 in the BODYSTATE0 command are changed, and the BODYSTATE0 command is output to change to the preset zoom mode. And then return (S1547 to S1553). When the SL switch remains off, the process returns without doing anything (S154).
7).

In the constant image magnification zoom mode, the preset zoom is stopped and it is checked that the preset zoom is completed (S1541, S1561, S15).
63, S1565). Here, when the SL switch is pressed, a flag F_PZWAIT for prohibiting the start of the constant image magnification zoom is set and the process returns (S156).
7, S1577). When the SL switch is off, L
If the ENS-INF1 data is input and the zoom switch (zoom speed switch 75) is turned on, a flag F_PZ for prohibiting the start of the constant image magnification zoom
Set WAIT and return (S1567, S157
7). When the zoom speed changeover switch 75 is at the neutral point (when it is off), the flag F_PZWAIT is cleared and it is checked whether or not it is in focus. If it is out of focus, the process directly returns (S1571 to S157).
5). When in focus, when the SL switch is turned off, or when the zoom speed changeover switch 75 is returned to the neutral point (when it is off), the ISZ-MEMORY command for storing the image magnification at that time is stored in the photographing lens. To return, and if neither of the above is the case, the process directly returns (S1579 to S1583).

When not in any of the above modes,
Stop preset zoom and constant image magnification zoom,
It is checked that the preset zoom is completed and the process returns (S1513, S1541, S1561, S15).
85-S1587).

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

Upon entering this IPZENDCHECK subroutine, when the image magnification constant zoom stop and the image magnification constant zoom operation are in progress (F_ISZSTOP = 1, F_ISZON = 1), or when the preset zoom stop and preset zoom operation are in progress (F_IPZSTOP = 1, F_IPZON = 1), N
The GTIMER flag and the IPZEND flag are cleared, the IPZ-STOP command for stopping the power zoom is transmitted, each flag F_ISZON, F_IPZON, BBATreq is cleared, and the battery supply is stopped and checked before returning (S1601 to S1607, S1623).
~ S1631).

When neither the constant image magnification zoom nor the preset zoom is being performed, the PZ-LSTATE data is input, and it is checked whether the power zoom lens 51 is performing the preset zoom or the constant image magnification zooming. If not (when IPZB = 0), preset zoom or constant image magnification zoom end flags F_IPZSTOP and F_ISZSTOP are set and the process returns (S1601 to S1617). During preset zoom or during constant image magnification zoom (when IPZB = 1), the process returns if the abnormality detection timer (NG timer) has not timed up (S1619).

When the NG (abnormality detection) timer times up before the constant image magnification zoom is completed, it is considered that there was some abnormality, so the TIMEUP flag is set (F_TIMEUP = 1) and the NGTIMER flag and IPZEND flag are cleared. (F_NGTIMER = 0, F_IP
ZEND = 0) (S1622-1, S1622-2).
Then, the power zoom stop processing is performed (S1623-).
S1631). When the NG timer has not timed out, it returns as it is.

[ISZ-DRIVE1 Processing] The flow chart (ISZ-DRIVE1) shown in FIGS. 63 to 66.
1) is a power zoom lens 51 (lens CPU 61)
Body CPU 31 for controlling the constant image magnification zoom process
Processing.

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

When the power zoom weight (F_PZWAIT = 1) or when the predictor calculation result is invalid, the process returns without doing anything (S1709, S1711). If it is not the power zoom weight and the predictor calculation result is valid, it is checked whether or not it is in focus (S1709 to S1713). When in focus, it is checked whether the NG timer is already activated (F_NGTIMER = 1). If not activated, the NG timer is started, the flag F_NGTIMER is set, and the process proceeds to S1721 (S1713, S1715,
S1719, S1720). If the NG timer has already been activated, the above processing is skipped and the process proceeds to S1721.

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

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

If in focus, in order to execute a constant image magnification zoom based on the current AF pulse number (lens extension amount), predetermined data is transmitted to the power zoom lens 51 by the BODY-STATE1 command, Further ISZ
-Power zoom lens 5 by sending the START command
The constant image magnification zoom is started to 1 and then the process returns (S1741 to S1745). If it is out of focus, the data of the defocus pulse measured by the camera body 11 is transmitted by the STORE-DEF & D command, and the data for performing the constant image magnification zoom based on the defocus pulse is transmitted by the BODY-STATE1 command. Send,
The ISZ-START command is transmitted and the process returns (S1741, S1747 to S1751). The lens CPU 61 that has received the above commands and data calculates the target focal length through the ISZ processing of FIG. 15 and executes zooming control.

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

The processes of steps S1801 to S1823 are the same as those of S1701 to S17 of the first embodiment shown in FIG.
Since it is similar to 31, the description up to that is omitted and S18
The processing after 25 will be described. When it is not in the focused state, the data regarding the power zoom state of the camera body 11 is transmitted by the PZ-BSTATE command (S18).
13, S1825-S1833). If the power zoom lens 51 is not zooming at a constant image magnification, the body side makes a power request to supply a battery and check, and the control zoom in-progress flag F_IPZON is set (S).
1827-S1833).

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

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

In the above embodiment, the calculation method of the target focal length is changed according to the focusing state of the taking lens, but of course, other conditions, such as the moving object prediction A
The configuration may be changed based on whether it is F or not.
In this case, before S1853, a determination process of “is the subject a moving body?” Is added, and if it is a moving body, the target focal length is calculated by the current lens extension amount in S1851, and if it is not a moving body, in S1853. The focal length may be calculated. Here, the reason for calculating the target focal length without using the defocus amount during the moving object predictive AF is to speed up and stabilize the lens drive.

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

If the focusing lens 53F is at the infinity position, the AF-INITPOS command is transmitted to the power zoom lens 51 (S1901, S1903). If it is at the closest position, the power on the camera body 11 side is sent by the PZ-BSTATE command. The PZ body state data regarding the zoom mode is transmitted to the power zoom lens 51 (S1901, S1905, S1907). When the power zoom weight is used, or when the predictor calculation result is invalid, the process returns without doing anything (S1909,
S1911).

When the power zoom weight is not used and the predictor calculation result is valid, it is checked whether or not the subject is a moving body (S1909 to S1913). When the object is a moving object and the constant image magnification zooming flag is down (when constant image magnification zoom driving is not in progress), the battery request flag of the body is set (F_BATREQ = 1) to supply the battery, The constant magnification zoom flag (F_ISZON = 1) is set (S1961 to S196).
7). And moving speed of moving object (moving speed of image plane)
Set the power zoom speed according to, and set the power zoom speed data (ISSPA, ISSP
B) and clear the flag F_ISZD so that the ISZ control is performed by the AF pulse at the current position, and BODY-STA
It is sent by TE1 data communication, and an ISZ-START command is sent to cause the taking lens 51 to start zooming with a constant image magnification (S1969 to S1973).

If it is not a moving object, the second focus (F_INFOCUS
= 2) or the first time (F_INFOCUS = 1) is checked (S1913, S1915, S1917). Note that F_INFOCUS has 2 bits. If it is neither the second nor the first focus, that is, at the beginning, it is checked whether or not it is in focus, and if it is not in focus, it returns. If it is in focus, the battery request flag BBAT of the body
Power is supplied by setting REQ, and a flag F_ISZON during constant image magnification zooming is set (S1919 to S192).
5).

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

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

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

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

In the AFP-CNT process, first, the count value of the AF pulse hard counter is stored in the AF pulse count value memory (address AFPCCNTL of the lens RAM 61b,
H) is stored (S2001). And PZ-BS
Data relating to autofocus control input by the TATE command (predetermined address P of the lens RAM 61b
Data of bit 3 to bit 0 of Z_BDST),
When the AF motor 39 is near moving and has not reached the near end, the AF pulse count value is added to the AF pulse count start value (AFPSTRTL, H), and this is added to the current AF pulse value memory (lens RAM).
The routine exits from this routine by storing in AFPXL, H of 61b), but terminates as it is when the near end is reached (S2002 to S2007).

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

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

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

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

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

Then, the above-mentioned difference is the predetermined allowable error (N_AFPD
IF), it is checked if it is larger, and if it is smaller, the processing is terminated as it is, but if it is larger, correction,
That is, the current AF pulse value memory (AFPXL, H) and AF pulse count start value memory (AFPST
The table data (AFPCDL, H) is put into RTL, H) (S2043, S2045). On the other hand, when the current value of the AF pulse is not known, the above S20 is unconditionally performed.
The correction process of 45 is executed (S2035, S204
5).

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

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

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

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

When the counter T_START becomes 0, it means that a certain period has elapsed since the motor was started.
The process proceeds to the subsequent end point detection processing. PWM duty ratio T
_PWMBRK is the maximum limit value N of the PWM duty ratio
If it is equal to or more than _PWMMAX, the end point detection counter T_LMT is incremented by 1 and the process proceeds to S2073. If not, the process directly proceeds to S2073 (S2073).
2065, S2067). When the motor is DC driven (highest speed drive), the duty ratio T_PWMBR
Since the value of the maximum limit value N_PWMMAX is set as K, the limit counter T_LMT is incremented during DC driving (S2065, S2067).

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

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

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

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

First, the power request flag F_BATREQ is set, the position of the zoom speed changeover switch 75 is converted into a predetermined code (code indicating direction and speed), and the converted value memory TRNSSPD is stored (S2101, S21).
03).

Driving to a designated position (F_MOVTARG =
If it is 1), it proceeds to MOV_TRG processing, and if it is a normal drive in the designated direction (when F_MOV is set), it proceeds to MOV processing (S2105, S210).
7).

If neither drive is performed, the zoom operation ring is in the neutral position (zoom switch 75 is off), and the image magnification constant zoom mode is set, the process proceeds to the MOV-TARG processing, and if it is not the image magnification constant zoom mode. NO-MO
The process proceeds to V processing (S2109, S2115). When the zoom operation ring is not in the neutral position, the process proceeds to NO-MOV processing when the manual power zoom stop bit is set (F_MPZD = 1), and when it is not the manual power zoom, the zoom speed converted from the zoom switch state is used. Address the data SPDDRC
The data is stored in memory 1 and the process proceeds to MOV processing (S2109, S2
111, S2113).

In the above processing, when the body enters the release processing, the communication command BODY-ATAT
Since the flag F_MPZD is set at E1 (22), the manual power zoom operation during release can be stopped. Further, when the communication command IPZ-STOP (35) for stopping the power zoom is sent, the flags F_MOVTRG, F_MOV, F_ISZ, etc. are cleared, so that the power zoom operation other than the manual power zoom can also be stopped. ..

[MOV Processing] Next, control of the power zoom motor will be described with reference to the MOV flowcharts shown in FIGS. 73 to 75. This control is manual zoom and power zoom control in the specified direction (flag F_MO
This is the processing in the body power lens 51 regarding (when V is set). First, tele direction drive (F_TE
It is checked whether LE1 = 1) (bit 0 of drive direction memory SPDDRC1) (S2201).

When the driving direction is the tele direction and the tele end or the pseudo tele end is reached, the process proceeds to NO-MOV processing (S2201 to S2205). First drive (startup)
In the case of, the process proceeds to the processing for initial setting S2233 (S2207). Then, the zoom motor control memory Z
When the drive direction (zoom motor rotation direction) changes from the previous time, although it was driven last time by referring to the data related to the previous zoom motor control set in M_BDST (F_
DRCW = 1), or when the power supply from the body 11 is turned off, the process proceeds to a brake process (BRK1) (S22).
07-S2211). When the same direction drive was performed last time and the electric power is supplied, the process proceeds to the speed setting process of S2249 (S2207 to S2211).

When the driving direction is not the tele direction but reaches the wide end or the pseudo wide end (F_WEND = 1 or F_WEND)
If LMTW = 1, proceed to NO-MOV processing (S2201,
S2223, S2225). If the drive has not reached the wide end or the pseudo wide end but has started, the process proceeds to step S2233 for initialization, and the drive has been performed the previous time, but when the drive direction changes from the previous time or the power supply from the body is turned off. If so, proceed to the brake processing (BRK1),
When the same direction driving was performed last time and the electric power is supplied, the process proceeds to the speed setting process of S2249 (S22).
25-S2231).

The initial setting process at startup is executed on condition that the power is supplied, and if the power is not supplied, the process proceeds to the stop process (NO-MOV1) (S2233).
When power is supplied, the brake flag F_B
When RK is set (when the motor is braking), the brake counter T_BRK is incremented by 1, and the brake counter T_BRK is set to a predetermined value (N_B
In the case of RKREV or less, the process proceeds to the brake 2 (BRK2) process for the brake process (S2235 to S223).
9).

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

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

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

When the speed setting is completed, the speed and its direction (SPDDRC1) are stored in the zoom control memory (ZM_ST1), and the drive flag F_DRV is set.
Is set and the brake flag F_BRK is cleared (S2251). The bits 3 to 0 of ZM_ST1 (flags SPDB1, SPDA1, WIDE1, and TELE1) are set respectively. Further, the tele end and wide end pseudo flags F_LIMTT and LIMTW are cleared, and the drive direction flags F_TMOV, F_WMOV, F_TELE1 and F
_WIDE1 set, tele end, wide end flag F_
Clear TEND and F_WEND (S2253 to S
2257). The flags F_TMOV, F_WMO
V, F_TEND and F_WEND are PZ-LST
It is a flag of data, and flags F_TMOV and F_WM
OV is a flag F_TELE1, FW of SPDDRC1
It is set in correspondence with IDE1. The flags F_TMOV and F_WMOV are cleared (= 0) when one of them is set (= 1).

If the constant image magnification zoom is in effect, the manual power zoom is performed by interrupting during the constant image magnification zoom. Therefore, the memory data (P
Z_LST) the predetermined flags F_TMOV, F_W
MOV, F_TEND, F_WEND, etc. are set and the process ends (S2259, S2267). If the power zoom is performed by operating the zoom switch (manual power zoom) when the image magnification constant zoom is not being performed, the data including the flag F_MPZ regarding the manual power zoom is put in the zoom state data (PZ-LST), and the control power zoom (specified Zoom in the direction), the data including the flag F_IPZB related to the control power zoom is put in the zoom state data (PZ-LST) and SET-ST is set.
The process ends (S2261 to S2265). Note that P
The content of the Z_LST data is the command PZ-LSTAT.
It is sent to the camera body 11 by communication relating to E (10).

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

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

[BRK1, 2 Processing] In the brake processing (BRK1) of FIG. 78, the brake timer T_BRK is cleared and the tele direction flag F_DRCT and wide direction flag F_DRC are set.
W, speed 1 flag F_SPD0, speed 2 flag F_SPD1
And the drive flag F_DRV are cleared, and the brake flag F
_BRK is set (S2311, S2313). B
Since RK2 is entered for the second time and thereafter, only the processing of S2313 is performed. After performing the above processing, the SET-ST processing is ended.

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

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

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

In S2349, it is checked whether or not the constant image magnification zoom is in progress, and in S2351, it is checked whether or not the constant image magnification zoom calculation is completed. When the image magnification is constant zoom and the calculation is not completed, PZ_
Flags F_TEND, F_WEND in LST data,
F_IPZB, F_ISZOK are left as they are, and other flags F_TMOV, F_WMOV, F_IPZI, F
_MPZ is cleared (S2353). When the constant image magnification zoom is not being performed, or when the calculation is completed even during the constant image magnification zoom, the flag F in the PZ_LST data is set.
Other flags are cleared while leaving _TEND and F_WEND unchanged (S2355). The contents of the PZ_LST data are sent to the camera body 11 by communication of the command PZ-LSTATE (10). Note that the flag F_PZDR
C is the flag F_DRCW, F_DR in the ZM_ST1 data
It has the same function as CT, and when F_PZDRC = 1, it means wide-direction drive.

Then, the logical sum of the ZM-ST2 data and the predetermined data is stored in ZM-ST2, and the start flag F_START, the constant image magnification zoom flag F_ISZ, the designated direction drive flag F_MOVTARG, and the designated position drive flag F_MO are stored.
VPLS, F_MOVZC, etc. are cleared and the SET-ST processing is ended (S2357). That is, the flags F_PZPOS and F_PZPDRC in the ZM-ST2 data are left as they are and the other flags are cleared.

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

When driving in the tele direction, the target pulse number (PZPTRGT) is subtracted from the current pulse number (PZPX) and the difference is used as the drive pulse number in the memory (PZPD).
IF) (S2403). If the target pulse number and the current pulse number are equal, it is not necessary to drive, so NO-MO
The process proceeds to V processing (S2405). If they are not equal, the motor drive direction is provisionally set to the tele direction, and if it is the tele end or the pseudo tele end, the process proceeds to NO-MOV processing (S2407 to S24).
11). If the wide direction flag F_DRCW is set or the battery is off when the vehicle is being driven without being at the tele end or the pseudo tele end, the process proceeds to BRK1 processing (S2).
413-S2417). When driving in the same direction and the battery is supplied, the process proceeds to the DRV-TRG8 process (S2413 to S2417). S when not driving
Proceed to 2441.

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

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

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

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

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

[0309] When the setting is completed, the PZ pulsar 69 L
Turn on the ED to prepare for PZ pulse counting, and
If the pulse interrupt is not permitted, permit it and then proceed to the DRV-TRG8 processing (S2453 to S245).
7).

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

First, the process proceeds to speed selection processing according to the set zoom speed (S2501). That is,
When the first speed is set, the process proceeds to S2503, when the second speed is set, the process proceeds to S2511, and the third speed is set.
When the speed is set, the flow proceeds to S2521, and when the fourth speed is selected, the flow proceeds to S2541. Note that the speed selection is bit 2, 3 (F_
SPDA2, F_SPDB2).
The SPDDRC2 is used when the target position is set, and stores the zoom direction at the start of driving the zoom lens and the zoom speed automatically set by the main CPU 35 or the lens CPU 61.

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

When the second speed is set, it is checked whether the pulse number to the target (PZPDIF) is equal to or more than the first pulse number. If it is smaller, DRVPWM0 (1
Proceed to S2503). If so, the process proceeds to step S2513, and the speed and direction (ZM
-The value of ST1) does not change, and if there is a change, the PWM brake timer (PWM duty ratio) is set to the second speed reference value N_PWMMI1, and if there is no change, T -Set the cycle N_PWMP1 of the PZ pulse of the second speed to PWMPLS and set R_I
The logical sum of the NT data and the predetermined data is put into ZM-ST1 and the process proceeds to S2551 (S2503 to S2509). The second speed is set by the above processing.

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

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

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

When the PZ pulse is corrected when the zooming lens group 53Z is at the wide end (F_PZPAD
(When J = 0), the current PZ pulse value and PZ pulse count start value are reset to 0, and if the flag F_PZPOS indicating whether the current position is known is set, the process proceeds to PZP-CNT5 processing. If the position flag is cleared, power zoom initialization (PZ-
INIT) processing (S2601 to S2605, S2)
615). If not corrected, the current position is OK (POS) when the current position is known (when F_PZPOS = 1).
If the current position is unknown ((F_PZPOS = 0)), the current position is unknown (POS-
The process proceeds to NG) processing (S2603, S2607).

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

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

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

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

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

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

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

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

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

When there is borrow in the subtraction value, there is some erroneous count, so the target PZ pulse number is set to 0 to clear the drive flag F_MOV, and when there is no borrow, the move flag is cleared as it is (S2639, S26).
2641). Then, the target value move flag (F_MOV
TRG) and set PZ speed to 1st speed (lowest speed)
Set the current position flag to PZP-CN
The process proceeds to T5 processing (S2643 to S2649). Note that P
When coming from the Z-INIT processing, this processing is entered from S2633.

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

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

When coming from DRIVSTART1, S
At step 2659, the start flag is cleared and the driving direction is set (S2659 to S266).
5).

[PZP-ADJ, PZP-CNT5 Processing] The PZP-ADJ processing shown in FIG. 89 is processing for correcting the cumulative error of the count value of the PZ pulse. First, check if the zoom code is the same as the last time, and if it is the same, it cannot be corrected, so exit from the PZP-CNT processing.
If they are different, the correction process is continued under the condition that the PZP correction prohibition flag F_PZDADJ is cleared. In other words, it waits until it exceeds the divided area (boundary) of the code plate 71. The PZP correction prohibition flag F_PZDAD
J is for testing and is normally cleared.

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

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

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

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

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

In the ISZMEMO processing, the memory processing after S2707 is carried out on condition that the image magnification lens memory flag F_ISM is set, the constant image magnification mode is selected, and the focusing flag F_AFIN is set (S27).
01-S2705). Image magnification lens memory flag F_I
The SM is sent from the body by the command PZ-BSTATE (20) and stored in the PZ-BDST.

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

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

When the zoom switch 75 is returned to the neutral position this time, not the neutral position last time, even if it is not, when the set switch was turned on last time but turned off this time,
The current value of the AF pulse is stored in the address ISZ-AFPL, H, and the current focal length is stored in the address ISZ-F.
Image magnification calculation instruction flag F_IS stored in CLL and H
After setting M, the ISZMEMO process ends (S
2707-S2719). That is, the focus is achieved and the flag F
If _ISM is set, the image magnification at that time is stored when the zoom switch 75 is returned from the tele or wide direction to the neutral position or when the set switch is turned off. It is a composition.

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

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

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

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

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

[Release Processing] The release processing in the camera body 11 shown in FIG. 92 will be described. This release process is executed by the main CPU 35 on condition that the release switch SWR is turned on.

Whether or not the manual power zoom during exposure is possible is determined based on the data stored in the E ² PROM or the like, and the BODY-STATE is determined according to this determination.
Send predetermined data to the lens in one communication (S2901, S
2903, S2905). When the manual power zoom is possible during exposure, the MPZ prohibition flag (MPZD) is cleared, the control zoom stop flag (IPZD) is set, and the releasing flag (REL) is set.
ATE1 data is sent (S2905). When manual power zoom is not possible during exposure, MPZ prohibit flag (MP
ZD) is set and the control zoom stop flag (IPZD)
Is set, and the BODY-STATE1 data with the release flag (REL) set is sent (S2903).
If the control zoom (constant image magnification zoom or preset zoom) is operating through these communications, the control zoom is stopped.

Next, the PZ_LSTATE command communication is performed to check the flag F_IPZB to check whether the control zoom (constant image magnification zoom or preset zoom) is completed (S2904-1 and S2904-1). When the process is completed, the constant image magnification zoom flag F_ISZON and the preset zoom flag F_IPZON are cleared, the battery request flag of the body is cleared, and the battery supply is stopped (S2904-3 to 6).

Next, the mirror motor 33 and the diaphragm mechanism 4
6 is started, the mirror 13 is moved up and the aperture is narrowed down, and when these processes are completed, the front curtain of the exposure mechanism 27 is made to travel and it is checked whether or not it is zoom during exposure (S2907, S2909, S2911). If it is the zoom between exposures, the processes of S2913 to S2923 are executed.

[Exposure Zoom] The exposure zoom operation will be described with reference to the timing chart shown in FIG. In the case of the zoom between exposures, the zooming speed according to the exposure time is set on condition that the exposure time (shutter speed) is longer than the predetermined time (for example, 1/60 seconds), and the power zoom direction (TELE direction or WI
(DE direction) is set, power is supplied to the power zoom lens 51, it is checked whether power is normally supplied, and if the power is normally supplied, the exposure time is set to 1
Wait for / 2 to elapse (S2911, S2913 to S2913-S)
2923).

When 1/2 of the exposure time has passed, S291
5, the data of the zooming speed and the direction set in S2917 are transmitted to the power zoom lens 51 by MOVE-PZMD command communication, and the power zoom lens 51
Then, the power zoom is started to wait for the exposure time to elapse (S2923 to S2927).

When the exposure time has elapsed (the trailing curtain has finished running), BODY-STATE1 communication is performed, manual power zooming is prohibited, and zooming during exposure is stopped (S2929). Next, the flag IPZB is checked by PZ-LSTATE data communication to check whether the zooming during the exposure is stopped (S2929 to S2).
931). When the stop (IPZB = 0) is confirmed, the battery request flag of the body is cleared and the battery supply is stopped (S2931 to S2933). Then, the mirror motor 33 and the film winding motor 25 are activated to perform the mirror down and the film winding, and the BODY-
The STATE1 communication is performed, the manual power zoom is permitted, and the process returns (S2934 to S2937).

As described above, in the present embodiment, the exposure time for performing the inter-exposure zoom is set to 1/60 seconds or more, but is not limited to this.
Although the zoom speed is changed according to the exposure time, it may not be changed, and the power zoom is started after the 1/2 exposure time has elapsed, but the start and end timings of the power zoom are arbitrary.

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

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

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

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

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

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

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

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

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

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

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

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

As described above, in the power zoom single-lens reflex camera of this embodiment, the positions of the zooming lens group 53Z and the focusing lens group 53F are the absolute positions of the code plate, the rotation amount of the zoom motor 65 for driving them, and the camera body 11. Since it is detected by the rotation amount (PZ pulse number, AF pulse number) of the AF motor 39 inside,
Highly accurate position detection becomes possible. Moreover, in this embodiment,
The zoom code plate not only corrects when the zooming lens group 53Z reaches the telephoto end and the wide-angle end and when the focusing lens group 53F reaches the infinity shooting end and the close-up shooting end, but also when the focal length is detected. PZ pulse count value correction processing is performed each time each code switching point 72 on the code 71 is detected, and AF pulse count is detected each time one of the plurality of indexes 83 on the distance code plate 81 is detected when the subject distance is detected. Since the value correction processing is performed, it is possible to detect the focal length and the subject distance with high precision and accuracy.
Since the power zoom single-lens reflex camera can accurately detect the focal length and the subject distance, more accurate image magnification constant control and control power zoom such as preset zoom become possible.

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

In the single-lens reflex camera equipped with the power zoom of this embodiment, when the main switch is turned on,
When the position of the current zoom lens group 53Z or the focusing lens group 53F is unknown, the position detection of the zoom lens group 53Z and the focusing lens group 53F is executed. In other words, the zoom motor 65 is driven in the tele direction until the switching point 72 of the focal length code 71 is detected, and when detected, the PZ pulse count value is corrected and then reversed to the position at the time of startup. Similarly, the AF motor 39 is driven in the short-distance shooting direction until the index 83 is detected, the AF pulse count value is corrected when the index 83 is first detected, and then the AF motor 39 is reversely rotated to the starting position. There is. Therefore, the current position can be reliably and accurately detected regardless of the positions of the zooming lens group 53Z and the focusing lens group 53F. It goes without saying that the directions in which the AF motor 39 and the zoom motor 65 are driven may be opposite directions, that is, the wide direction and the infinity focusing direction.

In this embodiment, the AF motor 39 is mounted on the camera body 11 and the zoom motor 65 is mounted on the photographic lens 51. However, the present invention may be arranged such that both motors are mounted on the camera body 11 or the photographic lens 51. Conversely, the AF motor may be mounted on the taking lens and the zoom motor may be mounted on the camera body. Further, although the structure of the code plates 71 and 81 for detecting the absolute position of the lens group is different for the focal length detection and the object distance detection, which structure of the code plates is used is arbitrary. Either one may be used.

Furthermore, in the single-lens reflex camera equipped with the power zoom of this embodiment, the zoom motor 69 under PWM control is used.
Since the end point detection time is variable (shorter at higher speeds) depending on the rotation speed of the, the overload of the zoom motor 69 decreases when the end point is reached at high speeds, and the energization time is set to the maximum (drive torque maximum) at low speeds. Since the end point is detected even when the end point does not rotate, it is possible to reliably detect the end point. Also, during power zoom, the zooming lens group 5
When 3Z becomes immovable without reaching the tele end or the wide end, the zoom code 71 detects that the end point does not come out, and the pseudo tele end flag is detected during the driving in the tele direction.
When F_LMTT is set to the wide direction, the pseudo wide end flag F_LMTW is set to distinguish the tele end and the wide end and the zoom motor is stopped once. Then, when the zoom motor is restarted by some operation or control, the above pseudo tele end flag F_LMTT and pseudo wide end flag F_LMTW are displayed.
Since it clears, the power zoom can be performed in both the tele direction and the wide direction. The end point detection device of the present invention is not limited to a power zoom mechanism, but can be applied to an electric lens such as an autofocus mechanism that drives a lens with a motor.

Further, in the PWM control of the zoom motor of this embodiment, the intermittent power feeding time, that is, the ratio of the energizing time and the non-energizing time is changed stepwise in a predetermined unit to perform zooming at a constant speed. That is, in the power zoom lens of this embodiment, if the PZ pulse output in conjunction with the rotation of the zoom motor 65 is not output within the set time, the energization ratio is increased by a predetermined unit (the energization time is increased by a predetermined time unit). By doing so, the torque of the zoom motor 65 is increased to increase the rotation speed, and when the PZ pulse is output within the set time, the energization ratio is reduced by a predetermined unit (the energization time is shortened by a predetermined time unit) to zoom. Stable constant speed control is realized by the control of reducing the torque of the motor 65 and slowing the rotation speed. In this embodiment, the set speed for PWM control of the zoom motor 65 is 6 ms, 8 ms and 16 ms for the PZ pulse output interval.
Although the configuration can be set in three stages of ms, the present invention is not limited to this. Further, although the sum of the feeding time and the non-feeding time is set to 4 ms in this embodiment, this is also optional.

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

The power zoom lens 51 of the present embodiment is provided with a zoom speed changeover switch 75, a zoom mode changeover switch 77 and an SL switch, and the lens CPU 61 executes a power zoom control operation in response to these switch operations. Power zoom control can be performed quickly regardless of the state of the body 11 side. Further, the lens CPU 61 and the body CPU 35 include an interface IC 62 as an input / output unit and a peripheral control circuit 23.
Since communication of commands and data is executed via the camera periodically and as needed, a linking process between the lens CPU 61 and the body CPU 35 is also possible.

In this embodiment, in the preset zoom set mode, the lens CPU 61 is the body CPU 35.
Then, when the SL switch is turned on, the focal length data at that time is stored in the lens memory means (lens RAM 61b), and the focal length data is further stored in the body CPU3.
Send to 5. Body CP that received this focal length data
The U35 shifts from the preset zoom set mode to the preset zoom mode, and transmits data regarding the preset zoom mode state to the lens CPU 61. Upon receiving the mode data, the lens CPU 61 drives the zoom motor 69 to the focal length stored in the lens RAM 61b when the SL switch is turned on. In this way, the lens CPU 61 and the body CPU 35 execute the parallel processing in cooperation with each other while communicating with each other, so that complicated processing can be executed quickly.

Further, the power zoom lens 51 of the present embodiment.
Since the power for the lens CPU 61 and the power for the zoom motor 65 are independently supplied from the battery of the body 11, when the power supply from the body is cut off, such as when the main switch of the body is turned off. , Lens CP
The operation of U61 and the memory holding operation of the lens RAM 61b are stopped. Therefore, in this embodiment, the main CPU 3
Before the power is turned off, the data stored in the lens RAM 61b is loaded on the clock on the lens side and transferred (saved) to the body 11. Then, when power is supplied to the power zoom lens 51 again, the saved data is transferred to the power zoom lens 51. The power zoom lens 51 is
The data transferred from the body 11 is transferred to the lens RAM 61b.
Make a note at the specified address. If this data is the preset focal length data, when the SL switch is turned on, the lens CPU 61 operates the zoom motor 65 up to the preset focal length.

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

In the single-lens reflex camera of the present embodiment, the zoom lens 51 is equipped with the electric means (zoom motor 69) and the lens control means (lens CPU 61) for controlling the electric means, and what is called the body control means (body CPU 35)? The drive control of the electric means can be performed independently. Further lens CPU
The lens CPU 61 and the body CPU 3 communicate with each other through the interface IC 62 serving as an input / output unit and the peripheral control circuit 23 periodically and as needed, as necessary.
Coordination processing is also possible with 5. The main CPU 35 monitors the power supply state by one of the communications. That is, the lens CPU 61 is caused to check whether or not the battery supply for the zoom motor is normally performed, the data regarding the check result is input, and if there is an abnormality, the power supply is cut off. In this embodiment, the body CPU 35 functions as a shutoff unit, and the lens CPU 61 functions as an abnormality detection unit.

The main CPU 35 uses the zoom motor 6
When activating No. 5, the above-mentioned monitoring is performed, and when it is not normally supplied, some trouble has occurred. Therefore, the supply to the zoom motor 65 is cut off to prevent the trouble. Moreover, at this time, since the power supply to the lens CPU 61 is not cut off, when the lens CPU 61 is operating normally, controls other than driving the zoom motor 65 can be executed. That is, since the power to the zoom motor 65 is simply cut off, the power zoom lens 51 normally functions as a manual zoom lens. In this embodiment, the battery is mounted on the camera body to supply power to the lens, but conversely, the battery may be mounted on the lens to supply power to the body. Also,
The present invention is not limited to a camera and can be applied to general devices including a power feeding device and a power fed device.

The single-lens reflex camera equipped with the power zoom lens of this embodiment stores the focal length at that point in time as the preset focal length when the SL switch is turned on when the preset zoom set mode is selected. When the SL switch is turned on next time, the power zoom is performed up to the preset focal length because the mode is changed to the preset zoom mode when the memory is stored. Therefore, the photographer can easily change the focal length stored in the memory by storing the focal length that is frequently used even when the focal length is changed to another focal length. Further, in the power zoom lens 51 of this embodiment, when the main switch of the body 11 is turned off, the power to the lens 51 is turned off. Therefore, when the preset focal length is stored in the lens RAM 61b, the preset focal length is stored. Is transferred to the camera body 11 and stored in the body RAM 35b. Then, when the main switch is turned on, the preset focal length stored in the body RAM 35b is transferred to the power zoom lens 51 and stored in the lens RAM 61b to enable preset zoom.

[0380] The power zoom lens 51 has a structure in which the main body 11 is turned off when the main switch of the body 11 is turned off.
In response to the PZ storage command from 1, the lens ZCPU65
Activates the zoom motor 69 to power zoom to the focal length where the lens barrel becomes the shortest. Therefore, the photographer
When not shooting, just turn off the main switch,
The lens barrel can be easily made compact. When the PZ is housed, the body 11 has the power zoom lens 5
Since the AF motor 39 drives the first focusing lens group 53F to the position where the lens barrel becomes the shortest (infinity position), the power zoom lens 51 has the shortest overall length. The current focal length data at the time of storing the zoom is transferred to the camera body 11 by new communication and stored in the body RAM 35b. This current focal length data is transferred to the power zoom lens 51 by new communication when the main switch is turned on, and is stored in the lens RAM 65b.
Then, the lens CPU 65 drives the zoom motor 69 up to the transferred current focal length data. By this processing, the power zoom lens 51 returns to the state before storage.

In the single-lens reflex camera equipped with the power zoom lens of the present embodiment, during constant image magnification control, the power zoom control is performed by obtaining the image magnification and the target focal length on the basis of the amount of extension of the focusing lens group. It's easy. Moreover, since it follows only the movement of the focusing lens unit, there is no unstable element in the lens driving operation, and stable stable zoom control of the image magnification is possible with good responsiveness.
When the image magnification is out of focus, the image magnification and the target focal length are calculated based on the defocus amount. When the image is in focus, the image magnification and the target focal length are calculated based on the focus lens extension amount. Therefore, more accurate image magnification constant control becomes possible.

As described above, in the single-lens reflex camera equipped with the power zoom lens of this embodiment, the zoom motor 65 is activated to start zooming up or zooming back when almost half of the exposure time has elapsed, so that a clear still image is obtained. The subject image and the subject image that expands or contracts so as to flow are exposed. In addition, since zoom-up (tele direction) or zoom-back (wide direction) zooming can be selected, it is possible to perform zooming during exposure according to the photographer's intention. Also, since the zooming speed is changed according to the exposure time,
Effective during-exposure zooming from ultra-low shutter speeds to medium to high shutter speeds. Particularly, when the shutter speed is low, the zooming can be continued until the end of the exposure by performing the zooming at low speed, and the zooming at the highest speed can be performed at the middle and high shutter speeds, so that effective inter-exposure zooming can be performed.

[0383]

As described above, according to the present invention, the power zoom lens detachable from the camera body and the camera body are provided with the communication means capable of mutually communicating information such as commands and data. It becomes possible to perform various power zoom controls by organically linking between them. Further, according to the present invention, the position of the movable lens group is detected by counting the rotation amounts of the code plate and the electric means, so that the accuracy is high and each time the code switching point or the specific code is detected. Since the count value is corrected, the error becomes very small.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an embodiment of a single-lens reflex camera body to which the present invention is applied.

FIG. 2 is a block diagram showing an outline of an embodiment of a power zoom lens for a single lens reflex camera to which the present invention has been applied.

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

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

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

FIG.

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

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

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

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

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

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

FIG. 13 is a flowchart regarding a PWM interrupt.

FIG. 14 is a time chart regarding PWM control.

FIG. 15:

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

FIG. 17:

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

FIG. 19 is a flowchart regarding standby processing.

FIG. 20 is a flowchart relating to AF pulse initialization processing.

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

FIG. 22 is a flowchart of a power zoom lens storage process.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

FIG. 39:

FIG. 40:

FIG. 41

FIG. 42:

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

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

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

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

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

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

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

[Fig. 50] Fig. 50 is a flowchart relating to a process of transmitting zoom data with constant image magnification on the side of a taking lens.

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

FIG. 52

FIG. 53

FIG. 54

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

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

FIG. 57:

FIG. 58 is a flowchart of AF initialization processing.

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

FIG. 60A]

FIG. 60B]

FIG. 61 is a flowchart regarding PZ loop processing.

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

FIG. 63:

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

FIG. 65:

[Fig. 66] Fig. 66 is a flowchart of a second example of a constant image magnification zoom.

FIG. 67:

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

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

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

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

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

FIG. 73:

FIG. 74:

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

FIG. 76 is a flowchart relating to PZ pulse count interrupt processing.

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

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

FIG. 79:

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

FIG. 81:

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

FIG. 83:

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

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

FIG. 86

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

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

FIG. 89 is a flowchart relating to PZ pulse counter correction processing.

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

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

FIG. 92 is a flowchart relating to release processing in the camera body.

FIG. 93 is a timing chart regarding zoom during exposure.

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

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

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

[Explanation of symbols]

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

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G03B 17/14 7348-2K

Claims (78)

[Claims] 1. A photographing lens comprising an optical system including a movable lens group movable in the optical axis direction, and a lens moving mechanism for moving the movable lens group, at least one of which is interlocked with the movable lens group. Code moving means for reading a code relating to the position of the movable lens group formed on the movable code member and the code member; the operation amount of the lens moving mechanism is counted with a specific position of the movable lens group as an initial value. Counting means; Lens position detecting means for detecting the position of the moving lens group based on the count value of the counting means; Position of the focusing lens group when the code reading means detects the switching point of each code A reference count value memory means in which each is stored as a reference count value; and the code reading means switches the code. Count value correcting means for comparing the count value of the counting means with the reference count value corresponding to the switching turning point every time a rising point is detected, and performing a predetermined count value correction; Shooting lens to do. 2. A moving lens group comprising: an optical system including a movable lens group that is movable in the optical axis direction; and a lens moving mechanism that holds the movable lens group so as to be movable in the optical axis direction. Code reading means for reading a code relating to the position of the code member and the lens group formed on the code member, at least one of which moves in conjunction with the code member; the operation amount of the lens moving mechanism, the specific position of the moving lens group, Counting means for counting as an initial value;
A lens position detecting means for detecting the position of the movable lens group based on the count value of the counting means; a memory for each position of the focusing lens group when the code reading means detects a specific code as a reference count value. The reference count value memory means, and each time the code reading means detects the specific code,
A photographic lens, comprising: a count value correcting means for comparing a count value of the counting means with the reference count value corresponding to the specific code to perform a predetermined count value correction. 3. The count value correcting means according to claim 1, wherein the absolute value of the difference between the reference count value and the count value of the counting means is equal to or more than a predetermined value, the count value of the counting means is set. A photographing lens which is changed to the reference count value and which does not change the count value of the counting means when it is less than the predetermined value. 4. The lens position detecting device according to claim 3, further comprising a moving end detecting unit that detects that the moving lens group is at a moving limit end of at least one of the movable regions of the movable lens group. A reference pulse corresponding to the movement limit end is stored in the count value memory means, and the count value correction means detects the count value of the count means when the movement end detection means detects that the movement end is the movement end. A shooting lens that corrects for. 5. The reference count value memory means according to claim 2, wherein the reference count value memory means stores two different reference count values according to a width of the specific code according to a direction in which the code detecting means detects the specific code. A memory for each specific code, and the count value correcting means corrects the count value based on the reference count value corresponding to the contact direction of the brush when the brush contacts the index. .. 6. A power lens attachable to and detachable from a camera body comprising an optical system including a movable lens group movable in the optical axis direction, and a lens moving mechanism for holding the movable lens group movably in the optical axis direction. In the above, an electric member for driving the lens moving mechanism; a specific position detecting means for detecting when the moving lens group is at a specific position; a driving amount of the electric means is counted with the specific position of the moving lens group as an initial value. Counting means; count value memory means for storing the value counted by the counting means; lens control means for activating the electric member to drive the movable lens group in the specific position direction under predetermined conditions; and Initial value setting means for changing the count value of the counting means to the initial value when the specific position detecting means detects the specific position. Power lens characterized by. 7. The lens control means according to claim 6, when the specific position detection means detects that the movable lens group has reached the specific position after the activation of the electric member,
A power lens that reverses the electric member to return the movable lens group to the starting position. 8. The power lens according to claim 7, further comprising return value counting means for counting a rotation amount of the electric member when the lens control means activates the electric member toward the specific position. The lens control means is a power lens for returning the movable lens group to the starting position based on the count value of the return value counting means. 9. The power lens according to claim 8, wherein driving power for operating the electric member and constant voltage for operating the lens control means are supplied from a camera body through separate supply circuits, and The predetermined condition is a power lens when the constant voltage is supplied to the lens control means. 10. An optical system including a moving lens group and a lens moving mechanism that holds the moving lens group so as to be movable in a predetermined moving range in the optical axis direction, wherein the moving lens group is driven to drive the moving lens group. An electric means for moving the lens moving mechanism; a counter for counting the time when the lens moving mechanism becomes inoperable when the lens moving mechanism becomes inoperable during operation of the electric means; and an operating speed of the electric means. A power lens comprising: a control unit that stops the electric drive unit when the counter counts a time corresponding to the operating speed when the lens moving mechanism becomes inoperable. 11. The power lens according to claim 10, wherein the time corresponding to the operating speed is shorter as the operating speed of the electric means is faster. 12. The electric lens according to claim 11, further comprising detection means for detecting the position of the movable lens group, wherein the lens control means determines the position of the lens group when the electric means is stopped. A power lens for re-driving the electric means in both directions when the position is not at the limit position of the movement range. 13. The lens control means according to claim 11, wherein when the position of the lens group is at a limit position of one movement range when the electric drive means is stopped, the electric drive means is moved toward the other movement end direction. Power lens that only restarts. 14. The power lens according to claim 13, wherein the lens control means operates in the one moving end direction after the electric driving means is restarted in the other moving end direction. 15. A zoom lens comprising: a camera body; a zooming lens group that is attachable to and detachable from the camera body; and a lens moving mechanism that holds the zooming lens group movably within a predetermined moving range in the optical axis direction. An electric means for driving the lens moving mechanism to move the moving lens group to the zoom lens; a time during which the lens moving mechanism becomes inoperable when the lens moving mechanism becomes inoperable during the operation of the electric means. A counter that counts; and a lens that controls the operating speed of the electrically-powered means and that stops the electrically-powered means when the lens moving mechanism becomes inoperable and the counter counts a time corresponding to the operating speed. A camera system provided with a control means. 16. A camera according to claim 15, wherein said zoom lens is detachably formed on a camera body, and is provided with said electric drive means, said lens position detection means, said end point detection means and said lens control means. system. 17. The camera body according to claim 16, wherein when the zoom lens is mounted, drive power is supplied to the electric means of the zoom lens and constant voltage is supplied to the lens control means by different paths. A camera system with a power zoom lens equipped with a battery. 18. The power zoom lens and the camera body according to claim 17, further comprising an input / output unit for exchanging data regarding the power zoom, and the camera body is provided with a lens via the input / output communication unit. A camera system comprising a body control means for operating the electric means in the control means. 19. An optical system comprising a moving lens group and a lens moving mechanism for holding the moving lens group so as to be movable in the optical axis direction, wherein the lens moving mechanism is driven to move the moving lens group in the optical axis direction. Electric means for moving; Power feeding means for intermittently and continuously feeding electric power to the electric means; Detection means for issuing a detection signal every predetermined amount of operation in conjunction with the operation of the electric means; Operation speed of the electric means of the detection means Speed setting means for setting the output time interval of the detection signal; and when the detection signal is output within the interval set by the speed setting means, the intermittent power supply time of the power supply means is shortened by a predetermined unit time unit, A lens driving device including a power supply control means for extending the intermittent power supply time of the power supply means by a predetermined time unit when the detection signal is not output within the set interval. . 20. The power supply control means according to claim 19,
A lens driving device that has a plurality of different intermittent power feeding time setting functions in stages, and starts intermittent power feeding from the shortest intermittent power feeding time when starting the power feeding. 21. The lens drive device according to claim 19, wherein the sum of the power feeding time and the non-power feeding time is constant. 22. The lens driving device according to claim 19, further comprising a switch means for selecting an output interval of the detection signal of the detecting means, and the speed setting means sets the output time interval selected by the switch means. Lens drive device to set. 23. A camera system according to claim 19, wherein the optical system is a zoom lens detachably formed on the camera body. 24. The camera system according to claim 23, wherein the camera body includes a battery for supplying drive power for the electric power means to the power zoom lens. 25. The camera system according to claim 24, further comprising a power zoom operation switch for selecting a power zoom direction and a zooming speed. 26. The power zoom lens and the camera body according to claim 25 are provided with an input / output unit for exchanging data regarding the power zoom, and the camera body is further provided with the speed setting unit. Camera system. 27. The camera body according to claim 26, further comprising body control means for sending the zoom speed data set by the speed setting means of the camera body to the lens control means via the input / output means. Camera system. 28. A camera system comprising a zoom lens group, a zoom lens having a zoom mechanism for holding the zoom lens group so as to be movable in the optical axis direction, and a camera body to which the zoom lens is detachable, The zoom lens includes an electric member that drives the zoom mechanism to move the zoom lens group; a lens control unit that controls the operation of the electric member; a switch unit that causes the lens control unit to execute a predetermined control operation; An input / output unit for executing input / output of data with the camera body, wherein the camera body controls the overall functions of the camera system;
And a lens control means for executing data input / output with the lens control means via the input / output means; 29. The zoom lens according to claim 28,
A camera system which is a power zoom lens including a focal length detection unit for detecting a focal length, a lens memory unit for storing the focal length, and a clock unit. 30. The camera system according to claim 29, wherein the power zoom lens executes data communication with the body control means via the input / output means in synchronization with the clock of the clock means. 31. The switch means of the zoom lens according to claim 28 is a zoom speed changeover switch, and when the zoom speed changeover switch is operated, the lens control means operates the electric motor according to the operation. A camera system that operates members in the tele or wide direction. 32. The lens control means according to claim 31, wherein when the predetermined command is input from the body control means through the input / output means, the focus is adjusted when the zoom speed changeover switch returns to the neutral position. A camera system in which focal length data detected by distance detecting means is stored in the lens memory means and further transferred to the body control means via the input / output means. 33. The lens control means according to claim 32, wherein when the preset zoom set mode data is input from the body control means through the input / output means, the switch means is turned on. A camera system in which the current focal length detected by the focal length detecting means is stored in the lens memory means. 34. The lens control means according to claim 33, wherein when the switch means is turned on after the preset zoom mode data is input from the body control means via the input / output means. A camera system for moving the zoom lens group to the present focal length stored in the memory via the electric means. 35. A camera system comprising a photographing lens equipped with an electric member and control means for controlling the electric member, and a camera body to which the photographing lens is attachable / detachable, wherein a power supply means provided in the camera body. A power supply circuit provided to the photographing lens and the camera body for independently supplying the electric power of the power supply means to the electric member and the control means; power supply to the electric means provided to the photographing lens An abnormality detecting means for detecting whether or not there is an abnormality; and a shutoff means provided in the camera body for shutting off power supply to the electric means when the abnormality detecting means detects an abnormality. Camera system characterized by. 36. The power supply means according to claim 35 includes a battery, and the camera body separates electric power for the electric power means and a constant voltage for the lens control means from the battery. A camera system that supplies power zoom lenses via electrical contacts. 37. The zoom lens according to claim 36, wherein the taking lens includes a zoom lens group, and a zoom mechanism that holds the zoom lens group so as to be movable in the optical axis direction. A camera system that is a zoom motor that drives a zoom mechanism to move the zoom lens group. 38. The camera system according to claim 37, wherein the body control means has a battery check function of causing the lens control means to check whether or not the electric power for the electric means is supplied. 39. The camera system according to claim 38, wherein the lens control unit detects an abnormality by checking a voltage of a power supply terminal for the electric drive unit. 40. The camera system according to claim 39, wherein the body control means, when the battery check detects that the power is not normally supplied, stops the power supply for the electric power means. 41. A camera system comprising: a camera body; and a zoom lens detachably attached to the camera body, wherein the zoom lens includes a zooming lens group that moves in an optical axis direction to change a focal length. And zooming means for driving the zoom lens, focal length detecting means for detecting the focal length of the zoom lens, memory means for storing the focal length detected by the focal length detecting means, and the focal length stored in the memory means. A camera system comprising: a control unit that drives a drive unit. 42. The power zoom lens according to claim 41, comprising a zoom operation switch for activating the driving means to drive the zooming lens group in a tele direction and a wide direction. 43. The camera body according to claim 42, further comprising a preset zoom set mode for storing the focal length in the memory means, and a body control means for selecting the preset zoom mode up to the focal length stored in the memory means. Camera system. 44. The power zoom lens according to claim 43, wherein the power zoom lens includes a zoom mode switch, and the camera body includes a zoom mode change switch for changing the zoom mode when the zoom mode switch is turned on. Camera system. 45. The power zoom lens according to claim 44, wherein the focal length detected by the focal length detection means is stored in the memory means when the body control means selects the preset zoom set mode, and the preset is performed. A camera system in which the lens control means is provided with a preset switch for zooming to the focal length stored in the memory means via the electric means when the zoom mode is selected. 46. The camera body control means according to claim 45, wherein the preset zoom set mode is set to the preset zoom when the focal length is stored in the memory means while the preset zoom set mode is selected. A camera system that changes mode to mode. 47. A camera comprising a camera body and a zoom lens detachably formed on the camera body, the zoom lens comprising a zooming lens group that moves in the optical axis direction to change the focal length, wherein the zoom lens is A zoom motor for driving the zooming lens group to perform zooming; a focal length detecting means for detecting a focal length of the zoom lens; a lens memory means for storing the focal length detected by the focal length detecting means; and the lens memory. Lens control means for driving the zoom motor up to the focal length stored in the memory, the camera body stores the focal length detected by the focal length detection means in the memory means; Driving power is supplied, and constant voltage is supplied to the focal length detecting means and the memory means. That power; and the lens memory means body memory means for memory focal length data memory; camera system characterized in that it comprises a. 48. A camera system according to claim 47, wherein the power zoom lens and the camera body each include an input / output unit for transmitting / receiving the focal length data. 49. The camera system according to claim 48, wherein the body control means includes a main switch for turning on / off power supply to the power zoom lens. 50. The body control means according to claim 49, when the main switch is turned off, the preset focal length data stored in the lens memory means is stored in the input / output before the power supply is turned off. A camera system for inputting via a means and storing in the body memory means. 51. The body control means according to claim 50, wherein when the main switch is turned on, the preset focal length data stored in the body memory means is supplied to the power zoom lens via the input / output means. A camera system which transfers the data to the lens memory means and causes the lens memory means to perform the memory. 52. The power zoom lens according to claim 49, further comprising a memory means for storing position data of the zooming lens group in which the lens barrel has the shortest length, and the body control means turns off the main switch. The camera system for causing the lens control means to move the zooming lens group to a position where the lens barrel becomes the shortest when the above is performed. 53. A camera system according to claim 52, wherein when the main switch is turned off, current focal length information stored in the lens memory means is input and stored in the body memory means. 54. The body control means according to claim 53, wherein when the main switch is turned on after being turned off, the constant voltage is supplied to the power zoom lens and the current focus stored in the body memory means. A camera system for outputting distance data to the power zoom lens via the input / output means. 55. A camera system according to claim 54, wherein the lens control means stores the input current focal length data in the lens memory means and drives the zoom motor to the focal length. 56. A camera system according to claim 48, wherein the lens control means causes the lens control means to stop the operation of the electric means via the input / output means at the start of release. 57. In a camera having a zoom lens and an autofocus device, a zoom motor for zooming the zoom lens; a focal length detection device for detecting a focal length of the zoom lens; A subject distance detecting device for detecting the subject distance of the subject; hand,
A camera system provided with a power zoom lens provided with a calculation unit for calculating a target focal length at which the image magnification becomes constant. 58. The camera system according to claim 57, further comprising lens control means for driving the zoom motor up to the target focal length calculated by the calculation means. 59. The camera according to claim 58, wherein the automatic focusing device includes a distance measuring sensor that detects a defocus amount, and an AF motor that drives the focusing lens to a focus position based on the defocus amount. system. 60. A camera system according to claim 57, comprising a switch means for causing the arithmetic means to start the image magnification calculation, and a memory means for storing the image magnification calculated by the arithmetic means. 61. The camera system according to claim 57, wherein the camera system has a zoom operation switch for operating the zoom motor, and the operation means executes the image magnification operation when the zoom operation switch returns to an off state. Camera system to be used. 62. The calculation means according to claim 60 or 61, wherein when the switch means is operated, the defocus amount detected by the distance measuring sensor and the defocus amount detected by the distance measuring sensor when the zoom lens is out of focus. A camera system that calculates image magnification based on the focal length detected by subject distance detection. 63. The calculation means according to claim 62, wherein the target focal length f is expressed by the following formula: f = x ₀ × f ₀ / (x + Δx) where x ₀ is a focusing lens from the infinite position when setting the image magnification. Group extension amount f ₀ : Focal length when image magnification is set x: Extension amount of focusing lens group from infinity position Δx: Camera system calculated by current defocus amount 64. The focal length detected by the object distance detection according to any one of claims 60 to 63, when the zoom lens is in focus when the switch is operated. And a camera system for calculating an image magnification based on the focal length detected by the focal length detecting means. 65. The calculating means according to claim 64, wherein the target focal length f is expressed by: f = x ₀ × f ₀ / x, where x ₀ : of the focusing lens group from the infinity position when setting the image magnification. Extension amount f ₀ : Focal length when image magnification is set x: Camera system that calculates by the extension amount of the focusing lens group from the infinity position. 66. The camera system according to claim 63 or 65, further comprising an AF switch for actuating the automatic focusing device, and the arithmetic means is the AF switch when the image magnification is stored in the memory means. When is turned on, the target focal length is calculated based on the in-focus subject distance detected by the subject distance detecting means and the image magnification when in focus, and when out of focus, the automatic focusing device detects A camera system for calculating a target focal length based on the defocus amount and the subject distance data detected by the subject distance detecting means. 67. The camera system according to claim 63, wherein the lens control means drives the zoom motor to a target focal length calculated by the calculation means. 68. The camera system according to claim 67, wherein after the driving of the zoom motor is completed, the calculating means calculates the image magnification at this position, and when the image magnification is different from the stored image magnification. A camera system that calculates a target focal length that yields the stored image magnification, and the lens control means drives the zoom motor to the calculated target focal length. 69. The camera system according to claim 68, wherein when the object measured by the distance measuring sensor is moving, the calculating means calculates the moving speed of the object image and determines the moving speed according to the moving speed. A camera system that adjusts the zoom speed. 70. A zoom lens having a zoom mechanism for movably holding a zooming lens group in a direction along an optical axis, and a camera having a shutter mechanism to which the zoom lens is detachable, wherein the zoom lens is the zoom mechanism. And a lens control means for controlling the electric means, wherein the camera body has a predetermined time after the shutter mechanism opens the shutter and before closing the shutter.
A camera having a power zoom lens, characterized in that the lens control means is provided with body control means for starting zooming. 71. The body control means according to claim 70 has a function of setting the shutter opening time of the shutter mechanism, and the set shutter opening time is approximately 1 after the shutter is opened by the shutter mechanism. A camera that activates the electric means when the time of / 2 has elapsed. 72. A camera according to claim 71, wherein the body control means has a function of driving the electric means at a speed according to the set shutter opening time. 73. The body control means according to claim 72 drives the electric drive means at maximum speed when the set shutter opening time is shorter than or equal to a predetermined time, and when the set shutter opening time is longer than the predetermined time, the body control means operates according to the length. A camera that drives the electric means at a low speed. 74. A camera according to claim 73, wherein the body control means does not drive the electric means when the set shutter opening time is shorter than a predetermined time. 75. The camera according to claim 70, further comprising zooming direction setting means for setting a zooming direction during exposure. 76. A camera according to claim 70, wherein the power zoom lens and the camera body are provided with an input / output means for exchanging data regarding the power zoom with the lens control means and the body control means. 77. The body control means according to claim 70, further comprising: direction setting means for setting a zooming direction at the time of exposure, wherein the set zoom direction is transferred to the lens control means via the input / output means. The camera to transfer. 78. A camera according to claim 77, wherein the body control means outputs the during-exposure zoom start signal to the lens control means via the input / output means at the time of starting the zooming.