JP2000056375A - Accessory unit and camera body unit used for camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable one part of the program of a microcomputer arranged in an accessory to be corrected according to a camera having a new function only by using a general-purpose microcomputer at the camera side. SOLUTION: When an accessory device 2 is attached to a camera body 1, bidirectional communication is executed between them by the communication part 11 of the body 1. Then, the discrimination code of the accessory device 2 is decided and prescribed data for controlling the accessory device 2 is transferred according to the decided result. By the accessory device 2, the prescribed data transferred from the body 1 and related on the control of the accessory device 2 are stored in an additional program area 26 through a communication part 21 and a program writing part 25. When the prescribed data are stored in the area 26, they are recognized as one part of program data by a control part 22 and the action of the accessory device 2 is controlled according to the program data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a plurality of types of camera bodies, for example, a camera body using a silver halide film, an electronic camera using an image pickup device such as a CCD, and accessories such as interchangeable lenses. And a camera system comprising:

[0002]

2. Description of the Related Art In recent years, a microcomputer is usually built in a camera accessory such as an interchangeable lens, and the camera accessory is a program written in a read-only memory (ROM) of the microcomputer. It works according to. This program is
It is designed to work optimally with the combination of camera and accessories that was considered when designing the camera system.

For example, data stored in a lens or a strobe mounted on a camera is transmitted to the camera, and a calculation for auto focus (AF) and a calculation for exposure determination are performed on the camera side based on the transmitted data. Then, accessories such as a lens drive amount, an aperture value, a strobe light emission amount, a light emission timing, and the like are controlled in accordance with the calculated value.

[0004] In these conventional camera accessories,
The microcomputer program includes programs corresponding to all cameras mounted at the time of design. However, as the product cycle becomes shorter today, cameras with new functions are being developed one after another, and it is said that old accessories without these new functions can not support cameras with new functions. Challenges arise.

Therefore, when a user having an old accessory purchases a camera having a new function and intends to use the new function, the user must purchase accessories for a system corresponding to the new function. Money was wasted.

To solve this problem, Japanese Patent Laid-Open No.
It is disclosed in 96032. That is, according to the technique disclosed in Japanese Patent Application Laid-Open No. 4-96032, a camera accessory includes a program counter, a read-only memory,
It has an instruction decoder and an electrically writable memory for a change program. Further, when the program counter matches the change address data stored in the change program memory, the camera accessory outputs the change program data stored in the change program memory to the instruction decoder, and does not match. Sometimes, a microcomputer that outputs program data stored in the read-only memory to the instruction decoder, and a write control that receives change data transmitted from the camera and writes the change data to the change program memory of the microcomputer Means and control means for controlling the accessory element according to the decoder value output from the instruction decoder of the microcomputer. That is, in the above publication, a part of the microcomputer program in the accessory can be modified in accordance with a camera having a new function.

[0007]

Problems to be Solved by the Invention Japanese Patent Laid-Open No. 4-9 / 1990
In Japanese Patent No. 6032, when the program counter matches the change address data stored in the change program memory, the change program data stored in the change program memory is output to the instruction decoder. A microcomputer for outputting the program data stored in the read-only memory to the instruction decoder is required. That is, in order to use the old accessory, a special microcomputer is required on the camera side.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and uses only a general-purpose microcomputer without using a special microcomputer on the camera side. It is an object of the present invention to provide an accessory unit and a camera body unit used in a camera system that can be partially modified in correspondence with a camera having a new function.

[0009]

That is, according to the present invention, there is provided a communication means for communicating with a mounted camera body unit and receiving data output from the camera body, and at least a part of which can be rewritten or additionally written. A program memory storing an operation control program; command execution means for executing a command stored in the program memory in response to data received from the camera body unit; and data received from the camera body unit. A memory area constituting at least a part of the program memory called in response to the received data, wherein a custom program area whose contents can be rewritten or additionally written in accordance with the received data is provided. .

The present invention also provides a mounting detecting means for detecting mounting of an accessory unit and outputting a mounting detection signal,
An additional program memory that is provided in the accessory unit and stores additional program data for writing a control program in a custom program area in which the contents can be rewritten or additionally written, and transmits data to the attached accessory unit. Communication means for transmitting the additional program data to the communication means in response to the mounting detection signal.

In the present invention, the communication means
Communication is performed with the mounted camera body unit, and data output from the camera body is received. Then, an operation control program, at least a part of which is rewritable or additionally rewritable, is stored in the program memory. In response to the data received from the camera body unit, the instructions stored in the program memory are executed by the instruction executing means. The custom program area is a memory area that constitutes at least a part of the program memory that is called in response to data received from the camera body unit, and whose contents are rewritten according to the received data. Alternatively, additional writing is enabled.

In the present invention, the mounting of the accessory unit is detected by the mounting detecting means, and a mounting detection signal is output. The additional program memory provided in the accessory unit stores additional program data for writing a control program in a custom program area in which the contents can be rewritten or additionally written. Then, data is transmitted to the attached accessory unit by the communication means. Further, the additional program data is transferred to the communication means by the program writing execution means in response to the mounting detection signal.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the concept of the present invention and is a block diagram showing the configuration of a camera system.

Referring to FIG. 1, the camera system includes a camera body 1 and an accessory device 2 such as an interchangeable lens.

The camera body 1 includes the accessory device 2
A communication unit 11 for performing bidirectional communication with the computer, a correction program memory 12 storing predetermined data for controlling the accessory device 2, and a control unit 13 for controlling operations of the communication unit 11 and the correction program memory 12. It consists of.

The accessory device 2 has a communication unit 21 for performing bidirectional communication with the mounted camera body 1, a control unit 22 for controlling the operation of the accessory device 2, a subroutine executing unit 23, and a subroutine executing unit. It has a fixed program area 24 as the program memory 1 executed by the section 23, a program writing section 25, and an additional program area 26 as the program memory 2 for storing additional program data.

In such a configuration, in the camera body unit 1, when the accessory device 2 is mounted, the communication unit 11 performs two-way communication with the accessory device 2. Further, the identification code of the accessory device 2 is determined by the control unit 13, and in accordance with the determination result, predetermined data for controlling the accessory device 2 is read out from the correction program memory 12 via the communication unit 11 and the accessory device 2 is read. 2

In the accessory device 2, bidirectional communication is performed with the camera body 1 mounted by the communication unit 21.
When the operation corresponding to the predetermined data stored in the fixed program area 24 is performed, the control unit 22
Through the subroutine execution unit 23, the subroutine of the fixed program area 24 is executed.

On the other hand, when predetermined data relating to control is transferred from the camera body 1 via the communication unit 21, the predetermined data is stored in the additional program area 26 via the program writing unit 25. When the predetermined data is stored in the additional program area 26, the predetermined data is recognized as a part of the program data by the control unit 22 and is stored in the additional program area 26 by the subroutine execution unit 23. The operation of the accessory device 2 is controlled in accordance with the program data.

The data transmitted between the communication unit 11 and the communication unit 21 is, for example, communication mode data, a subroutine start address, program data, ID data, and the like.

Next, a first embodiment of the present invention will be described.

FIG. 2 shows the structure of the first embodiment, and is a sectional view showing a state in which an interchangeable lens as an accessory device is mounted on a camera body for a silver halide film.

In FIG. 2, in a camera body (F body) 30 for loading a silver halide film into which a silver halide film is loaded, a quick return mirror 31 having a half mirror at a substantially central portion is provided. I have. The subject light reflected upward by the quick return mirror 31 reaches the eyepiece 34 via the focusing screen 32 and the pentaprism 33.

A sub-mirror 35 is provided on the center rear surface of the quick return mirror 31 so as to reflect the subject light downward. An AF module 36 is arranged in the direction of the reflection optical axis of the sub-mirror 35 and in a direction substantially perpendicular to the drawing.

Behind the quick return mirror 31, a focal plane shutter (shutter) 37 is provided.
Are arranged, and a silver halide film 38 is arranged behind the shutter 37.

On the other hand, an interchangeable lens 40 mounted on the camera body 30 has a photographing lens 41 composed of a plurality of lens groups, an aperture mechanism 42, and a stepping motor 43 for driving the aperture mechanism 42. have.
The interchangeable lens 40 also has a zooming mechanism (not shown).

FIG. 3 shows the structure of the first embodiment, and is a cross-sectional view showing a state in which an interchangeable lens as an accessory device is mounted on a camera body for an image pickup device.
Note that, in FIG. 3, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 3, an optical filter 51 and a CCD image pickup device 52 are arranged behind a quick return mirror 31 in a camera body (D body) 50 for an image pickup device. The optical filter 51 includes a low-pass filter and an infrared cut filter.

The low-pass filter is for preventing the appearance of moire fringes in the image output.

FIG. 4 shows a camera body 30 made of a silver halide film.
7 is a perspective view showing a state where an interchangeable lens 40 is mounted.

On the upper surface of the camera body 30, a release button (release switch) 61, a display element 62 for displaying information such as a photographing mode, and a mode setting switch 63 for setting a photographing mode and the like of the camera. Is arranged. A mount 64 and an electric contact 65 for communication are provided on a portion of the camera body 30 where the interchangeable lens 40 is mounted.

On the other hand, outside the interchangeable lens 40, a tele switch (TELES) for zooming to the tele side is provided.
W) 71 and a wide switch (WIDE SW) 72 for zooming to the wide side. A mount 73 on the lens side and an electric contact 74 for communication are provided on a portion of the interchangeable lens 40 facing the camera body 30.

FIG. 5 shows a camera body 3 for a silver halide film.
FIG. 2 is a block diagram of an electrical system showing a configuration in which an interchangeable lens 40 is attached to a lens 0.

In FIG. 5, the camera body (F body)
The FCPU 100 on the 30 side is constituted by a microcomputer, and performs sequence control inside the F body 30. A power switch (SW) 102 and a power battery 103 mounted on the camera are connected to the FCPU 100 via a DC / DC converter 101. The DC / DC converter 101 boosts the output voltage VE of the power supply battery 103 to obtain a boosted output VCC. Here, the output voltage VE is used as a power source of a power source of a power system such as control motors to be described later,
The output VCC is used as a power supply voltage of a signal processing system circuit such as the FCPU 100.

In the FCPU 100, a photometric sensor 104 installed in the finder optical system and used for measuring the brightness of the subject and determining the exposure time includes a photometric processing circuit for processing the output of the photometric sensor 104. A display device 106 for displaying a camera photographing mode or the like is connected via a display control circuit 107 for driving and controlling the display device 106.
Note that the display element 106 corresponds to the display element 62 in FIG.

Further, the FCPU 100 has a mode setting switch (SW) 108 for setting a photographing mode and the like.
(Corresponding to the mode setting switch 63 of FIG. 3), release switch (corresponding to the release switch 61 of FIG. 3)
The first release switch (1RSW) 109 which is turned on by the first stroke of the first switch, and the second release switch (2RSW) 110 which is turned on by the second stroke of the release switch are connected.

The FCPU 100 is also connected via a shutter control circuit 111 to a front curtain control magnet 112 for controlling the front curtain of the focal plane shutter and a rear curtain control magnet 113 for controlling the rear curtain of the focal plane shutter. Is done.

The FCPU 100 has a winding / rewinding motor 115 for controlling film winding / rewinding via a winding / rewinding control circuit 114, and a quick return mirror via a mirror shutter S charge control circuit 116. An AF sensor 120 for detecting the focus state of the lens via a mirror shutter S charge motor 117 for controlling the up / down operation of the 31 and a shutter charge mechanism, a film sensitivity reading circuit 118, and an AF sensor interface circuit 119. , Are connected respectively. The drive source of the front curtain and the rear curtain of the shutter is a spring, and the spring must be charged in preparation for the next exposure after the opening and closing operation of the shutter.

The F body 30 and the interchangeable lens 40 are connected by a mount contact 130. This mounting contact 13
0 corresponds to the mount contacts 65 and 74 in FIG.
Each electric signal is as follows.

That is, VE is used as a power source for a power source of a power system such as control motors. VCC is used as a power supply voltage of a circuit of a signal processing system such as an IC. LRST is a CPU (FCPU1) in the F body 30.
00) to the LCPU 140 described later. The initialization of necessary parts in the memory in the LCPU 140 and the initialization of the state of the mechanical system are performed by this signal.

BREQL corresponds to the CPU (F
The communication request signal is output from the CPU 100 or the like to the LCPU 140. LREQB is transmitted from LCPU 140 to F
This is a communication request signal output to a CPU (such as the FCPU 100) in the body 30.

Further, CLK is a synchronous clock signal line for data communication. CPU (F
When communication is performed from the CPU 100 or the like) to the LCPU 140, the CPU in the F body 30 (the FCPU 100 or the like)
Outputs a CLK signal to the LCPU 140.
From the LCPU 140 to the CPU in the F body 30 (FCPU1
00, etc.), the LCPU 140 outputs a CLK signal to the CPU in the F body 30 (such as the FCPU 100).

DATA is a data signal line for data communication. CPU in F body 30 (FCPU10
0) to communicate with the LCPU 140
From CPU (FCPU100 etc.) in F body 30 to LCP
A DATA signal is output to U140. LCPU
140 to CPU in F body 30 (FCPU 100 etc.)
When performing communication with the CPU, the LCPU 140 transmits data to the CPU (FCPU 100, etc.) in the F body 30 by using DATA.
A signal is output. Note that GND is a ground line.

Next, an electric circuit on the interchangeable lens 40 side mounted on the F body 30 via the mount contact 130 will be described.

The mount contact 130 is connected to the interchangeable lens 4
LCP composed of microcomputer inside 0
Connected to U140. The LCPU 140 is for performing sequence control inside the interchangeable lens 40.

The LCPU 140 has a tele switch (TELE SW) 141 for zooming to the telephoto side.
(Corresponding to the tele switch 71 in FIG. 4), a wide switch (WIDE SW) for performing zooming to the wide angle side.
72 (corresponding to the wide switch 72 in FIG. 4).

The LCPU 140 includes a lens drive (LD) motor 143 for driving a focusing lens group (not shown) forward and backward in the optical axis direction for focusing, and a lens drive (LD) motor control circuit 14.
4, a lens drive (LD) pulse detection circuit 145 for detecting the drive amount of the LD motor 143 (the movement amount of the focusing lens group) increases the LD pulse from the LD pulse detection circuit 145. Lens drive (LD) counter 146 for counting down
Connected via From the count value of the LD counter 146, the absolute position of the focusing lens group can be known.

Further, a zooming (Z) motor 148 for driving a lens group (not shown) for zooming is connected to the LCPU 140 via a zooming (Z) motor control circuit 147. Z motor 1
48 drive amount (movement amount of lens group for zooming)
(Z) pulse detection circuit 14 for detecting
9 is connected via a zoom counter 150 for counting up / down the Z pulse from the Z pulse detection circuit 149. From the count value of the zoom counter 150, the absolute zooming position (corresponding to the focal length of the lens) can be known.

The LCPU 140 is connected to control the aperture mechanism 153 via a stepping motor control circuit 151 and a stepping motor 152. The aperture mechanism 153 is similar to the aperture mechanism 42 in FIG.

Next, FIG. 6 and FIG.
The control operation of the LCPU 140 in the interchangeable lens 40 will be described with reference to the timing charts (a) and (b).

FIGS. 6 and 7 show the LC in the interchangeable lens 40.
5 is a flowchart illustrating a control sequence of a PU 140.

The LCPU 140 in the interchangeable lens 40
It communicates with a CPU (such as the FCPU 100) in the body 30 to transmit and receive data.

FIG. 8A shows the FCPU in the F body 30.
6 is a timing chart illustrating an operation when communication is performed from 100 to the LCPU 140 in the interchangeable lens 40. Here, an example in which 8-bit data is transmitted three times is shown. The first data is command data indicating the type of communication. According to this data content, the interchangeable lens 4
The type of operation in the LCPU 140 within 0 is determined. 2
The third and third data are control data related to the command data. This control data has a different number of data depending on the type of command data. FIG. 8 (b)
From the LCPU 140 in the interchangeable lens 40 to the F body 3
6 is a timing chart for explaining an operation when performing communication with the FCPU 100 within 0.

At time T1, FC in F body 30
The PU 100 lowers the BREQL, and switches from the FCPU 100 in the F body 30 to the LCPU 14 in the interchangeable lens 40.
A communication request is made to 0. Next, at time T2, the LCPU 140 in the interchangeable lens 40
To respond to the communication request. Then, at time T3, the LCPU 140 in the interchangeable lens 40
Start LREQB.

Thereafter, from time T4 to time T5, the FCPU 100 in the F body 30 outputs signals of DATA and CLK at the timings shown in the figure, performs 8-bit data communication, and transmits command data. . Then
The control data 1 is transmitted between times T6 and T7. Further, control data 2 is transmitted between times T8 and T9.

Returning to the flowcharts of FIGS. 6 and 7,
The LCPU 140 is a CPU (FCPU) in the F body 30.
100, etc.), the CP in the F-body 30
Data communication is performed with U (FCPU 100 etc.). And
Data is input from the CPU in the F body 30, and a predetermined operation subroutine is called according to the data to execute the operation.

First, in step S1, it is determined whether there is a communication request from the F body 30. Here, it waits until there is a communication request, and if there is a communication request, it proceeds to step S2 to perform body communication.

Next, in step S3, the type of the command data obtained by the body communication is determined. If the type of the command data is "zoom enable", the process proceeds to step S4 to perform "zoom enable". This "zoom enable" is a state in which a zooming operation is possible.

The detailed operation of the subroutine "zoom enable" in step S4 will now be described with reference to the flowchart of FIG.

First, at step S41, TELE S
The state of W141 is monitored. Here, TELE SW
If 141 is on, the Z motor control circuit 147 and the Z motor 148 are operated. Then, the process proceeds to step S42 to start the TELE drive (zooming to the TELE side).

Next, in step S43, the count value of the zoom counter 150 is monitored, and based on the count value, it is determined whether or not the zooming mechanism is in contact with the TELE end. If it is at the TELE end, in a succeeding step S44, a short brake (Z motor short circuit) is applied to the Z motor 148, and further in a step S45,
The Z motor 148 is turned off (non-operating). And
In step S46, the status of the TELE SW 141 is monitored, and the process waits until the TELE SW 141 is turned off. Here, if it is turned off, the process proceeds to step S59.

If it is determined in step S43 that the zooming mechanism has not contacted the TELE end, the process proceeds to step S47. In this step S47, TELE
It is determined whether or not the SW 141 is on. Here, if the TELE SW 141 is on, the above step S
Returning to 43, if the TELE SW 141 is off, the process proceeds to step S48. Then, in step S48, a short brake (Z motor short circuit) is applied to the Z motor 148, and the Z motor 148 is turned off (non-operating) in step S49. Thereafter, the process proceeds to step S59.

On the other hand, in step S41, TE
If the LE SW 141 is off, the process advances to step S50 to monitor the WIDE SW 142. here,
If the WIDE SW 142 is on, the Z motor control circuit 147 and the Z motor 148 are operated, and step S5
At 1, the WIDE drive (zooming to the WIDE side) is started.

Next, in step S52, the count value of the zoom counter 150 is monitored, and based on the count value, it is determined whether or not the zooming mechanism is in contact with the WIDE end. Here, the zooming mechanism is WID
When it is applied to the E end, the process proceeds to step S53,
A short brake (Z motor short-circuit) is applied to the Z motor 148, and the Z motor 148 is turned off (non-operating) in step S54. Then, in step S55, the state of the WIDE SW 142 is monitored to
The process waits until the DE SW 142 is turned off, and if it is turned off, the process proceeds to step S59.

If it is determined in step S52 that the zooming mechanism is not in contact with the WIDE end, the process proceeds to step S56. Then, in step S56,
Monitor WIDE SW142. Here, WIDE
If the SW 142 is on, the process returns to the step S52,
If it is off, the process proceeds to step S57 to apply a short brake (Z motor short circuit) to the Z motor 148. Next, in step S58, after the Z motor 148 is turned off (non-operating), the process proceeds to step S59.

In step S59, the CP in F body 30
If there is a communication request from U, the process returns to step S2 of the flowchart in FIG. 6, and if there is no communication request, the process returns to step S41.

Returning to the flowchart of FIG.
If the type of the command data is not "zoom enable" in step 3, the flow advances to step S5 to determine whether or not the command data is "subroutine write". If the command data is "write subroutine", the process proceeds to step S6 and "write subroutine".
I do. This “subroutine write” is performed by the FCPU 1 in the F body 30 by the body communication in the step S2.
The additional program data obtained from 00 is written into a custom program memory area, described later, of the LCPU 140 in the interchangeable lens 40.

FIG. 10 is a diagram showing a memory structure inside LCPU 140.

FIG. 10A shows the structure of a ROM area (read only memory) 160, and an area 161 is an area where communication and other programs are stored.
Areas 162 to 167 are areas in which various subroutine programs are stored.

The ROM area 160 is a mask ROM.
The CPU is built in a program step at the time of manufacturing, and the contents cannot be added or modified after the manufacturing.

FIG. 10B shows the structure of a RAM (random access memory) area 170.
The M area 170 is an electrically writable area.

The area 171 is an operation / data area in the RAM, and is used for storing data to be temporarily stored and operation data in various sequences. Further, the regions 172 to 174 correspond to the CPs in the F body 30.
This is a custom program memory area for storing the additional program data transmitted from U. These program data are custom program data for variously changing the control inside the lens according to the specifications of the body. It comprises three types of custom program memory areas (options 1 to 3) 172 to 174.

The memory structure includes a ROM area 160, a RAM
The addresses are mapped on the same address bus line through the entire area 170, and the addresses are arranged from top to bottom in FIGS. 10 (a) and 10 (b).

The three types of custom programs (options 1 to 3) correspond to step S33 in the flowchart of FIG.
As shown in S35 and S37, the subroutine is in the entire sequence, and the subroutines of the above options 1 to 3 can be called according to command data from the CPU in the camera body. These three types of custom program areas are interchangeable lens 4
At the stage of manufacturing 0, no meaningful data is written, but when a predetermined type of camera body is attached to the interchangeable lens 40, additional program data is transmitted from the CPU in the body. Written to the custom program memory area.

Returning to the flowchart of FIG. 6, if "subroutine writing" is not performed in step S5, the process proceeds to step S7, where the command data is set to "A".
It is determined whether or not “V narrowing down” is performed. Here, if the command data is “AV narrowing down”, “AV narrowing down” is performed in the subsequent step S8. AV narrowing down,
In FIG. 5, the stepping motor control circuit 151 and the stepping motor 152 are operated to
3 is narrowed down.

That is, in the body communication in step S2, the control data 1 subsequent to the command data is data corresponding to the number of steps to be narrowed down from the open state, and narrowing down is performed according to this data. Step S8
After the end of the process, the process proceeds to step S9 to communicate with the F body 30, and sends command data indicating the end of the AV narrowing down to the CPU in the F body 30.

If "AV narrowing down" is not performed in step S7, it is determined in step S10 whether or not the command data is "AV closing".
If the command data is "AV close", "AV close" is performed in the next step S11.
The “AV close” is an operation of narrowing the aperture down to the fully closed state regardless of the current aperture state.

That is, in FIG. 5, the stepping motor control circuit 151 and the stepping motor 152 are operated to stop down the stop mechanism 153, thereby stopping down to the fully closed state. Then, after the "AV closing" is completed, communication with the F body 30 is performed in step S12, and command data indicating the end of the AV closing is sent to the CPU in the F body 30.

If it is determined in step S10 that the state is not "AV closed", then in step S13,
It is determined whether or not the command data is “AV release”. Here, when the command data is “AV release”,
In the following step S14, "AV release" is performed. The “AV release” is an operation of opening the aperture to a fully open state regardless of the current aperture state.

That is, in FIG. 5, the stepping motor control circuit 151 and the stepping motor 152 are operated to open the aperture mechanism 153, and the aperture mechanism 153 is opened to the fully opened state. After the “AV release” is completed, communication with the F body 30 is performed in step S15, and command data indicating the end of the AV release is sent to the CPU in the F body 30.

If it is determined in step S13 that the command is not "AV release", the flow advances to step S16 to determine whether the command data is "LD drive". Here, in the case of “LD drive”, “LD drive” is performed in the following step S17. This “LD drive” is performed by controlling the drive of the LD motor control circuit 144 and the LD motor 143 in FIG.

That is, the “LD drive” is performed by designating the drive direction of the LD drive and the LD drive amount with the 2-byte data of control data 1 and control data 2 following the command data. Then, after the “LD driving” ends, the process proceeds to step S18 to perform the body communication, and sends command data indicating the end of the LD driving to the CPU in the F body 30.

If it is determined in step S16 that the command data is not "LD drive", the flow advances to step S19 to determine whether or not the command data is "LD counter read". Here, if the command data is “read LD counter”, then in step S20,
“Read LD counter” is performed. This “read LD counter” reads the count value of the LD counter 146.
After the “read LD counter” is completed, step S
In step 21, the body communication is performed, and the command data indicating the end of the "reading of the LD counter" and the value of the LD counter 146 are sent as the control data 1.

If it is determined in step S19 that the command data is not "LD counter read", then in step S22 the command data is "zoom drive".
Is determined. If the command data is "zoom drive", the process proceeds to step S23 to perform "zoom drive". This “zoom drive” corresponds to Z in FIG.
This is performed by controlling the motor control circuit 147 and the Z motor 148.

That is, "zoom drive" is performed by designating the drive direction of zoom drive and the amount of zoom drive using 2-byte data of control data 1 and control data 2 following the command data. Then, after the "zoom drive" ends, in step S24, body communication is performed, and command data indicating the end of the zoom drive is sent to the CPU in the F body 30.

If it is not "zoom drive" in step S22, the flow advances to step S25 to determine whether or not the command data is "read zoom counter". If the command data is "read zoom counter", the count value of the zoom counter 150 is read by "read zoom counter" in the subsequent step S26. After the “reading of the zoom counter” is completed, the body communication is performed, and command data indicating the completion of the reading of the zoom counter and the value of the zoom counter as control data 1 are sent.

If it is not "read zoom counter" in step S25, the flow advances to step S28 to determine whether or not the command data is "read body ID number". If the command data is "read body ID number", the flow advances to step S29 to perform body communication, and sends the body ID number read command data and the body ID number as control data 1. This body ID number is stored in the RAM area 1 in the LCPU 140.
The data is read from the 70 calculation data area 171.

If the command data is not "body ID number read" in step S28, then in step S30, the command data is changed to "body ID number".
It is determined whether or not "write number". Here, when the command data is “write body ID number”, the body ID number sent from the body following the command data is written into the operation data area 171 of the RAM area 170 inside the LCPU 140. Next, step S3
In 1, body communication is performed, and command data indicating the end of ID writing is sent to the CPU in the F body 30.

On the other hand, if the command data is not "write body ID number" in step S30, then in steps S32, S34 and S36 of the subsequent condition determination,
It is determined whether the command data is each of options 1 to 3 or not. Then, the above steps SS32 and S3
4. If the options are 1 to 3 in S36, respectively, the process proceeds to steps S33, S35, and S37, and the options 1 to 3 are performed.

Further, steps S6, S9, S12,
S15, S18, S21, S24, S27, S29, S
After the end of 31, S33, S35, and S37, and if the determination in step S36 is "NO", the process returns to step S1.

Next, the operation sequence of the FCPU 100 in the F body 30 will be described with reference to the flowchart of FIG.

First, initialization is performed in step S61,
In a succeeding step S62, it is determined whether or not the interchangeable lens 40 is mounted on the F body 30. Here, when the interchangeable lens 40 is not mounted, the process shifts to a lensless sequence. In step S62, the interchangeable lens 40
If it is determined that the first release switch (1R SW) 10 is mounted in step S63.
Monitor 9

In this step S63, 1R SW10
If it is determined that No. 9 is off, the flow proceeds to step S64 to perform lens communication, and sends command data of “zoom enable” to the interchangeable lens 40. As a result, the interchangeable lens 40
On the side, zooming operation is enabled. Next, in step S65, the mode setting switch (SW) 108 is monitored. Here, if the mode setting SW 108 is on, a mode change process is performed in a succeeding step S66. Then, the process returns to step S63. If the mode setting SW 108 is off in step S65, the process returns to step S63.

In the above step S63, 1R SW
If the switch 109 is on, the process proceeds to step S67 to perform lens communication and perform “read zoom counter”. The value of the zoom counter (the focal length of the interchangeable lens) is used for exposure calculation described later. Then, in step S68, lens communication is performed, and "reading of LD counter" is performed.

Next, in step S69, photometry is performed using the photometry sensor 104 and the photometry processing circuit 105 in FIG. Subsequently, an exposure calculation is performed in step S70.
Here, the aperture value (AV value) to be controlled and the shutter speed (TV value) to be controlled are determined from the photometry result, the photographing mode, the film sensitivity, the value of the zoom counter, and the like according to a predetermined arithmetic expression.

In step S71, distance measurement is performed using the AF sensor interface circuit 119 and the AF sensor 120. Then, in step S72, the lens drive amount (LD drive amount) of the interchangeable lens 40 is obtained based on the focus shift amount obtained by the distance measurement. Further, step S
At 73, lens communication (LD driving) is performed, and LD driving is performed inside the interchangeable lens 40.

Next, in step S74, the second release switch (2R SW) 110 is monitored. Here, if the 2R SW110 is not on, the process proceeds to step S75 to monitor the 1R SW109.
If the 1R SW 109 is on, the above step S
Returning to step 74, if the 1R SW 109 is off, the process returns to step S63.

In step S74, 2R SW
If 110 is on, the process proceeds to step S76 to determine whether the LD drive in the interchangeable lens 40 has been completed. If the LD drive in the interchangeable lens 40 has been completed in step S76, the process proceeds to step S77. Whether or not the LD drive in the interchangeable lens 40 has been completed can be determined by the presence or absence of communication (LD drive end) from the interchangeable lens 40.

In step S77, mirror up is started to switch the light transmitted through the photographing lens from the finder optical system to the film surface side. The mirror up is performed using the mirror S charge control circuit 116 and the mirror S charge motor 117 in FIG.

Next, in step S78, lens communication (AV focusing) is performed. In this lens communication (AV aperture reduction), command data for AV aperture reduction,
Control data corresponding to the number of stops is sent to the interchangeable lens 40. In response to this communication, the interchangeable lens 40 performs “AV narrowing”.

Thereafter, in steps S79 and S80, the process waits for the aperture stop in the interchangeable lens 40 and the end of the mirror up in the F-body 30, and if both ends, the flow advances to step S81 to expose. I do. It should be noted that the determination of the end of the AV narrowing down in step S79 is made based on the presence or absence of communication from the lens (end of the AV narrowing down).

In the exposure in step S81, the front curtain control magnet 112 and the rear curtain magnet 113 of the focal play shutter are controlled to a predetermined time (step S7).
(According to the TV value determined by the exposure calculation of 0). Next, in step S82, mirror down is started to return the light transmitted through the photographing lens from the film surface side to the finder optical system.

Next, in step S83, lens communication (AV release) is performed, and AV release is performed in the interchangeable lens 40. Further, in steps S84 and S85, the process waits for the AV opening in the interchangeable lens 40 and the end of the mirror down in the F body 30.

If both are completed in steps S84 and S85, the flow advances to step S86 to charge the shutter. This shutter charge is performed by the mirror S charge control circuit 116 and the mirror S charge motor 117.
Is controlled by driving. Further, in step S87, the film is wound up. This film winding is performed by driving and controlling the winding and rewinding control circuit 114 and the winding and rewinding motor 115. After completion of the winding, the above step S63
Return to

FIG. 12 shows a camera body (D
FIG. 2 is a block diagram of an electrical system showing a configuration in which an interchangeable lens 40 is mounted on a (body) 50. Note that the same components as those in the block diagram of FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 12, a DCPU 180 on the camera body (D body) 50 side of the imaging device is constituted by a microcomputer, and performs sequence control inside the D body 50. The DCPU 180 has an image monitor 18 for visually confirming captured image data.
1 is connected via an image monitor control circuit 182, and a mirror motor 183 for controlling the up and down movement of the quick return mirror 31 is connected via a mirror control circuit 184 for controlling the drive of the mirror motor 183. Connected.

Further, the DCPU 180 has a CCD for obtaining photographed image data via a CCD control circuit 184.
An image sensor 185, an image processing circuit 186 for processing an output signal from the CCD image sensor 185, and an image recording circuit 187 are connected. The image processing circuit 186 performs processes such as A / D conversion, color conversion, and data compression on the output signal. The image recording circuit 187 is a circuit for recording the image data output from the image processing circuit 186 on an image data recording medium 188 mounted inside the camera.

Next, referring to the flowcharts of FIGS. 13 and 14, the interchangeable lens 40 mounted on the D body 50 will be described.
The control operation of the LCPU 140 will be described.

The interchangeable lens described here is the same as the interchangeable lens 40 shown in FIG.
And the same as that described in the flowchart of FIG. However, when the interchangeable lens 40 is mounted on the D body 50, an additional program is received from the D body 50, and the specifications of the interchangeable lens 40 are changed to specifications that match the characteristics of the D body 50.

Then, steps S101 to S132 and step S134 in the flowcharts of FIGS.
Steps S137 to S137 are the same as steps S1 to S32 and steps S34 to S37 in the flowcharts of FIGS. Option 1 in step S132 as an additional program (subroutine)
In step S133, "zoom + electronic zoom enable" is executed in step S133. Then, step S1
Return to 01.

FIG. 15 is a flowchart for explaining the operation of transmitting the above-mentioned additional program from the D body 50 to the interchangeable lens 40.

As shown in FIG. 15, the timing at which the additional program is transmitted from the D body 50 to the interchangeable lens 40 is when the power switch of the D body 50 is turned on (when power is turned on) and when the interchangeable lens 40 is attached. Time and when the power saving mode is released. D body 50
After the power is turned on, if the photographer does not perform any operation for a predetermined time, the camera automatically enters a power saving mode in order to reduce current consumption. To release the power saving mode, the power saving mode is automatically released by operating the release switch or the mode setting SW 108, or by attaching or detaching the interchangeable lens 40.

First, in step S141, initialization is performed after power-on. Then, in step S146, lens communication is performed, and subroutine writing (writing of an additional program) is performed. Then, lens communication is performed in step S147, and the body ID number is written. Thereafter, the process proceeds to step S148 to enter a camera sequence.

When the interchangeable lens 40 is mounted on the D body 50, the DCPU 180 detects the mounting of the interchangeable lens 40, and proceeds to step S146 described above.

When the power saving mode is canceled,
In step S142, lens communication is performed, and the interchangeable lens 4
The body ID number stored in the RAM area 170 in 0 is read. Next, in step S143, reading determination of the ID number is performed. Here, if the ID number cannot be read, it is determined that the interchangeable lens 40 is not attached, and the process enters the demonstration sequence of step S144.

On the other hand, if the ID number can be read in step S143, the flow advances to step S145 to check whether the current body ID number matches the body ID number received from the interchangeable lens 40. Here, if they match, it is determined that the correct additional program has been written in the LCPU 140 in the interchangeable lens 40, and the flow advances to step S148 to execute the camera sequence.

If it is determined in step S145 that the body ID numbers do not match, it is determined that the correct additional program has not been written in the LCPU 140 in the interchangeable lens 40, and the flow advances to step S146. .

FIG. 16 is a flowchart for explaining the operation of the subroutine "zoom + electronic zoom enable" in step S133 of the flowchart of FIG.

Incidentally, step S in the flowchart of FIG.
151 to S158, steps S154 to S156, and steps S165 to S174 correspond to steps S41 to S45 and steps S47 to S4 in the flowchart of FIG. 9, respectively.
9, Steps S50 to S59 are the same as those described above, and thus description thereof is omitted.

If it is determined in step S153 that the zooming mechanism is in contact with the TELE end, step S15
At 7, the short brake is applied to the Z motor 148. Next, in step S158, the Z motor 148 is turned off. Thereafter, in step S159, 300
Start the msec timer.

Next, in step S160, TEL
The E SW 141 is monitored. Here, TELE SW
If 141 is in the ON state, the process proceeds to step S161 and 3
The elapsed time of the 00 msec timer is monitored. And
If 300 msec has not elapsed, the above step S1 is performed.
Returning to step 60, if 300 msec has elapsed, the process proceeds to step S162 to perform body communication (start of electronic zoom).

This camera body is an electronic camera body (D
The body 50) has an electronic zoom function in addition to an optical zoom function. Electronic zoom refers to performing electronic trimming on an image output to obtain an image with an angle of view on the telephoto side that is higher than the optical TELE end.

Next, in step S163, TEL
The E SW 141 is monitored. Here, TELE SW
If 141 is on, the process returns to step S162, where TE
If the LESW 141 is off, the flow advances to step S164 to perform body communication (end of electronic zoom). Step S
If the TELE SW 141 is not on at 160, and after the end of step S164, the process proceeds to step S174.

FIG. 17 shows the DCPU 18 in the D body 50.
6 is a flowchart for explaining the operation of No. 0.

Steps S181 to S183, steps S187 and S188, and steps S189 to S20
4. Steps S208 to S210 correspond to steps S61 to S63 and step S
65 and S66, steps S67 to S82, step S
Since the content is the same as 83 to S85, the description is omitted.

In step S183, 1R SW1
If 09 is off, lens communication is performed in step S184, and "zoom + electronic zoom enable" is transmitted. Then, in a step S185, it is determined whether or not there is communication from the lens. If there is communication from the lens, the communication is communication relating to electronic zoom. That is, since the communication indicates the start of the electronic zoom or the end of the electronic zoom, the process proceeds to step S186 to perform the electronic zoom processing.

In this electronic zoom processing, a predetermined trimming coefficient corresponding to the electronic zoom operation information from the interchangeable lens 40 is generated and stored. Then, when storing the image data after photographing in the image recording medium later, the image data is stored in a form incorporating the trimming factor.

After the aperture stop in the interchangeable lens 40 and the mirror up in the D body 50 are completed in steps S201 and S202, exposure is performed in step S203. Exposure in the case of the D body 50 is performed using the electronic shutter function of the CCD image sensor 185. That is, exposure is performed by electrically controlling the charge storage time of the CCD according to the shutter time obtained in step S194.

Next, when mirror down is completed in step S204, lens communication (AV
(Close), and the closing operation of the aperture in the interchangeable lens 40 is started. Then, in step S206, it is determined by the communication from the interchangeable lens 40 whether or not the AV closing is completed.

Here, if it is confirmed that the AV is closed, the flow advances to step S207 to transfer the charge of the CCD. At this time, since the aperture in the interchangeable lens 40 is closed, the CCD
Light is not irradiated on the light receiving surface of the image sensor 185. Therefore, no smear occurs during CCD transfer. The subsequent steps S208 to S210 are performed as described above with reference to FIG.
Are the same as steps S83 to S85 in the flowchart of FIG.

Next, in step S211, image processing such as image compression is performed by the image processing circuit 186. Further, in step S212, using the image recording circuit 187,
The image data and the electronic zoom information are stored in the image recording medium 188. Thereafter, the process returns to step S183.

As described above, at the time of designing the interchangeable lens 40, the interchangeable lens 4 is set in accordance with the electronic camera body 50.
Even if it is not considered that the electronic zoom function is included in the interchangeable lens 40, the electronic camera body 50 sends an additional program to the interchangeable lens 40 to
The additional program is stored in the RAM of the LCPU 140 in the system so as to correspond to the specification of the electronic zoom.

FIGS. 18 and 19 are flowcharts illustrating the control operation of the LCPU in the interchangeable lens when the interchangeable lens is mounted on the digital movie body (video camera).

Steps S221 to S252, S254, S256, and S257 of the flowcharts of FIGS. 18 and 19 are the same as steps S1 to S32, step S34, steps S36, and S37 of the flowcharts of FIGS. Therefore, the description is omitted.

This control sequence includes an additional program from the digital movie body. That is, “zoom + electronic zoom enable” in step S253 and “AV step release” in step S255 are added.

The operation of “zoom + electronic zoom enable” in step S253 is the same as the operation in step S133 in the flowchart of FIG. 14, and a description thereof will be omitted.

On the other hand, "opening the AV step" in step S255 is an operation of opening the aperture by a predetermined number of steps. In the case of a digital movie, an auto iris function for opening and closing the aperture for a while while capturing a moving image is effective. However, when the interchangeable lens was designed, no consideration was given to providing an auto iris function in the interchangeable lens. Therefore, the LCPU of the interchangeable lens 40
“AV step release” was not provided as a subroutine in 140.

On the other hand, in the present embodiment, an additional program is sent from the digital movie body to the interchangeable lens, and the additional program is stored in the RAM of the LCPU in the interchangeable lens, so as to comply with the specifications of the auto iris. I have.

The present invention can be applied to various modifications. For example, there are various types of interchangeable lenses, and there is also an interchangeable lens having no zooming function such as a single focus lens. In such an interchangeable lens, even if it is connected to the electronic camera body as in the above embodiment, the interchangeable lens cannot have the function of electronic zoom. Therefore, it is meaningless to write an additional program corresponding to the electronic zoom in the interchangeable lens.

Therefore, when the interchangeable lens is attached,
Receive the ID number of the interchangeable lens from the interchangeable lens, select an additional program necessary for the interchangeable lens,
You may make it transmit to an interchangeable lens.

Further, in the above embodiment, the present invention is applied to the interchangeable lens as an accessory, but may be applied to other accessories connected to the camera body, for example, a flash.

The RAM is used as a custom program area for storing additional program data of accessories. However, the present invention is not limited to this, and another electrically writable memory such as a flash ROM or an EEPROM may be used. Absent.

According to the above embodiment of the present invention, the following configuration can be obtained.

(1) Communication means for communicating with the mounted camera body unit and receiving data output from the camera body, and at least a part of which can be rewritten or additionally written, and the operation control program A stored program memory, command execution means for executing a command stored in the program memory in response to data received from the camera body unit, and a call in response to data received from the camera body unit An accessory unit for use in a camera system, comprising: a memory area constituting at least a part of a program memory, wherein the memory area comprises a custom program area whose contents can be rewritten or additionally written in accordance with the received data.

(2) The accessory unit used in the camera system according to (1), wherein the custom program memory area is a random access memory.

(3) The accessory unit used in the camera system according to (1), further comprising ID data storage means for holding ID data indicating a type of a mountable camera body unit.

(4) A mounting detection means for detecting mounting of an accessory unit and outputting a mounting detection signal, and writing a control program into a custom program area provided in the accessory unit and capable of rewriting or additionally writing the contents. Additional program memory for storing additional program data, communication means for transmitting data to the attached accessory unit, and transferring the additional program data to the communication means in response to the attachment detection signal. A camera body unit for use in a camera system, comprising: a program writing / executing unit.

(5) Means for storing ID data which is an identification code for each unit in the camera system, communication means for transmitting data to the attached accessory unit, and provided in the accessory unit. An additional program memory for storing an additional program data for writing a control program in a custom program area in which contents can be rewritten or additionally written, and an attachment detecting means for detecting attachment of an accessory unit and outputting an attachment detection signal; A camera body unit used in a camera system, comprising: a program writing / executing unit that transfers the additional program data and the ID data to the communication unit in response to a mounting detection signal.

(6) Control means for controlling the camera operation sequence, means for storing ID data which is an identification code for each unit in the system, and output of a mounting detection signal by detecting mounting of an accessory unit. A mounting detection means, an additional program memory provided in the accessory unit, and an additional program memory for storing additional program data for writing a control program in a custom program area in which the contents can be rewritten or additionally written; Communication means for transmitting data, and communication with the attached accessory unit via the communication means, and the ID transmitted from the accessory unit;
Reading the data, comparing the data with the data stored in the storage means, and determining whether or not there is matching data; the ID data determining means; and the communication means, when the ID data determining means determines that there is no matching data. A camera body unit for use in a camera system, further comprising: a program writing / executing means for transferring the additional program data and its own ID data.

(7) The present invention is applied to a camera system including a plurality of types of camera body units and an accessory unit which can be commonly used by the plurality of camera body units, and each unit is provided with an identification code indicating the type. A camera body unit capable of performing two-way communication with the accessory unit when the accessory unit is mounted; and determining the identification code of the accessory unit, and determining the identification code of the accessory unit according to the determination result. Means for transferring predetermined data for controlling the accessory unit to the accessory unit via the camera body unit.

(8) Applicable to a camera system that includes a plurality of types of camera body units and an accessory unit that can be commonly used by the plurality of camera body units, and each unit is provided with an identification code indicating the type. A possible accessory unit, a communication means for performing bidirectional communication with the mounted camera body, a storage means for storing predetermined data relating to control transferred from the camera body, and the predetermined data being stored in the storage means. An accessory unit for recognizing the predetermined data as a part of the program data and controlling operation of the accessory unit in accordance with the program data.

(9) A camera system including a plurality of types of camera body units and accessory units that can be commonly used by the plurality of camera body units, and each unit is provided with an identification code indicating the type. When the accessory unit is attached, the first communication means for performing two-way communication with the accessory unit and the identification code of the accessory unit are determined, and the first communication means is determined in accordance with the determination result. A camera body unit having means for transferring predetermined data for controlling the accessory unit to the accessory unit via the camera body; a second communication means for performing bidirectional communication with the mounted camera body; Storage means for storing predetermined data relating to control transferred from the unit, and And an accessory unit having control means for recognizing the predetermined data as a part of the program data when the predetermined data is stored, and controlling operation of the accessory unit in accordance with the program data. Camera system.

[0154]

As described above, according to the present invention, a general-purpose microcomputer is used only without using a special microcomputer on the camera side.
An accessory unit and a camera body unit used in a camera system capable of modifying a part of a microcomputer program in an accessory in correspondence with a camera having a new function can be provided.

Even if a camera with a new function that is not taken into consideration at the stage of designing the camera system is newly developed, an additional program can be added to the accessory program simply by attaching the accessory of the old system to the camera of the new function. Since writing can be performed, a sequence according to the specifications of the camera having the new function can be performed, and therefore, a versatile camera system can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a concept of the present invention and showing a configuration of a camera system.

FIG. 2 is a cross-sectional view showing the configuration of the first embodiment of the present invention and showing a state in which an interchangeable lens as an accessory device is mounted on a camera body for a silver halide film.

FIG. 3 is a cross-sectional view showing the configuration of the first embodiment, showing a state in which an interchangeable lens as an accessory device is mounted on a camera body for an imaging device.

FIG. 4 is a perspective view showing a state in which an interchangeable lens 40 is mounted on a camera body 30 made of a silver halide film.

FIG. 5 is an electrical block diagram showing a configuration in which an interchangeable lens 40 is mounted on a camera body 30 for a silver halide film.

FIG. 6 is a flowchart showing a control sequence of an LCPU 140 in the interchangeable lens 40.

FIG. 7 is a flowchart showing a control sequence of an LCPU 140 in the interchangeable lens 40.

8A is a timing chart illustrating an operation when communication is performed from the FCPU 100 in the F body 30 to the LCPU 140 in the interchangeable lens 40. FIG. 8B is a timing chart illustrating the operation from the LCPU 140 in the interchangeable lens 40 to the F body 30. F within
5 is a timing chart illustrating an operation when communicating with the CPU 100.

FIG. 9 is a flowchart illustrating a detailed operation of a subroutine “zoom enable” in step S4 of the flowchart in FIG. 6;

10A and 10B show a memory structure inside an LCPU 140. FIG. 10A shows a ROM area (read only memory) 1
FIG. 6B shows the structure of a RAM (random access memory) area 170. FIG.

FIG. 11 is a flowchart illustrating an operation sequence of the FCPU 100 in the F body 30.

FIG. 12 shows a camera body (D body) 50 for an imaging device.
FIG. 2 is a block diagram of an electrical system showing a configuration in which an interchangeable lens 40 is mounted.

FIG. 13 is a flowchart showing a control sequence of the LCPU 140 in the interchangeable lens 40 mounted on the D body 50.

FIG. 14 is a flowchart showing a control sequence of an LCPU 140 in the interchangeable lens 40 mounted on the D body 50.

FIG. 15 is a flowchart illustrating an operation of transmitting the above-described additional program from the D body 50 to the interchangeable lens 40.

FIG. 16 is a step S133 in the flowchart of FIG. 14;
Is a flowchart for explaining the operation of a subroutine "zoom + electronic zoom enable" in FIG.

17 is a flowchart illustrating an operation of a DCPU 180 in a D body 50. FIG.

FIG. 18: Digital movie body (video camera)
And the LC inside the interchangeable lens when the interchangeable lens is attached
It is a flowchart explaining the control operation of PU.

FIG. 19: Digital movie body (video camera)
And the LC inside the interchangeable lens when the interchangeable lens is attached
It is a flowchart explaining the control operation of PU.

[Explanation of symbols]

 1 camera body, 2 accessory device, 11, 21 communication unit, 13, 22 control unit, 23 subroutine execution unit, 24 fixed program area, 25 program writing unit, 26 additional program area, 30 camera body for loading silver halide film (F Body), 31 quick return mirror, 34 eyepiece, 35 submirror, 36 AF module, 37 focal plane shutter (shutter), 38 silver halide film, 40 interchangeable lens, 41 photographing lens, 42, 153 aperture mechanism, 43, 152 stepping Motor, 50 Camera body for imaging device (D body), 51 Optical filter, 52 CCD imaging device, 61 Release button (release switch), 62 Display device, 63, 108 Mode setting switch, 64, 73 Mount, 65, 74 Electrical contact, 71, 141 Tele switch (TELE SW), 72, 142 Wide switch (WIDE SW), 100 FCPU, 101 DC / DC converter, 102 power switch (SW), 103 power battery, 104 photometric sensor, 105 photometric process Circuit, 106 display element, 107 display control circuit, 109 first release switch (1RSW), 110 second release switch (2RSW), 111 shutter control circuit, 112 front curtain control magnet, 113 rear curtain control magnet, 114 winding rewind control circuit , 115 winding and rewinding motor, 116 mirror shutter S charge control circuit, 117 mirror shutter S charge motor, 118 film sensitivity reading circuit, 119 AF sensor interface circuit, 120 AF Sensor, 130 mount contact point, 140 LCPU, 143 lens drive (LD) motor, 144 lens drive (LD) motor control circuit, 145 lens drive (LD) pulse detection circuit, 146 lens drive (LD) counter, 147 zooming (Z) Motor control circuit, 148 zooming (Z) motor, 149 zooming (Z) pulse detection circuit, 150 zoom counter, 151 stepping motor control circuit, 160 ROM area, 170 RAM area, 180 DCPU, 181 image monitor, 182 image monitor control circuit 183 mirror motor, 184 mirror control circuit, 185 CCD image pickup device, 186 image processing circuit, 187 image recording circuit, 188 image data recording medium.

Claims (3)

[Claims] A communication means for communicating with a mounted camera body unit and receiving data output from the camera body, at least a part of which is rewritable or additionally rewritable, and stores an operation control program. Command memory for executing a command stored in the program memory in response to data received from the camera body unit, and the program called in response to data received from the camera body unit An accessory unit used in a camera system, comprising: a memory area constituting at least a part of a memory, wherein the memory area includes a custom program area whose contents can be rewritten or additionally written in accordance with the received data. 2. The custom program memory area,
The accessory unit used in the camera system according to claim 1, wherein the accessory unit is a random access memory. 3. A mounting detection means for detecting mounting of an accessory unit and outputting a mounting detection signal, and for writing a control program in a custom program area provided in the accessory unit and capable of rewriting or additionally writing the contents. An additional program memory for storing the additional program data, communication means for transmitting data to the attached accessory unit, and a program for transferring the additional program data to the communication means in response to the attachment detection signal A camera body unit for use in a camera system, comprising: a writing execution unit.