JP2540823B2 - camera - Google Patents

Description

Description: TECHNICAL FIELD The present invention is input by inputting information (data) necessary for operating a camera or performing actual shooting to the camera from outside the camera using an accessory. The present invention relates to a camera capable of controlling the camera based on the information obtained.

[Prior Art and its Problems] In recent years, unless a person skilled in the art could effectively utilize, a high-performance single-lens reflex camera or the like is equipped with a microcomputer, and the microcomputer controls the drive of the taking lens to take an image. An autofocus single-lens reflex camera that automatically moves the lens to the in-focus position has been put to practical use, which has caused a great reaction to people who had previously given up as unusable because it was difficult to operate. .

In this way, the system that enables automatic electronic control of the camera is epoch-making in that it has expanded the customer base of single-lens reflex cameras, and the demand for such automatically controlled cameras is increasing. It is considered to be a thing.

By the way, this kind of automatic electronic control camera is required to have many functions in order to cope with the expansion of the customer base. That is, the camera must be able to satisfy the requirements of each person, from the expert to the beginner.

As described above, in the automatic electronic control of the camera, it is required to have many functions in order to meet various needs, but the operation for selecting each function becomes complicated, and the operation by the automatic electronic control is complicated. There is generally a problem that the maximum merit of facilitating the process may be lost.

From this point of view, the ROM (code) board can be mounted on the camera, and by mounting this ROM board on the camera, * determination of exposure mode * determination of necessity of viewfinder display * when the number of films is running low A camera has been proposed in which a specific function that meets the needs of the user is selectively designated from many functions of the camera such as whether or not a warning is necessary (see Japanese Patent Laid-Open No. 54-107339). ).

This method is intended to simplify and facilitate the operation by mounting a ROM board on the camera and selectively specifying many functions of the camera.

However, although the above method of holding all expected functions in advance and selecting a specific function from them is a big attraction for users in a sense, I understood the contents of functions that are not very necessary for users. In addition, it is a heavy burden to use in order to select or specify each function.

[Object of the Invention] The present invention has been made in view of the problems of the above-mentioned conventional multi-functionalization, and it is possible to successively add functions corresponding to various needs of users, and The basic purpose is to provide a camera that can accurately meet the needs of users, and more specifically, it is usually configured to achieve a predetermined function and, for example, the ROM board described above. By adding the functions of the camera with various accessories, and when such additions are made, the function can be executed and the display related to the function can be displayed, so that only the function necessary for the main body for the user is provided. It is an object of the present invention to provide a camera that can be settable and that can notify a user of a settable function.

[Configuration of the Invention] In order to achieve the above object, the present invention is a camera in which an accessory capable of outputting data relating to the function of a camera loaded with a film can be attached and a predetermined function can be achieved. Function control means for executing the predetermined function, display means for displaying information on the function in association with the execution of the predetermined function, and reading means for reading the output data when the accessory is attached to the camera And, according to the content of the read data,
The function control means is capable of executing the function when the function is added, and the display means displays the function before the function is added. The predetermined function is displayed, and when the function is added, the function added in addition to the predetermined function can be displayed.

Therefore, in the present invention, the camera has only a predetermined function, and the function can be executed only when the function is added by the accessory.
The display regarding the function comes to be performed.

[Embodiment] An embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

<Camera Configuration> FIG. 2 is a rear perspective view of the camera according to the present embodiment, in which a liquid crystal display device (1) for displaying photographing information is provided on the upper surface of the camera body. A switch section (2) having a total of four mode setting switches (2-1, 2-2, 2-3, 2-4) is provided on the other side of the finder. The switch section (2) is provided with, for example, a pair of upper and lower electrodes on the liquid crystal display pattern, with a total of four pairs of spacers, and each switch (2-1 to 2-4).
It is preferable that the pressed switch is turned on when any one of them is lightly pressed. A release button (3) and an up / down switch (Sup, Sdn) for changing the value of the numerical data displayed on the liquid crystal display device (1) are provided on the side of the liquid crystal display device (1). Has been. Further, a program switch (7) for directly setting the program exposure mode is provided on the upper portion of the camera body on the case back side.

As clearly shown in FIG. 3, the IC card (4) on which the necessary programs or data are written is inserted into the holder (5) provided on the front surface of the camera body and set. There is. As the IC card (4), for example, there are three types of exposure program cards (type A and type B), mode setting change cards, and demonstration cards as described below, which are required by the user. In response to the
Insert the IC card (4) and set it. IC card (4)
A basic structure in which an electrode group (4a) provided in the lower part and an IC (4c) which is built in on the upper side of the electrode group (4a) and which stores a program or data are formed on a single substrate. Have

In FIG. 3, (6) is an aperture change switch for changing the aperture when the manual mode is selected. The switch (6) is turned on to operate the up and down switches (Sup, Sdn). By doing so, the aperture can be changed.

FIG. 4 shows a block diagram of a control circuit for controlling the camera. In FIG. 4, (E) is a battery as a power source, (D)
1) is a diode for preventing reverse charge, (C) is a backup capacitor, (R _R ) and (C _R ) are reset resistors and capacitors, (Tr1) is a power supply transistor, (μC) is sequence control of the camera body, A microcomputer that performs various control calculations (hereafter referred to as a microcomputer), and has an internal E ² PROM (electrically erasable PROM) and a booster circuit for creating the voltage required for writing. (AE) is an exposure control circuit that controls the exposure based on the exposure data from the microcomputer (μC). (LM) is a photometric circuit, and (DX) is a film sensitivity automatic reading circuit, which outputs digital values indicated by an apex to a microcomputer (μC). (MD) is a motor control circuit that controls the film winding motor (M) based on a signal from the microcomputer (μC). (DISP1) and (DISP2) are display devices, which perform predetermined display based on a signal from a microcomputer (μC). Details will be described later. (LE) is a lens data circuit built in the interchangeable lens side, which outputs lens-specific data to the microcomputer (μC). (CD) is a replaceable IC card,
The card information (program information) stored inside is output to the microcomputer (μC). Details will be described later.

Next, the switches will be described. (S1) is a shooting preparation switch that is turned on by pressing the first stroke of the release button (3), and (S5), (S6), (S7), and (S8) are modes. It is a normally open switch for setting changes, and is a single shooting, continuous shooting setting switch, film sensitivity setting switch, AE (auto exposure) mode setting switch, and exposure compensation switch, respectively. Above (S1),
Even if any of the switches (S5) to (S8) is turned on, a signal that changes from high level to low level is input to the microcomputer (μC) via the AND circuit (AN5), and this signal is input port. When input to (S1INT), the microcomputer (μC) executes an interrupt program (S1INT) described later. (SBK) is a switch that is turned on when the back cover is closed, (SCD) is a switch that is turned on when an IC card (CD) is inserted, and (OS1) is a switch that is turned on when the switch (SBK) is turned on. The one-shot circuit that outputs a pulse, (OS2) is a one-shot circuit that outputs one pulse when the switch (SCD) changes from ON to OFF or from OFF to ON. When a pulse is output from one of the two one-shot circuits (OS1) and (OS2), a pulse signal is output to the microcomputer (μC) via the OR circuit (OR1), and the microcomputer (μC) This pulse signal is input to the input port (external IN
T), the interrupt program (external IN
T). (S2) is a release switch that is turned on by the second stroke (deeper than the first stroke) of the release button (3), and (S3) is the focus plane shutter 2
An exposure completion switch that turns on when the curtain has completed running, (S4) a winding completion switch that turns on when the winding of one frame of film has completed,
(Sdn) and (Sup) are normally open down switches and up switches for changing set values and setting modes.
(Sp) is a program switch that directly sets the program exposure mode (hereinafter, P mode). (SA)
Is a switch that is effective when the AE mode is in manual mode, and the aperture value can be changed by turning on this switch (SA).

Next, the control of the camera will be described with reference to the flow chart of the microcomputer (μC) shown in FIG.

<Initial setting> When the battery (E) is installed, the switch (SB) is turned off.
(Open), the capacitor (CR) in parallel with the switch (SB) is charged. When the charging voltage of the capacitor rises above a predetermined level, the microcomputer (μC) sets the reset port (R) to a high level and executes the reset routine (RESET) shown in FIG. Microcomputer (μ
C) first prohibits all interrupts to this flow,
Reset all flags and output ports in RAM (steps # 5, # 10). Next, the process proceeds to the card determination / reading subroutine (# 15). In addition, this sub-routine does not operate when the card is inserted / removed and the shooting preparation switch (S1)
It is also executed when turned on.

This subroutine will be described with reference to the flowchart shown in FIG. 1. The microcomputer (μC) first sets the variable N to “0” (# 45), and the terminal (CSCAD) (see FIG. 4).
Is set to a high level, serial communication with the IC card (CD) is performed, and 1-byte data is input (# 50, # 55).
This serial communication will be described with reference to FIG. 4. When the terminal (CSCAD) goes high, the AND circuits (AN1) and (AN2) become active. The microcomputer (μC) is
After that, eight pulses are output from the terminal (SCK), and these pulses are input to the terminal (SCK) of the IC card (CD) via the AND circuit (AN1). In response, the IC card (C
D) outputs a 1-bit signal from the terminal (Sout) in synchronization with the rising edge of the pulse. The microcomputer (μC) inputs the signal output via the AND circuit (AN2) and the OR circuit (OR3) in synchronization with the trailing edge of the pulse. This 8
Repeatedly and completed one serial communication. Table 1 shows the contents of this input data. As is clear from Table 1,
The presence or absence of a card and the type of card are determined by 2 bits (b1, b0).

(B1, b0) = (0,0) indicates that the IC card (CD) is not inserted when there is no signal (when the card is not inserted). (B1, b0) = (0,1) indicates that the inserted IC card (CD) is a mode setting change card, and (b1, b0) = (1,0) indicates the inserted IC card. (C
D) is an exposure program card, and (b1, b
0) = (1,1) indicates that the inserted IC card (CD) is a demo card.

Returning to the flow of FIG. 1, the microcomputer (μC) determines from the above input data whether or not the IC card (CD) is attached to the camera (# 60), and when the card is not attached, The terminal (CSCAD) is set to the low level to indicate the end of data communication (# 65), and it is determined by the battery flag (BATF) whether a battery is installed next (# 75). Since this flag (BATF) is reset when the battery is installed, the exposure program stored in the ROM of the microcomputer (μC) is loaded into the internal RAM area RAMP (# 80).
Then, the flag (PWF) indicating the exposure program by the IC card (CD) is reset (# 85), and the process proceeds to step # 95.

On the other hand, when the battery flag (BATF) is set, the program determination flag (PWF) is determined (# 9
0) If it is set, it is considered that this subroutine has been executed because the IC card (CD) has been pulled out, so the routine proceeds to step # 80. If the program judgment flag (PWF) is not set, ROMP in ROMP
Assuming that the contents of the exposure program stored in are already loaded, proceed to step # 95. In step # 95, the demo card flag (DEMF) indicating the installation of the demo card is reset. Next, a film flag (WEDF) indicating whether mode setting is possible is determined (# 100). In addition, this mode setting enable flag (WEDF) is the E ^{2 of the} microcomputer (μC).
Since the flag is written in the PROM, it will not be reset once it is written even if the battery is removed or installed.

If the mode setting enable flag (WEDF) is set, the mode in which the setting can be changed is displayed and the process returns (# 105). If it is not set, step # 105 is skipped and the process returns. The mode display and mode setting switch (see FIG. 2) will be described with reference to FIG. As shown in FIG. 6, the switch unit 2 formed of liquid crystal has four mode setting switches (2-1) inside the outer frame.
2 to 4), a total of four displays are displayed, which is displayed once the change card is inserted and is displayed even after the card is removed. If the setting change card has never been inserted, no display will be made. Further, the display device (2) is the second display device (DISP) of FIG.
It corresponds to 2) and also serves as a switch for changing the mode. By lightly pressing the part surrounded by a small square, the set value of the pressed part or the mode can be changed.

Again, it returns to the flowchart of FIG. Step # 60
When it is determined that the IC card (CD) is inserted, the microcomputer (μC) determines the type of the inserted IC card from the data input in step # 55. If the card is a setting change card (# 110), the process proceeds to step # 115. In step # 115, the mode setting enable flag (WEDF) is set to E ² PRO.
Read from M (read when E ² PROM is built-in in the same way as normal ROM), and judge this. When it is set, the mode can already be set, so the terminal (CS
Set CAD) to low level and proceed to step # 95. If the mode setting enable flag (WEDF) is not set, continue serial communication (SIO) (# 125),
Set the port (CSCAD) to low level (# 130). Then, the input data (CHISF, CHAEF, CHDRF, CH correction F (details of which will be described later), WEDF set) is written in the E ² PROM, and the process proceeds to step # 95 (# 13
Five). If the inserted IC card is an exposure program card, the process proceeds from step # 140 to # 150 to perform serial communication. Then, add 1 to N (# 155), and N becomes 2
(# 160), if it is 2, the terminal (CSCA
D) is set to low level to complete 2-byte data communication (# 165). If N is not 2, the process returns to step # 150 to continue serial communication. The 2-byte data content read from the exposure program card by serial communication is
Of these, 11 bits indicate the number of bytes required to write data (up to approximately 2K), and 5 bits specify the program type (32 types). Although only two kinds of exposure programs are used in the embodiment, various other exposure programs can be added. When the microcomputer (μC) finishes the 2-byte data communication,
The program load flag (PWF) indicating whether or not the contents stored in the IC card are loaded in the RAMP is determined (step # 175), and if not set, the process proceeds to step # 180 to set N = 0, Perform serial communication to read the contents of the exposure program (# 185). And 1
For each data communication, add 1 to N (# 190), N
Until K reaches K (K is the number of bytes input in steps # 150 to # 160 above) (# 19
5) If K, set a program load flag (PWF) indicating that the contents of the exposure program card have been loaded (# 205), and proceed to step # 117. The exposure program data read from the IC card is sequentially loaded into the RAMP of the microcomputer (μC).

In step # 175, the program load flag (P
WF) is already set, step # 210
Proceed to step A, and the A type flag (PAF) indicating that the IC card exposure program stored in RAMP is type A
It is determined whether or not is set (# 210). If it is set, in step # 215, it is determined whether or not the exposure program of the IC card inserted this time is the A type. If it is the A type, the process proceeds to step # 117 to check the contents of the IC card. Finish data communication without loading,
If it is not the A type, the A type flag (PAF) is reset and the process proceeds to step # 180 and steps # 185 to # 19.
Load the contents of the IC card with 5. A type flag (PA
If F) is not set, the IC inserted this time
Whether the exposure program of the card is the B type or not is determined in step # 225. When it is the B type, the contents of the IC card are not loaded and the process proceeds to step # 117. When it is not the B type, the A type flag (PAF) And proceed to step # 180 to load the contents of the IC card.

When the inserted IC card is a demo card, the process proceeds from step # 140 to # 235 to display "P PUSH". Then, set the demo card flag (DEMF) indicating the demo card (# 240) and set the terminal (CSCAD) to low level (#
235), after completing the data communication, the process proceeds to step # 100 to determine whether or not the mode setting enable flag (WEDF) is set. If not set, the setting enable mode is displayed (# 105).

In this embodiment, the mode setting change card is 4
It is possible to change the settings for one of the modes, and the display shown in Fig. 6 is displayed by inserting this card once. However, the mode setting change card can change only one mode with one card, Alternatively, a plurality of modes of 2 to 3 may be changed. A modified example of the flow of controlling the reading and display of data at this time is shown in FIGS. 7 and 8.

FIG. 7 shows a modification of steps # 115 to # 135 in FIG.

Serial communication (SIO) is performed (# 125), and the terminal (CSCA
Set D) to low level to end data communication (# 130).
Next, the type of the setting change card is determined from the data input by serial data communication (# 131 '), and it is written in the bit designated by the predetermined address of the E ² PROM corresponding to this (# 132'). . For example, 4 bits b0 to b3 of 1-byte data of the IC card are changed to ISO sequentially, A
These bits are used for E mode change, drive mode change, and exposure compensation change. The microcomputer (μC) discriminates this input data and sets it in bits b0 to b3 of the specified address of the E ² PROM corresponding to the set bit. , Data (flag) may be set.

The flow in FIG. 8 shows how to change the settable mode display (steps # 100, # 105 in FIG. 1) in accordance with the modification of the mode setting changing method.

To briefly explain this, the data (flag) stored in the E ² PROM is determined for each mote, and one of those shown in FIG. 6 is displayed accordingly. Specifically, if the ISO change flag (CHISF) is set in the b0 bit, it is displayed (# 100 ', # 101'), and if it is not set, it is not displayed. Similarly, if the change flag (CHAEF) is set in the AE mode b1 bit, this is displayed (# 102 ', # 103') and b2
If the drive mode change flag (CHDRF) is set in the bit, this is displayed (# 104 ', # 105'), and b3
If the exposure correction mode flag (CH supplement F) is set in the bit, this is displayed (# 106 ', # 107').

This is the end of the subroutine related to IC card determination / reading.

Returning to the flowchart of FIG. 5, when the card determination read subroutine (# 15) is completed, the microcomputer (μC) sets the battery flag (BATF) indicating battery installation (#
20), ΔEv (exposure compensation amount), Av (aperture value), and Tv (shutter speed) are initialized to apex-based values of “0”, “5”, and “7”, respectively (# 25, # 30, # 35). Then, the process proceeds to the film sensitivity reading (DX reading) subroutine (# 36) to read the film sensitivity. This subroutine is shown in FIG. 9 and explained. First, it is judged whether or not the film used is a film having a DX code (hereinafter referred to as DX film) (# 36-1). Step # 36-
At 2, the film sensitivity Sv is read and the process returns. If a film that is not a DX film or a film is not loaded, the film speed (Sv) is set to "5 (apex)" in step # 36-3, and the process returns to the flow of FIG.

Next Step of Film Sensitivity Reading Subroutine # 36 #
In 37, P mode is set as AE mode, so P
Set the mode flag (PMF), set the single shooting mode as the drive mode in step # 38, and set step # 40.
Then, all interrupts (SPINT, PINT, external INT) are enabled and the initialization is completed.

<Switch operation interrupt> Next, either the shooting preparation switch (S1) or the mode setting change switches (S5) to (S8)
The control when it is turned on will be described with reference to the flowchart shown in FIG.

First, the microcomputer (μC) determines whether or not the interrupt to this flow is due to the shooting preparation switch (S1) (# 255). If the interruption is not due to the shooting preparation switch (S1), the mode setting change switch As an interrupt due to (S5 to S8), proceed to the Key1 routine (# 395). This routine is shown in FIG. 11 and explained. First, the transistor (Tr1) is turned off to stop the driving of the external device (# 39).
9). Next, a flag (W
EDF) is judged (# 400), and if this flag (WEDF) is not set, the mode setting cannot be changed and the entire display shown in FIG. 6 blinks for 2 seconds (# 405), 2 When seconds have passed (# 410), the display is turned off and the operation is stopped (# 4).
12). When the mode setting changeable flag (WEDF) is set, the mode setting switch (S5 to S8) is turned on.
Depending on, proceed to the drive mode setting, ISO setting, AE mode setting, correction setting routine (# 415 to 425).

Next, 1 change function or 2 for each IC card
Fig. 11A shows an example in which the changing functions of ~ 3 are provided.

As is clear from comparison with FIG. 11, after each mode is selected, it is determined whether or not the flags (CHDRF, CHISF, CHAEF, CH correction F) indicating that the mode can be changed are set. (Steps # 416, # 421, # 426, # 40
8) If set, proceed to the subroutine of each setting mode as in the case of FIG. If it is not set, among the displays shown in FIG. 6, the display showing that mode, for example, in the case of the ISO setting mode, the display of "ISO" blinks for 2 seconds and stops (steps # 417, # 422). , # 427, # 40
9, # 418).

In this case, FIG. 7, which is a modification of FIG. 5,
The flowchart of FIG. 8 is used.

Before explaining each routine, the contents of the liquid crystal photographing information display device 1 shown in FIG. 2 are shown in FIG. 12 (DISP in FIG. 4).
1). FIG. 12 shows the fully lit state. Of "PAMS",
“P” is the program mode of AE mode (hereinafter, P mode). “A” is the aperture priority mode (hereinafter, A mode),
"M" is manual mode (hereinafter, M mode), "S"
Indicate shutter priority modes (hereinafter, S mode), respectively. "Av, Tv, ISO" is to show what the 4-digit number displayed next to it represents. "Av" is the aperture value, "Tv" is the shutter speed, and "ISO" is The film sensitivity is shown respectively. The lower code is a 2-digit number "Saturday, Sunday.
"Day" indicates the exposure correction amount, "SC" indicates the shooting drive mode, "S" indicates the single shooting mode, and "C" indicates the continuous shooting mode.

<Mode setting / changing routine> Each routine shown in FIG. 11 will be described.

(A) Drive Mode Setting First, the drive mode routine will be described with reference to FIG. 13. When this mode is entered, the microcomputer (μC) displays only the drive mode at that time as “S” or “C” (# 430). Then, whether or not the up switch (Sup) or the down switch (Sdn) is turned on is determined in steps # 435 and # 440, respectively, and when either one is turned on, the process proceeds to step # 450. Step # 4
In 50, change the drive mode display to the other ("S" → ←
"C"), wait for a time (for example, 500 msec.) To prevent continuous switching (# 455).

Next, the flag indicating the continuous shooting mode (continuous shooting F) is determined (# 456), and if it is set, reset (# 45).
7) If it is not set, set it (# 458) and then proceed to step # 435. If neither switch (Sup) nor (Sdn) is pressed, step # 43.
Repeat # 5 and # 440.

(B) ISO setting Next, the ISO setting routine will be described with reference to FIG. 14. First, the microcomputer (μC) displays “ISO” on the liquid crystal display device 1 and the film sensitivity value (Sv) at that time. Only 4
It is displayed on the digit display part of the digit (# 460). When the up switch (Sup) is turned on (# 465), "0.5" (apex) is added to the current film sensitivity (Sv) (# 470), while when the down switch (Sdn) is turned on ( # 475), "0.5" is subtracted from the film speed (Sv) (# 480), and the film speed (Sv) corresponding to this value is displayed as an ISO value (# 485). Also in this case, as in the drive mode, in order to prevent continuous switching, the process waits for a time in step # 490 and then returns to step # 465. If neither switch (Sup), (Sdn) is turned on, step # 46
Repeat # 5 and # 475.

(C) AE Mode Setting Next, an AE mode setting routine will be described with reference to FIG. First, the microcomputer (μC) displays only the current AE mode (any one of “P”, “A”, “M”, and “S”), and turns off the others (# 495). Then, when the up switch (Sup) is turned on, it is cyclically unidirectionally advanced from the current mode by one in the order of P mode → A mode → M mode → S mode → P mode. Proceed in sequence (# 505). On the other hand, the down switch (Sd
When n) is ON, P mode → S mode → M
The sequence is reversed in the order of mode → A mode → P mode (# 530). When the mode is changed, the flag of that mode, specifically PMF in P mode, AMF in A mode, MMF in M mode, SMF in S mode, is set and the flags of other modes are reset. ((51
0), the changed mode is displayed (# 515). Then, it waits for a time to prevent continuous change and loops to step # 500. Either switch (Sup), (Sd
When n) is not turned on, steps # 500 and # 525 are repeated.

(D) Exposure Correction Mode Next, the exposure correction routine is shown in FIG. 16 and explained. First, the microcomputer (μC) sets the present to the exposure correction amount,
For example, display only "+0.5" and turn off the others (# 53
Five). When the up switch (Sup) is ON (# 540), 0.5 is added to the correction amount (ΔEv) (# 545), and when the down switch (Sdn) is ON (# 56).
0), 0.5 is subtracted from the correction amount (ΔEv), and this correction amount (ΔEv)
v) is displayed numerically with a sign (# 550). Then, in the same way as described above, wait for the time (#
555) and return to step # 540. Both switches
If not turned on, steps # 540 and # 560 are repeated. In addition, to exit from each setting mode explained above,
It is sufficient to operate the shooting preparation switch (S1), insert or remove the IC card, close the back cover, and change other mode settings. Alternatively, an internal timer may be provided to stop the switches (Sup) and (Sdn) when they are not turned on for a certain time (for example, 10 seconds).

<When the shooting preparation switch is ON> Returning to FIG. 10, in step # 255, if the shooting preparation switch (S1) is turned ON, step # 265
Go to, reset the timer for power hold, and then start.

Next, proceed to the card judgment / reading subroutine,
Read the information on the IC card (# 275) and turn on the power supply transistor (Tr1) (# 280). The card determination / read subroutine is as described with reference to FIG. Then, the microcomputer (μC)
(LM) outputs a metering start signal to the attached photographing lens (LE) and inputs lens-specific data to the lens data reading subroutine (# 290).

(A) Lens data reading The flow of the lens data reading subroutine will be described with reference to FIG. 17. First, the variable K = 0 is set (# 570), and the terminal (CSL) is set to a high level (# 575). As a result, the AND circuits (AN3) and (AN4) shown in FIG. 4 are activated. Next, the microcomputer (μC) performs serial data communication with the taking lens (LE) (# 580), adds “1” to K, and determines whether this K becomes a predetermined integer value K1. Then, it is determined whether data communication has been performed a predetermined number of times (K1) (# 585 to 590). If the serial data communication count K is K1, the terminal (CSL) is set to low level and the process returns (# 595). If it is not K1, step # 580
Return to and continue data communication. Here, the data input from the photographing lens (LE) side is the open F value (Avo) and the maximum aperture value (Avmax).

(B) Exposure Calculation Next, the exposure calculation subroutine (# 295) is executed to perform the exposure calculation. This subroutine is shown in FIG. 18 and explained. First, the microcomputer (μC) determines the open metering value (Bv
o) from the photometering circuit (LM) (# 600) and the exposure value (E
v) is calculated by Ev = Bvo + Avo + Sv (# 605). And
The exposure mode is determined by a flag indicating each mode. First, when the flag (PMF) indicating the P mode is set (# 610), the AE shown in FIG.
After displaying only "P" in the mode display "PAMS"(# 612), the P mode calculation subroutine (# 615) (RA
(The contents stored in the MP) and return when finished. In this embodiment, the normal program (PN) built in the camera as the P mode, the portrait stored in the IC card, the program with a shallow depth of field for still images (PA), and the IC card are also used. We have prepared a program (PB) that makes the depth of field as deep as possible (however, giving priority to the shutter speed that does not cause camera shake), and one of these programs is
Input to RAMP. The program diagram for that
Shown in Figure 19. This program diagram is open F as a lens
This is the case when a lens having a value of 1.4 and a maximum F value of 16 is used.

A flowchart for executing the program diagram shown in FIG. 19 is shown in FIGS. 20 (I) to (III).

(B-1) Normal Program (PN) The exposure calculation by the normal program will be described with reference to FIG. 20 (I). First, only the left end of the 7-segment numerical display of the display device 1 shown in FIG. Is displayed (# 679), the aperture value (Av) is calculated from Av = (2/3) (Ev-11 / 2) (# 680), and this aperture value (Av) is the maximum aperture value of the interchangeable lens. (Avmax) is compared (# 685), and when larger than that, the aperture value (Av) is set as the maximum aperture value (Avmax) (# 6).
90). On the other hand, when the aperture value (Av) is smaller than the maximum aperture value (Avo), the aperture value (Av) is set to the maximum aperture value (Avo) (# 720). If neither (Avmax ≧ Av ≧ Avo),
With the calculated value as the aperture value (Av), the process proceeds to step # 695 for calculating the next shutter speed (Tv). This calculation is performed by Tv = Ev−Av, and the obtained shutter speed (Tv) is the maximum shutter speed (Tvmax) of the camera.
If it exceeds the maximum shutter speed (Tvmax), the shutter speed (Tv) is set as the maximum shutter speed (Tvmax) (# 705), and the P mark is set. Blink to warn (# 71
0). Then, it returns to the original flow. When the maximum shutter speed is not exceeded, # 705 and # 710 are skipped and the process returns.

(B-2) PA program Next, the calculation by the program (PA) of the shallow depth of field will be described with reference to FIG. 20 (II). First, in step # 722, the three left segment numerical value displays are used. hand Is displayed. Next, in step # 725, the maximum aperture value (Avo)
Is less than "3", and if it is less than "3", the aperture value (Av) is set to "3"(# 735). If the maximum aperture value (Avo) exceeds "3", The value (Av) is used as the maximum aperture value (# 730), and the shutter speed (Tv) is calculated from Tv = Ev-Av (# 740). This calculated shutter speed (T
It is determined whether or not v) exceeds the maximum shutter speed (Tvmax) (# 745), and if it does not exceed, it immediately returns. If the maximum shutter speed (Tvmax) is exceeded, set the shutter speed (Tv) to the maximum shutter speed (Tvmax) (# 750) and the aperture value (Av) to Av = Ev-Tv
Recalculate with (# 755). Next, it is judged whether or not the aperture value (Av) obtained by this calculation exceeds the maximum aperture value (Avmax) (# 760). If the aperture value (Av) is not exceeded, the process returns to the original flow. If it exceeds, the aperture value (Av) is set to the maximum aperture value (Avmax) (# 765), the P mark blinks to warn (# 770), and the process returns.

(B-3) PB Program Next, the exposure calculation in the program (PB) having a deep depth of field will be described with reference to FIG. 20 (III). First, from the left edge of the 7-segment numerical display in step # 773 Is displayed. Then, in step # 775, the shutter speed (Tv) is set to "6" and the aperture value (Av) is calculated by Av = Ev-6 (# 780). Then, it is determined whether or not this aperture value (Av) exceeds the maximum aperture value (Avmax) (# 785). If it does not exceed, the process proceeds to step # 815, where the aperture value (Av) is greater than the maximum aperture value (Avo). Is also small. If it is not smaller, it returns to the original flow as it is. If it is smaller, the aperture value (Av) is set to the maximum aperture value (Avo) (# 820),
The shutter speed (Tv) is calculated from Tv = Ev-Av and the process returns (# 825). In step # 785, the aperture value (A
If v) exceeds the maximum aperture value (Avmax), aperture value (Av)
As (Avmax) (# 790), shutter speed (Tv)
Is calculated from Tv = Ev−Av (# 795). The calculated shutter speed (Tv) is the highest shutter speed (Tvma
x) is exceeded (# 800), if it does not exceed, it returns to the original flow, and if it exceeds, the shutter speed (Tv) is set to the maximum shutter speed (Tvmax) (# 805). In step # 810, the P mark blinks to warn, and the process returns.

(B-4) A mode (aperture priority mode) Returning to FIG. 18, when the aperture priority mode is set, the process proceeds from step # 620 to # 622. In step # 622, only "A" in the AE mode "PAMS" is displayed and the shutter speed (Tv) is calculated by Tv = Ev-Av (Av is a set value). It is determined whether the calculated shutter speed (Tv) exceeds the maximum shutter speed (Tvmax) (# 6
30) If it exceeds, the shutter speed (Tv) is set to the maximum shutter speed (Tvmax) (# 635), the A mark is blinked to warn (# 640), and the process returns. If the shutter speed does not exceed the maximum speed, it returns immediately.

(B-5) S mode (shutter speed priority) If the AE mode is the shutter speed priority mode, the process proceeds from step # 645 to # 647 to display only S in the AE mode display “PAMS”. Aperture value (Av) Av = Ev
Calculated from -Tv (set value) (# 650), it is determined in step # 655 whether or not this aperture value exceeds the maximum aperture value (Avmax). If it exceeds, in step # 675. The aperture value (Av) is set to the maximum aperture value (Avmax), the S mark blinks, and the process returns. If the aperture value (Av) does not exceed the maximum aperture value, the aperture value is the maximum aperture value (Avo)
It is determined whether or not it is smaller (# 660), and if it is not smaller, the process returns to the original flow chart. If it is smaller, the aperture value (Av) is increased to the open aperture value (Avo) in step # 665.
Then, the S mark blinks and the process returns (# 670).

(B-6) M mode (manual mode) When in the manual mode, the process proceeds from step # 645 to step # 677 to display only "M" of "PAMS" in the AE mode display and return.

(C) Aperture value / shutter speed change (Key2 routine) Returning to FIG. 10, when the exposure calculation subroutine is completed,
By operating the up switch (Sup) and the down switch (Sdn), the process proceeds to the subroutine Key2 routine for changing the aperture value and shutter speed.

This will be described with reference to FIG. In this routine, first, in step # 820, it is determined whether or not the up switch (Sup) is turned on, and if it is turned on, the up flag (UPF) is set (# 825). On the other hand, in step # 830, it is determined whether or not the down switch (Sdn) is turned on. If it is turned on, the up flag (UPF) is returned (# 835), and the process proceeds to step # 840. If neither switch is turned on, the process returns. Then, the following steps # 840 ~
With # 870, depending on the set AE mode, aperture value,
The shutter speed can be changed.

When in the P mode, the program shift subroutine from step # 840 to # 845 is executed. If the mode is the A mode, the process proceeds from step # 850 to the aperture change subroutine of # 855. When in S mode, step #
Proceed to the subroutine for changing the shutter speed from # 860 to # 865. These subroutines are shown together in FIG.
As shown in FIG. 22, the program shift (P change) and the aperture change (A change) are the same. First, in step # 890, an up flag (UPF) indicating that the up switch (Sup) is turned on is set. If it is determined and set, the process proceeds to step # 895, and it is determined whether the aperture value (Av) is equal to the maximum aperture value (Avmax). If they are equal, further change is impossible and the process returns. If the aperture value (Avo) is not equal to the maximum aperture value (Avmax), step # 900
0.5 to the aperture value (Av), and then step # 905
Then, 0.5 is subtracted from the shutter speed (Tv) to obtain each aperture value (Av) and shutter speed (Tv), and the process returns.

On the other hand, when the up flag (UPF) is not set, it is assumed that the down switch (Sdn) is turned on, and the process proceeds to step # 910 to check whether the shutter speed (Tv) is equal to the maximum shutter speed (Tvmax). If the determinations are the same, the change is not possible and the process returns. If the shutter speed (Tv) is not equal to the maximum shutter speed (Tvmax), it is determined in step # 915 whether the aperture value (Av) is equal to the open aperture value (Avo). If they are equal to each other, it cannot be changed and returns. If they are not equal, 0.5 is subtracted from the aperture value (Av) (# 920), 0.5 is added to the shutter speed (Tv) (# 925), and the aperture value (Av),
Set the shutter speed (Tv) and return.

When the shutter speed is changed (S change), the up flag (U
PF) and if set, step #
A flow of 0.5Ev addition of shutter speed after 910, or a flow of subtraction of 0.5Ev shutter speed after step # 895 is executed if not set.

In FIG. 21, if neither of the above modes is set, it is determined that the mode is the manual mode, and the process proceeds to the manual change subroutine of step # 870. This will be described with reference to FIG.

As shown in FIG. 23, in this routine, the aperture change switch (SA) in manual mode (see FIG. 4) is turned on.
Whether or not the aperture is changed or the shutter speed is changed is determined (# 930). If the aperture has been changed, the process proceeds to step # 935, and it is determined whether the up flag (UPF) is set. If it is set, it is determined that the up switch (Sup) is turned on and the process proceeds to step # 940 to determine whether or not the aperture value (Av) is the maximum aperture value (Avmax). If the values are not equal to each other, 0.5 is added to the aperture value (Av) to return (# 945). If the up flag (UPF) is not set, it is determined that the down switch (Sdn) has been turned on and the process proceeds to step # 950 to determine whether the aperture value (Av) is the open aperture value (Avo). If they are equal, the flow returns as it is, and if they are not equal, 0.5 is subtracted from the aperture value (Av) and the flow returns (# 955). If the aperture change switch (SA) is not turned on, the process proceeds to step # 960 as the shutter speed change mode. In this step, it is judged whether or not the up flag (UPF) is set, and if it is set, it is determined that the up switch (Sup) is ON and the process proceeds to step # 965, where the shutter speed (Tv) is the highest. Speed (Tvma
x)), and if they are not equal, the shutter speed (Tv) is set to 0.5.
Add and return (# 970). Up flag (UP
If F) is not set, 0.5 is subtracted from the shutter speed (Tv) in step # 975, and the process returns.

Returning to FIG. 21, when the aperture value or shutter speed has been changed in each AE mode, the process proceeds to step # 880, waits for a time to prevent continuous change, and returns and starts the hold time timer. Then, 5 seconds is newly measured from this point (# 885). This is the end of the Key2 subroutine.

(D) Display / shooting When the Key2 subroutine is completed, the process returns to the flowchart in FIG. 10 and the microcomputer uses Av, Tv and segments to select the aperture value (F value) and Av, S mode in A mode. Occasionally, the shutter speed (for example, 1/60) and Tv are displayed, but not displayed in other exposure modes (note that the aperture value and shutter speed are displayed in the viewfinder (not shown)). In displays other than the above,
Exposure compensation amount (ΔEv), AE mode display, and drive mode are displayed (# 305). Then, it is determined whether or not the demo flag (DEMF) indicating that the demo card is inserted is set (# 310). When it is set, the release prohibit mode is set and the process proceeds to step # 370. In step # 370, it is determined whether or not the shooting preparation switch (S1) is turned on. If it is turned on, the timer is reset and started in step # 370, and the maintenance time measurement is started from this point. Return to step # 285.
When the switch (S1) is OFF, it is determined whether or not the power hold timer has elapsed for 5 seconds. If not, the process returns to step # 285. If 5 seconds have elapsed, reset the flag indicating that the release was performed,
Set the output port to the low level and stop it (# 385,39
0).

Demo card flag (DEMF) in step # 310
If is not set, in step # 315, it is determined whether or not the release switch (S2) is off by the level of the input port (IP11). If it is high level, the release switch (S2) is off. Therefore, the process proceeds to step # 370. If the input port (IP11) is at the low level, the process proceeds to step # 320, it is determined whether or not the flag indicating the continuous shooting mode (continuous shooting F) is set, and if it is set, a release operation is performed at step # 320. 33
Go to 0. When the continuous shooting flag (continuous shooting F) is not set, that is, when the single shooting mode is set, a flag (release F) indicating whether or not the shooting preparation switch (S1) has been released once is determined. (# 325). When the release flag (release F) is set, it is assumed that the release is performed once in the single shooting mode (S mode), and the process proceeds to step # 370 to prohibit the release operation.

When the release flag (release F) is not set, the process proceeds to step # 330 to perform the release operation. After inhibiting the interruption to this flow, the microcomputer (μC) outputs the exposure data (Tv, Av) to the exposure control circuit (AE). The exposure control circuit (AE) uses the timing of receiving this data as the release start, and the aperture, mirror up,
The shutter control is sequentially performed. Then, when the traveling of the two curtain plane shutters is completed, the switch (S3) is turned on.
When turned on and the microcomputer (μC) detects this from the input port (IP10) (# 340), it outputs a winding start signal to the motor control circuit (MD) (# 345). Switch (S4) is ON
Then, when the microcomputer (μC) detects the completion of hoisting (# 35
0), output the motor stop signal to the motor control circuit (MD) (# 355), set the release flag (release F) (# 360), enable the interrupt (# 365), step #
Proceed to 370.

(E) External Interrupt Next, an external interrupt routine external INT by inserting or removing the IC card or closing the back cover is shown in FIG. 24 and explained.

First, the interrupt from the back cover closing will be explained. When the back cover closing switch (SBK) is turned on, a pulse is output from the one-shot circuit (OS1) in FIG. 4 and is sent via the OR circuit (OR1). Pulse enters the external INT port,
The microcomputer (μC) executes the interrupt of this flow. At the same time, the reset flip-flop (RSFF) is set by the pulse.

In Fig. 24, the microcomputer (μC)
It is determined by the input port (IP5) whether the IC card is inserted or removed (# 985). Since the input port (IP5) is now at high level, the microcomputer (μ
C) advances to step # 990 as an interruption due to the closing of the back cover, advances to the subroutine of the DX film ISO reading explained in FIG. 9, and reads the film sensitivity. Then, one pulse is output from the input port (OP1) to reset the RS flip-flop from the input port (OP1) (# 995),
Enable the interrupt by the shooting preparation switch (S1) and return (# 1000).

When the interrupt is due to the insertion or removal of the IC card, the pulse from the one-shot circuit (OS2)
It is input to the input port (external INT) via R1) and the microcomputer (μC) executes the interrupt of external INT. The microcomputer (μC) proceeds from step # 985 to step # 1005. In this step 1005, the interrupts of S1INT and PINT are prohibited, and the process proceeds to the card determination and reading subroutine described in FIG. 1 to read the card information. Then, allow PINT (# 1020) and proceed to step # 995.

Next, the interruption caused by turning on the program switch will be described with reference to FIG. First, the microcomputer (μC) determines in step # 1025 whether the flag (DEMF) indicating the insertion of the demo card is set. If not set, it is determined that the P mode is directly selected, and the process proceeds to step # 1040. . In step # 1040, AE mode display "P, A, M, S"
The "P" mode is displayed, the flag (PMF) indicating this mode is set, the flags indicating the other AE modes are reset, and the process returns. If the flag (DEMF) is set in step # 1025, a flag indicating that setting / modification is possible is determined. If this flag (WEDF) is set, the process proceeds to the DEMO subroutine described below, and the subroutine ends. Then, proceed to step # 265. On the other hand, when the flag (WEDF) is not set, step # 1035 is skipped and step # 265
Proceed to.

(F) Demo (DEMO) Subroutine The above DEMO subroutine is shown in FIG. 26 and explained. When this subroutine starts, first, the microcomputer (μC)
Displays only the ISO mode among the displays shown in the figure (# 1055). Then, the display device 1 shown in FIG. 12 displays only "ISO"(# 1060). Next, the stored film speed is once stored in the register (SvIR), and the film speed (Sv) is set to the initial value of 2.5 (# 106
5,1070). In step # 1075, this film speed (S
0.5 is added to v), and this value is displayed numerically in step # 1080. This value corresponds to "ISO25" and is the smallest value that can be set for the camera. In Step # 1085, wait for the film speed (Sv) to prevent continuous change.
The film speed (Sv) is sequentially increased by "0.5" and displayed until is "11" (equivalent to "ISO3200") (# 1085, # 1
090). Then, from step # 1095, the film sensitivity (SvI) once stored in the register (SvIR) is set as the regular film sensitivity (Sv), and the process proceeds to step # 1105.

In step # 1105, only the display "PAMS" shown in the AE setting mode of FIG. 6 is displayed. Then, only "PAMS" in the AE mode of the liquid crystal display device 1 shown in FIG.
→ A → M → S ”is displayed (# 1110 to # 1145). In addition,
A certain waiting time is provided between each display so that the display proceeds discontinuously at each waiting time. (# 111
5, # 1125, # 1135, # 1145).

Next, the microcomputer (μC) proceeds to step # 1155,
Of the displays in FIG. 6, “DRIV” showing the drive setting mode
Display only "E". Then, only the drive mode displays “S” and “C” shown in FIG. 12 are sequentially displayed as “S → C” (# 1160 to # 1175). A waiting time is provided between the displays to prevent continuous display.

Next, the microcomputer (μC) displays only “+/−” indicating the exposure amount correction setting mode in FIG. 6 in step # 1185. Then, the stored exposure compensation amount (ΔEv) “−2.5”
To the register (ΔEvIR) once (# 1190),
Set the correction amount (ΔEv) to "-2.5"(# 1195). Then, in step # 1200, add "0.5" to the correction amount (ΔEv),
The display including the reference numerals is displayed in the exposure correction amount display field in FIG. 12 (for example, “−2.0” (# 1025)). At this time, the other displays are turned off in the same manner as described above. Until the correction amount (ΔEv) becomes “2”, “0.5” is added to the correction amount and displayed sequentially (# 1210). When the correction amount (ΔEv) becomes “2”, the correction amount (ΔEvI) stored in the register (ΔEvIR) is re-memorized and returned as the correction amount (ΔEv) (# 1215).

FIG. 26A shows a DEMO routine in the case where one IC card can change the setting of modes 1 to 3.

Explaining only the differences from FIG. 26, a check mode of each flag indicating whether or not the setting of the mode can be changed is added before the demonstration display of each mode. If it is not possible to change the setting of the corresponding mode of the corresponding steps # 1050, # 1100, # 1150, # 1180, the demo display is not performed.

<Modification> Next, a modification of the mode setting change switch is shown in FIG. 27. The mode setting change switch (2 ′) is a single normally open switch and has the display as shown in FIG. There is no function. By repeatedly turning on this switch (2 '), the AE mode setting → ISO setting → correction amount setting → drive mode setting can be switched in order.

Regarding the display of the mode in which the setting can be changed, as shown in Fig. 28, "ISO", "DRV", "AE", "+/-" are displayed on the liquid crystal display device (1 ') provided on the upper part of the camera body. Is provided and displayed. This display continues to be displayed after the mode setting / change card is inserted once.

The operation method in this modification and the mode switching control at that time will be described with reference to the circuit diagram shown in FIG. 29 and the flowchart shown in FIG. Note that FIG. 29 is a modified example of FIG. 4, and the changed points are the mode setting switches (S5) to (S8) of FIG.
(Corresponding to the switch (2 ') in FIG. 28) and the input ports (IP1) to (IP4) of the microcomputer (μC)
Has been replaced by one input port (IP1 '), and the display device is (DISP1') (the liquid crystal display device (1 ') in FIG. 28).
Is equivalent to ) Are all three points.

FIG. 30 is a modification of FIG. 11 which is the Key1 routine shown in step # 395 of the flowchart of S1INT shown in FIG.

This type of mode setting change will be described with reference to this flow chart. When the mode setting change switch (S5 '), that is, (2') is turned on, S1INT of FIG. 10 is executed and the photographing preparation switch ( Since S1) has not been turned on, the routine proceeds from Step # 255 to the Key1 routine shown in FIG. If you proceed to this flow, microcomputer (μC)
First turns off the transistor (Tr1) (# 1299), then determines whether or not the flag (WEDF) indicating that the setting can be changed is set (# 1300). If not set, In the display shown in Fig. 28, "ISO, DRV, AE,
The four displays of "+/-" blink for 2 seconds to warn and stop (# 1305, # 1307). When the mode setting enable flag (WEDF) is set, the drive mode setting flag (DRF) indicating that the drive mode setting was set last time is determined in step # 1310, and this flag (DRF) is set. At this time, as the AE mode setting, the flag (AEF) indicating the AE mode setting is set (# 1325), the flag (DRF) indicating the drive mode setting is reset (# 1330), and the AE mode setting routine ( Proceed to Fig. 15). If the drive mode setting flag (DRF) is not set, it is determined in step # 1335 whether or not the AE mode setting flag (AEF) is set.
I when the mode setting flag (AEF) is set
Set the SO setting flag (ISF) (# 1350), reset the AE mode setting flag (AEF) (# 1355), ISO
Proceed to the setting routine (Fig. 14). If the AE mode setting flag (AEF) is not set, step # 136.
Go to 0 to determine whether the ISO mode setting flag (ISF) is set. If it is set, reset this ISO mode setting flag (ISF) (# 137
5) Proceed to the exposure compensation ± compensation mode (Fig. 16) (# 137
Five). When the ISO mode setting flag (ISF) is not set, the drive mode setting flag (DRF) is set and the process proceeds to the drive mode setting routine (Fig. 13) (# 1390). The routine for setting each mode is as shown in FIG. 13 to FIG. 16 described above, and regarding the control of the display, among the displays in FIG. 28, “ISO”, “DRV”, “A” are displayed.
It applies only to the part excluding "E" and "+/-", in other words, the same part as shown in FIG.

FIG. 31 shows a modification of FIG. 30, which is an IC card 1
The case where the number of modes whose settings can be changed is "1 to 3" per sheet is shown. At this time, the mode display for changing the setting is
As shown in FIG. 8 and FIG. 8, this is displayed when the change mode is added, and continues to be displayed thereafter.

As is clear from comparison with FIG. 30, in FIG. 31, steps # 1300 to # regarding the mode setting change flag (WEDF) are performed.
The flags (CHAEF), (CHISF), (CH correction F), (CHDRF) pre-stored in the IC card are used in order to warn by the blinking display of the mode in which the setting cannot be changed instead of the blinking display of all modes of 1307 ) Value (this has already been read to the microcomputer (μC) side by serial data communication SIO with the IC card), it is determined whether or not each setting change mode can be set in step # 1315, # 1340, # 1365, # 138
0 is added. If each flag is set, that is, if such mode setting / changing is specified, set each mode in the same manner as in FIG. 30,
On the other hand, if the flag is not set, a display indicating the mode that cannot be set / changed, for example, in the case of AE mode setting, "AE" blinks for 2 seconds to give a warning, and then the microcomputer (μC) Stop (# 1320, # 1345, # 1370, # 1
385, # 1390).

Note that, in FIG. 31, step numbers equal to the step numbers in FIG. 30 indicate the same steps in FIG.

In the embodiment shown in FIG. 31, a warning is given by blinking the display of the setting mode in which the setting cannot be changed. However, in FIG. 32, the warning is not given and only the settable mode is operated cyclically. By doing so, the photographer is made aware of the modes that cannot be set, and the mode can be quickly changed to the mode in which the setting change is desired. Specifically, as apparent from comparison with FIG. 31, the step number of the flag determination indicating that the setting can be changed is entered before proceeding to each setting mode (# 1332, # 1357, # 1377). , # 1392),
When the flag is set, the process proceeds to each setting mode, and when the flag is not set, the process proceeds to the first step for determining whether to set / change the next mode. That is, if it is the determination step # 1332 whether or not to change the AE setting mode, the steps # 1332 to # 13
If it is step # 1357 to determine whether to set ISO to 35, it is determined whether to change the exposure correction from step # 1357 to # 1360. If step # 1377, step # 1377
If it is the determination step # 1392 from 1377 to # 1390 whether to change the drive mode, the process proceeds from # 1392 to # 1310.

In the above embodiment, the IC card is provided on the camera body side, but it may be provided on the back cover of the camera if there is no space.
In addition, as an IC card whose function can be changed, a program shift function is possible, a highlight / shadow function is possible, and a model with only one-shot AF has a continuous AF function switchable card AF function. In the case of a camera, it is possible to switch between AF priority and release priority cards. In the case of a camera with a self-function, a card that can be switched in self-time (for example, 2 seconds, 10 seconds, 15 seconds) can be considered.

[Effects of the Invention] According to the present invention, the camera has only the predetermined function, and before the addition of the function, only the predetermined function is displayed and the desired function can be selected, while the function can be changed by the accessory. When is added, the display regarding the added functions in addition to the above-mentioned predetermined functions will be displayed, so that the user can select and use only the functions that he or she needs, and the functions that are not necessary. It is possible to easily understand what functions can be used without the trouble of selecting after understanding.

[Brief description of drawings]

FIG. 1 is a flow chart of one main program of a camera according to the present invention, FIGS. 2 and 3 are a rear perspective view and a partial front perspective view showing a display device and switches, respectively.
FIG. 4 is a system configuration diagram of the camera, FIG. 5 is a flowchart showing a reset routine of the system, FIG. 6 is a plan view showing a mode setting switch, and FIGS. 7 and 8 are flowcharts shown in FIG. FIG. 9 is a flowchart showing the DX reading subroutine, FIG. 10 is a flowchart showing the S1INT subroutine, and FIG. 11 is a flowchart showing the Key1 routine.
FIG. 11A is a flowchart showing a modification of FIG. 11, FIG.
The figure is a plan view of the display device, Fig. 13, Fig. 14, Fig. 15, Fig. 16
The figure shows drive mode, ISO setting mode, AE mode, ±
FIG. 17 is a flowchart of the correction mode, FIG. 17 is a flowchart of a lens data reading subroutine, FIG. 18 is a flowchart of exposure calculation, FIG. 19 is a graph showing a program diagram in which settings can be changed, and FIGS. , (III) are flow charts showing the setting routine of each program diagram in FIG. 19, FIG. 21 is a flow chart showing the Key2 routine, FIG. 22 is a flow chart showing the P, A change and S change routines, FIG. 23 is a flow chart showing the M change routine, FIG. 24 and FIG. 25 are flow charts of external INT and PINT interrupt routines, FIG. 26 is a flow chart showing the DEMO routine, and FIG. 26A is a modification of FIG. 27 is a rear perspective view showing a modified example of the camera, FIG. 28 is a plan view of the display device of the camera of FIG. 27, and FIG. 29 is a modified example of the system configuration of the camera. FIG. 30 is a flow chart showing a modified example of the subroutine of Key1, FIG. 31 is a flowchart showing another modified example of Key1, and FIG. 32 is a flowchart showing another modified example of the Key1 routine. is there.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaaki Nakai, 2-30 Azuchi-cho, Higashi-ku, Osaka City, Osaka International Building Minolta Camera Co., Ltd. (72) Masayasu Hirano 2-30, Azuchi-cho, Higashi-ku, Osaka City, Osaka Toki Building Minolta Camera Co., Ltd. (72) Inventor Akihiko Fujino 2-30 Azuchi-cho, Higashi-ku, Osaka Osaka Kokusai Building Minolta Camera Co. (72) Inventor Hiroshi Otsuka 2-30 Azuchi-cho, Higashi-ku, Osaka Osaka Toki Building Minolta Camera Co., Ltd. (56) Reference JP-A-61-134747 (JP, A) US Patent 4286849 (US, A)

Claims (3)

(57) [Claims] 1. In a camera capable of outputting data relating to the function of a camera loaded with a film and capable of achieving a predetermined function, a function control means for executing the predetermined function, , A display means for displaying information related to the function as the predetermined function is executed, a reading means for reading the output data when the accessory is attached to the camera, and an additional means according to the content of the read data. The function control means can execute the function when the function is added, and the display means can perform the predetermined function before the function is added. Are displayed so that when a function is added, it is possible to display the added function in addition to the above-mentioned predetermined function. The camera which is characterized. 2. The camera according to claim 1, wherein the display means displays a display indicating the added function. 3. The camera according to claim 1, wherein the display means displays a manually settable value in the added function.