JP2595498B2 - Single-lens reflex camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a plurality of manually settable shooting information, and more particularly to a camera having a plurality of manual operation members for changing data contents of each shooting information. About the camera.

[Prior Art] In general, the shooting posture of a single-lens reflex camera is basically that the main body of the camera is mainly held by a dominant hand operating a shutter release button, and the lens barrel is additionally supported by the other hand. Therefore, it is convenient for operation that the operating members other than the shutter release button are located near the shutter release button so that the dominant hand can operate it.

On the other hand, as camera functions increase in recent years, photographing information (film sensitivity, shutter speed, aperture value, and the like) that can be manually set by a photographer also tends to increase.
It has become necessary to provide a camera with a large number of operating members for changing the data content of shooting information. For example, Japanese Patent Application Laid-Open No. 56-74231 discloses a specification member for specifying one of a plurality of pieces of photographing information to be changed and a common data change for changing the data content of the specified photographing information. A camera is disclosed in which both members are provided near a shutter release button. In addition, for example,
Japanese Patent Application Laid-Open No. 54-107339 discloses an arrangement in which three dedicated correction members for correcting three different pieces of photographing information are arranged near the shutter release button so that the dominant hand can operate the correction members.

[Problems to be Solved by the Invention] However, in the camera disclosed in Japanese Patent Application Laid-Open No. Sho 56-74231, the operation member for setting photographing information is concentrated and exposed on the outer surface of the camera near the shutter release button. May be confused by those operations. Further, since the data change member is commonly used to change a plurality of pieces of photographing information, if the photographing information is inadvertently touched during the operation of changing one piece of photographing information to designate another piece of photographing information, However, there is a risk that the photographer may change unintended data without realizing it.

In this regard, Japanese Patent Application Laid-Open No. 54-107339 discloses that a safety switch commonly used for each piece of photographing information is arranged on the opposite side of the projection of the pentaprism from where the correction member is arranged. The data can be changed only when the correction switch is operated with the other hand while pressing the safety switch with the other hand. However, in this camera, the correction switch arranged on the same side as the release switch directly affects the selection of the shooting information to be changed together with the change of the data content, so for example, the safety switch is pressed with one hand. Also, if the other hand accidentally touches another correction switch while changing the shooting information which is the other hand, as a result, the intention is the same as in the case of the camera disclosed in JP-A-56-74231. There is a danger that incorrect shooting information changes will be specified and cause erroneous input. Further, in this conventional camera, the operating members involved in changing the exposure control values such as the shutter speed and the aperture value are positioned so as to be operated with a hand different from the dominant hand (usually a hand supporting the lens). , The fine adjustment operation of the exposure control value that is frequently performed at the time of shooting is difficult to perform smoothly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera with good operability that eliminates the complexity of operations and reduces inadvertent erroneous input operations of shooting information in view of the above problems.

[Means for Solving the Problems] A single-lens reflex camera according to the present invention is a camera having a protruding portion provided with an erecting optical system, wherein a shutter release button is disposed on one side of the protruding portion. A photographing information designating member arranged on the other side with respect to the protruding portion and designating one kind of photographing information from a plurality of kinds of photographing information; and a photographing information designating member arranged on the same side as the shutter release button. Change of the data content of the shooting information specified by the user, and a data changing member involved in changing the shutter speed or the aperture value according to the set exposure control mode, and specifying the shooting information by the shooting information specifying member. When the data change member is operated, the data of the photographing information is changed. Control means for changing the shutter speed or the aperture value in accordance with the set exposure control mode when the further member is operated.

[Operation] In a single-lens reflex camera having a projection provided with the erecting optical system according to the present invention, a photographing information designating member for designating one of a plurality of types of photographing information is provided by an erecting optical system. To the shutter release button and a different side. On the other hand, the data change member involved in changing the data content of the shooting information specified by the shooting information specifying member and changing the shutter speed or aperture value according to the set exposure control mode includes a shutter release button and a shutter release button. Place on the same side. The arrangement of the data change member is suitable for operating the data change member with the hand that operates the shutter release button, that is, the dominant hand of the photographer. The data change member located on the same side as the shutter release button,
Since it is not directly involved in the selection of the photographing information, the photographing information to be changed accidentally is not switched, so that the possibility of erroneous input can be greatly reduced.

[Object of the Invention] The present invention considers the nature of various data to be displayed,
It is an object of the present invention to provide a display device which improves convenience in use and clarifies a display mode.

[Structure] The display device of the present invention includes a first display unit for displaying both the ISO data and the exposure time data, and an IS value such as an aperture value.
O, a second display unit for displaying data for shooting other than the exposure time, which changes in each shooting,
Control means is provided for turning off the second display section when the setting means for setting data is operated, and for setting the second display section to the display state when the setting means is operated.

With this configuration, only the ISO data is displayed when setting ISO data that does not change depending on the individual configuration.When setting the exposure time data that should be selected and set according to each shooting, individual exposure time data with such characteristics is set Other photographing data having a property that changes according to photographing is also displayed.

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

In FIG. 1, 1 is a camera body, 2 is a release button,
The release button 2 is provided with a photometric switch S1 for instructing photometry when manually pushed down to the first stage, and a release switch S1 which is turned on when pushed down to the second stage and operates the shutter.

Reference numeral 3 denotes a mode changeover switch using a slide switch. P represents a program mode, S represents an exposure time priority automatic aperture mode, M represents a manual mode, and A represents an aperture priority exposure time automatic mode. Reference numeral 4 denotes a display device on which control exposure time, aperture value, and film sensitivity override data are displayed.

5 is an aperture value setting key, 6 is a shutter speed setting key, 7,
Reference numeral 8 denotes an up key and a down key for changing the aperture value F and the shutter speed SS. 9 is a counter display window,
The number of frames shot on the film is displayed.

Reference numeral 10 denotes an ISO mode key. When the ISO mode key is pressed, the ISO data used in the camera body 1 is displayed on the display unit 4.
Is displayed, and the up key 7 and the down key 8 can be used to change the ISO data.

11 is an override key. When this key is pressed, the override data is displayed on the display unit 4 and the up key is pressed.
7. By operating the down key 8, the override data can be changed. Reference numeral 13 denotes a film information display window provided on the back cover 13 of the camera body 1. As described above, the up key 7 and the down key 8 are involved in changing the aperture value F and the shutter speed SS, and when the ISO mode key 10 is pressed, the ISO data is changed, and the override key 11 is pressed. Sometimes we are involved in changing override data.

As shown in FIG. 2, the camera body 1 shown in FIG. 1 is provided with code reading contacts 15 and 16 for reading ISO data provided on the film container 14. The contact pieces 15 and 16 are formed on the outer peripheral surface of the film container 14 as shown in FIG. 6, for example, a plurality of contact pieces AT2 to AT6, FT8 and F which come into contact with the code electrodes 1 to 10 in two rows and six rows, respectively.
It has T9, FT10, RT11, RT12.

Each of the contact pieces AT2 to RT12 is fixed to an upright column 18 made of an insulating material in the camera body 1 with screws or the like.

In the camera body 1, as shown in FIG. 3, a back cover opening / closing detection switch 31 that is turned off when the back cover 33 of the camera is closed and turned on when the back cover 33 is opened, and a counter switch 34 that is interlocked with the film counter 34. Is provided. Counter switch
34 is opened and closed by a lever 36 operated by a cam 35, and is turned on when the count value of the film counter is between S and 1, and turned off when the count value is equal to or more than S.

FIG. 4 is a block diagram of the entire camera system to which the present invention is applied. (PO1) is a power-on reset circuit that outputs a power-on reset signal from the terminal (PR1) when a power supply battery (BAB) is mounted and power supply from the power supply line (VC) is resumed.

(MCB) is a microcomputer (hereinafter referred to as a microcomputer) that controls the operation of the entire camera system. The operation of this microcomputer (MCB) is shown in FIG. 7, FIG. 8, FIG.
This is shown in the flowcharts of FIGS. 10 and 11. (S1)
Is a photometric switch, which is closed when the release button 2 is first depressed. (ISS) is a switch that is closed by pressing the ISO mode key (10), and (ORS) is a switch that is closed by pressing the override key (11). A switch (FSS) is closed by pressing an aperture value setting key (5), and a switch (SSS) is closed by pressing an exposure time key (6). (UPS) is a switch that is closed by pressing the up key (7), and (DOS) is a switch that is closed by pressing the down key (8). These switches are the output terminals (O2), (O3), and (O3) of the microcomputer (MCB). (O4) and the input terminals (i1), (i2), and (i3) form a key matrix, and the closed switch is determined by the microcomputer (MCB).

This microcomputer (MCB) has a pin (O
2), (O3) and (O4) are “High”, and the line connected to the input terminal (i1) is passed through the AND circuit (AN1), OR circuit (OR1), and AND circuit (AN3). Interrupt terminal (it
A). Therefore, the photometric switch (S1), ISO
When the switch (ISS) or override switch (ORS) is closed, the terminal (itA) is interrupted and the microcomputer (M
CB) is activated.

(BMS) is a main switch. When this main switch (BMS) is opened, the output of the inverter (IN2) becomes “Low”, the microcomputer (MCB) stops operating, and the AND circuit (AN3) is turned off. Disabled, interrupt signal to pin (itA) is not input, microcomputer (MCB)
Is not invoked. If the power supply battery (BAB) is removed and power is not supplied from the line (VC), the AND circuit (AN3) is disabled and no interruption is performed. Therefore, when the power supply battery (BAB) is not mounted or the main switch (BMS) is open, the microcomputer (MCB) remains in the operation stop state.

The switch (S2) is a switch that is closed at the second stage of pressing the release button (2). When the release button switch (S2) is closed, the output of the inverter (IN3) becomes “High”, and the AND circuit (AN2) and the OR circuit (OR
1), the interrupt signal is output to the terminal (it) via the AND circuit (AN3).
Enter A). When this interrupt signal is input, the shutter charge is completed, and if the calculation of the exposure control data is completed, the operation immediately shifts to the exposure control operation. Note that the interrupt from the release button switch (S2) is output while the microcomputer (MCB) is exchanging data with other circuits, the output of the OR circuit (OR3) becomes “High” and the AND circuit (AN2 ) Is disabled, so no interrupt is performed.

The switch (RCS) is a back cover switch that is closed when the camera back cover (3) is opened as shown in FIG. 3 and is opened when the camera back cover (3) is closed. Therefore, when the back cover is closed, the output of the inverter (IN4) becomes “High”, a pulse is output from the one-shot circuit (OS1), the flip-flop (RF1) is set, and the terminal (itB) is connected. An interrupt signal is input. Then, the microcomputer (MCB) performs an operation when the back cover is closed, and when this operation is completed, a pulse is output from the terminal (O18) to reset the flip-flop (RF1) and enter an operation stop state.

(LE) is an interchangeable lens, connectors (CNF), (CNB
1) It is electrically connected to the camera body via the camera, and the data such as the aperture value fixedly stored in the circuit (LEC) in the lens is sent to the microcomputer (MCB) in series via the interface circuit (BOL). Is read. This operation is performed by the microcomputer (M
CB) sets the terminal (O5) to "High" and executes a serial input / output instruction, so that eight clock pulses are output from the serial clock pulse terminal (SCP). Then, data is input in series from the lens (LE) in synchronization with the clock pulse, and the data is read from the serial input terminal (SIN). By repeating this serial input command a plurality of times, all necessary data from the lens (LE) is read.

(CAD) is a code pattern circuit that outputs code pattern data provided on the film container (14), (E)
M) is a code plate that outputs data corresponding to the set exposure control mode. (SFC) is a counter switch that closes while the film counter is in the pre-winding position and opens when the filming position is reached (equivalent to FIG. 32). It is.

(BUB) is a backup battery, (CIM) is ISO
It is a circuit that stores data and reads data (CAD) from the film container, and reads mode signal and film signals from the counter switch (SFC).
A specific example is shown in FIG. This circuit (CIM) is supplied with power from a backup battery (BUB) via a diode (D21) and also supplied from a main battery (BAB) via a diode (D20). (BCC) is a circuit to check the output voltage of the backup battery (BUB), and the power supply line (VB) via the transistor (BT0)
If the output from the backup battery (BUB) is equal to or greater than the predetermined value, the signal “High” is output to the terminal (i20). (PO5) is a power-on reset circuit that outputs a reset signal when a backup battery (BUB) is installed. The reset signal from this circuit (PO5) is
It is sent only to the ISO data storage register in IM), and the contents of this register are reset only when the backup battery (BUB) is installed. Terminals (O30), (O31),
(O32) is a terminal for controlling the operation mode of the circuit (CIM), and the circuit (CIM) performs an operation according to the output of this terminal. The OR circuit (OR50) is connected to this terminal (O3
0), (O31) and (O32) are input terminals, and the output terminal is connected to the input terminal of the OR circuit (OR3). Therefore,
If data is exchanged between the circuit (CIM) and the microcomputer (MCB), interruption to the terminal (itA) by the release switch (S2) is prohibited.

In FIG. 5, (SDI) is a circuit for reading data input in series from the terminal (SOU) of the microcomputer (MCB) in synchronization with the clock pulse from the terminal (SCP), and the terminal (O30) is set to “High”. When the terminal (O30) becomes "High", the counter (LPC) that operates when "" becomes "High" counts a synchronization clock pulse, and outputs a latch pulse when eight clock pulses are counted. This latch pulse is sent to the register (LAC), and when this pulse is input, the data from the reading circuit (SDI) is latched. Register (LAC)
Is reset by a pulse from the power-on reset circuit (PO5) in FIG.

(DSC) is a data selector, and if the output of terminals (O31) and (O32) is "01", the register (LAC) from the input section (α1)
ISO data stored in the storage unit. If "10", input unit (α2)
Data on the film container from
The mode from 3) and the signal of the film counter switch are output respectively. If the outputs of the terminals (O31) and (O32) are "00", the data selector (DSC) does not output data. The serial data output circuit (SDO) is an OR circuit (OR52)
Becomes high, the data from the data selector (DSC) is sequentially output to the terminal (SIN) based on the synchronization clock pulse.

The configuration of (CAD) and (EM) in FIG. 4 is shown in FIG.

In FIG. 6, a code pattern (1) is provided on the film container (14). Are conductive parts in any film container, and in this embodiment, the grounded electrode (COT) is in contact.
Are provided with a conduction / non-conduction pattern according to the data corresponding to the ISO sensitivity of the film in the film container (14), and this example is shown in Table 1.

The contact pieces (AT2) to (AT6) are in contact with these parts, respectively. These contact pieces are connected to the input terminal (α2) of the data selector (DSC) of FIG. 5 via a pull-up resistor and an inverter.
Has been entered. In the parts (1) to (4), a code pattern corresponding to the data of the number of photographed frames of the film (60) stored in the film container (14) is provided. The contact pieces (FT8), (FT9) and (FT10) are in contact with this part,
In this embodiment, since this data is not used, the data from the contacts (FT8), (FT9), and (FT10) are not input anywhere.

, Are provided with exposure range data. This code is shown in Table 2.

, Are contacted with contact pieces (RT11) and (RT12), and a signal from these contact pieces is input to the input terminal (α2) of the data selector (DSC) via a pull-up resistor and an inverter.

(MT1), (MT2), (CMT) are the code plates for data output in the exposure calculation mode. These code plates (MT1), (MT2),
The sliding member (VT) moves on (CMT) according to the mode setting by the mode changeover switch 3. If the sliding member (VT) is at the position (P), the data of "00" is in the program mode. If the sliding member (VT) is at the position of (S), the data is "01" in the exposure time priority mode (hereinafter referred to as S mode). If the data is located at the position (A), the aperture priority mode (hereinafter referred to as A mode) indicates “1”.
If the data of "0" is at the position of (M), the data of "11" is input to the input terminal (α2) of the data selector (DSC) in the manual mode. The signal input via (IN5) is also input to the input terminal (α2) of the data selector (DSC).

Referring again to FIG. 4, (FL) is a flash light emitting device, in which a power supply battery (BAF), a light emission and control circuit (FLC), and a main switch (FMS) are provided. The flash unit (FL) is provided with a connector (CNF). When the flash unit (FL) is attached to the camera body, it is electrically connected to the connector (CNB2) and the control circuit (FCC)
Operations such as data transfer and light emission amount control are performed between them.

(LMC) is a photometric circuit. The photometric output of this photometric circuit (LMC) is input to the analog input terminal (ANI) of the microcomputer, and the reference potential for DA conversion is input to the terminal (VRI). . A display circuit (DPC) drives a liquid crystal display (LDP) for data display and a display light emitting diode (FLD) for flash photography. The display circuit (DPC) captures display data output from the terminal (SOU) while the terminal (O10) is at “High”, and performs display based on this data. Details of this display unit will be described later with reference to FIG.
(RLC) is a release circuit which releases the lock of the exposure control mechanism based on a pulse from the terminal (O12).

(APC) is an aperture control circuit, and the aperture control circuit (A
The PC) reads the data of the number of steps that is sent from the terminal (SOU) while the terminal (O13) is “High”, and stops the aperture of the camera when the actual number of steps matches the read data. Then, the aperture is determined. (TIC) is an exposure time control circuit that reads the exposure time control data output from the terminal (SOU) while the terminal (O14) is “High” and reads the data from the time when the count switch (S3) is closed. The shutter closing operation is started after a lapse of time corresponding to the data. Further, the terminal (TIE) becomes “High” when the release signal (RLS) is output, and starts the shutter closing operation for a certain period of time (for example, 50 msec).
It will be “Low” after elapse.

Next, the operation of this system will be described based on the flowchart of FIG. When power supply from the terminal (VC) starts, power supply to the microcomputer (MCB) starts and the microcomputer (MC
B) performs an initial reset operation. The flip-flop (RF1) is reset by the power-on reset signal (PR1), and the display circuit (DPC) supplied from the terminal (VC) is also reset.

First, the microcomputer (MCB) starts with the terminal (O
1)-(O4) is set to “High”, and terminals (O5)-(O18) are set to “L”.
ow ". The terminal (O31) is set to" High "and the terminal (O3
0) and (O32) are set to "Low", and the serial input / output operation is performed after a certain period of time required for the vibration due to battery attachment to subside and the contact between the contact piece and the film container to stabilize has elapsed. Then, the data on the film container from the detection unit (CAD) is read into the register IOR via the circuit (CIM), and this data is set in the register CAR. Register C
Table 4 shows how to set the data in the AR.

Next, the terminal (O32) is set to "High" to perform a serial input / output operation, and the ISC data stored in the register (LAC) is read. The read data is set in the register MER. Next, the terminal (O31) is also set to "High" to read the mode and the counter switch data, and set this data in the register MOR. Next, the input terminal (i20)
gh ", and if" High ", the output voltage of the backup battery (BUB) is sufficient, and then it is determined whether the data read from the register (LAC) is normal. If all bits are not "0", it is sufficient to determine that the battery is normal, and if the backup battery (BUB) is normal and the data from the register (LAC) is normal, the register (LAC) ) Is set in the register SVR, and the process proceeds to step # 3.

If the output voltage of the backup battery (BUB) is equal to or lower than the predetermined value in step # 1 or if normal data is not read from the register (LAC) in step # 2, the process proceeds to step # 4. Transition. In step # 4, it is determined whether or not the data from the film container has been read by determining the contents of the register CAR. If the data has been read, the ISO data based on the data from the film container is stored in the register SVR. If it is not set, the fixed data Svn (for example, ISO100Sv =
5) is set in the register SVR. Next, the content of the register SVR is set to the input / output register IOR, and the terminal (O30) is set to “Hi”.
gh "to perform serial I / O operation, and the contents of register SVR are sent to the storage register (LAC). Next, when fixed data is set, bits MDR0 and MDR7 are set to“ 1 ”. The remaining bits are set to “0.” Here, the register MDR is a register in which data indicating the display mode is set, and the meaning of each bit is as follows. It is "0" when neither the symbol nor the SS symbol is displayed, and becomes "1" when the ISO or SS symbol is displayed.

MDR1 is “1” when displaying the exposure time on the display, ISO
It is "0" when displaying data.

When displaying override data, MDR2 and MDR3 are set to “01” if the override data is on the + side, “10” if the override data is on the negative side, and “11” if the override data is 0 and the override data is displayed. When not displayed, it is "0". Therefore, if MDR2,3 is "00", no indication about override is made and "01"
If so, "+" is displayed before the override symbol "+/-" and the override data. If "10", "-" is displayed before the symbol "+/-" and the override data. If it is "11", the symbol "+/-" is displayed. At this time, 0 is displayed for the override data, and neither "+" nor "-" is displayed before the data. In addition,
The symbol "+/-" is displayed even when the exposure control value is displayed.
Displayed if MDR2,3 is "01", "10".

MDR4 is "1" when displaying the F value, and "0" when not displaying the F value. Therefore, when "1", "F" is displayed, and when "0", "F" is not displayed. MDR5, MDR
6 is a light emitting diode (F
A signal indicating the display mode of (LD) is set. When set to “00”, the flash unit is not attached to the camera body (FL
D) is off. “01” indicates that the flash device is mounted and the power is supplied, and blinks at 2 Hz. "Ten"
Indicates that the flash device is fully charged, the light emitting diode (FLD) lights up, and "11"
Indicates that dimming is complete, and the light emitting diode (FL
D) flashes at 8Hz. When MDR7 is "1", the entire liquid crystal display part blinks at 2Hz, and when "0", it lights.

Next, the contents of register SVR, data B for blank display
The contents of the LD and the register MDR are sent to the display unit (DPC), and the terminals (O2) and (O4) are set to "Low" to enable interruption to the terminals (itA) and (itB), and wait for 10 seconds. Therefore, when the power supply battery (BAB) of the microcomputer (MCB) is installed, the storage circuit (LA) supplied by the backup battery (BUB)
C) or the backup battery (BU
If the output of B) is not normal and the ISO data based on the data on the film container is not read and fixed ISO data is set, this data flashes for 10 seconds and a warning is displayed. Done. When it is determined by the bit 2 of the register MOR that the film counter switch (CFS) is open, the terminals (O2) and (O4)
To “Low”. Therefore, an interrupt signal is input to the terminal (itA) only when the ISO switch (ISS) is closed, so that the exposure control operation is not started even if the release button is operated, and the release lock state is established. To get out of this state, operate the ISO switch or wait 10 seconds. When it is determined that the film counter switch (CFS) is closed, the possibility that the film is mounted is low, and the release lock is not performed, and the control waits for 10 seconds.

After 10 seconds, the terminals (O2) and (O4) are set to “High”
Then, the process proceeds to the step # 3, and data for lighting and displaying the ISO data is sent to the display unit (DPC) to be in the “HALT” state. When normal ISO data is read from the register (LAC), this data is set, and the process immediately proceeds to the step # 3 to display the ISO lighting.
Even if the register (LAC) is not normal, when normal data is read from the film container, ISO is lit and the release lock is not activated.

FIG. 8 shows the operation when the back cover is closed and an interrupt signal is input to the terminal (itB). First, it waits for a predetermined time (for example, 0.5 sec) to elapse after the back cover is closed.
This is because the film container vibrates immediately after the back cover is closed, and the contact between the film container (14) and the contacts (15) and (16) is not stable. Next, terminals (O2), (O
3), (O4) is “High”, terminals (O1), (O5) to (O1
8), (O30) and (O32) are set to “Low”, and the terminal (O3
Set 1) to “High” to perform serial input / output operation. Thus, data from the film container is read.
Next, based on the read data, it is determined whether or not data is provided on the film container.If provided, ISO data based on this data is set in the register SVR, and the data is stored on the film container. If no data is provided, the contents of the register SVR are left as before.

Next, the bit MDR0 is set to “1”, the remaining bits MDR1 to MDR7 are set to “0”, and the contents of the register SVR, the blank data BLD,
The set ISO data is displayed by sending the contents of the register MDR to the display unit (DPC). Then, the terminal (O18) generates a pulse to reset the flip-flop (RF1),
Waiting for 5 seconds to enable interrupts to the terminals (itA) and (itB), the display is turned off and the state becomes "HALT" in the same manner as the operation from step # 3 in FIG.

Here, a specific example of the (CAR) presence determination of # 4 and # 8 will be described with reference to FIG. As shown in Table 1, in the case of a film container provided with a code pattern, at least one of the parts is always a conductive part. Therefore, "1" is set in either bit CAR4 or CAR3 of register CAR.
Is read, the setting of data from the code pattern is performed assuming that the container provided with the code pattern is mounted.

On the other hand, if both bits are “0”, it means that the film container without the code pattern is mounted or the film container is not mounted, and in this case, it is based on the contents of the register CAR. No data is set.

Next, a specific example of the operation for setting the film sensitivity in steps # 7 and # 10 will be described with reference to FIG. First, 16 _H ( _H indicates a hexadecimal number) is set in the register SVR.

Here, the registers SVR1 and SVR2 are 8 bits, and each bit is weighted from the upper bit by 16, 8, 4, 2, 1, 1/2, 1/4, 1/8. And the film sensitivity is the apex value
It changes in 1 / 3Ev units. Therefore, if the fractional part of the sensitivity of the film set in the camera is 1/3, it is approximated to 1/4, and if it is 2/3, it is approximated to 3/4 (= 1/4 + 1/2). Therefore, in step # 1, 16 bits set in register SVR1
_H corresponds to Sv = 2 2/3.

Next, first, the bits CAR4 and CAR5 of the register CAR are set to “11”.
If if "08 _H" in, "10" if "04 _H", "01" if "02 _H"
Is added to the contents of the register SVR1. Therefore, if the bit of the decimal part is “11”, Sv = 1 is added to “1E _H ”, and the decimal part is 3
Make it / 4. If the decimal part bit is “10”, Sv = v is added to “1A _H ” to set the decimal part to 1/4. If the decimal point bit is “01”, Sv = 1/4 is added and “18”. _H "to set the decimal part to 0.

Next, if bit CAR2 of register CAR is 1, Sv = 4, CAR1
Is added to the contents of the register SVR1 if Sv = 2 and CAR0 is 1 if Sv = 1. The above operation will be described with an example in which a film container of ISO 400 is mounted on a camera. In this case, as shown in Table 1, the portion indicated by, is a conducting portion. In the register CAR, the bits CAR3 and CAR2 are "1", and the CAR4, CAR1 and CAR0 are "0". Therefore, 22 _H is added to the register SVR1 to be 38 _H. This data is 4 + 2 + 1 = 7 according to the definition of the weight of each bit, and the apex value Sv = 7 in ISO400.

Next, the operation of FIG. 4 based on the flowchart of FIGS. 11-1, 2, 3, and 4 will be described. When the power supply battery (BAB) is installed with the main switch (BMS) closed,
When one of the photometric switch (S1), ISO switch (ISS), and override switch (ORS) is closed, an interrupt signal is input to the terminal (itA) via the AND circuit (AN3).
The operation from step 11 is started. First, the flag CCF
Is determined whether or not the content of “1” is “1”. This flag CCF is “1” when exposure control data is calculated, and is “0” when exposure control data is not calculated. The operation when an interrupt signal is input to the terminal (itA) while the exposure control value has been calculated will be described later.

When the flag CCF is “0”, the terminal (O1) is set to “High” next. As a result, the transistor (BT0) becomes conductive, and power supply starts from the line (VB). Further, the AND circuit (AN1) is disabled, the AND circuit (AN2) is activated, and the signal from the release switch (S2) can be input to the terminal (itA) as an interrupt signal. Next, by setting the terminals (O3) and (O4) to "Low", only the terminal (O2) is set to "High" and it is determined whether or not the terminal (i1) is "High". If the terminal (i1) is “High”, the photometric switch (S
When 1) was closed, the interruption was made,
Set the flag LMF to “1” and set the terminal (O2) to “Low”.
If the switch (SI) is open and the terminal (i1) is determined to be "Low" in step # 13, then only (O3) is set to "High" and the terminal (i1) is set to "High". " If "High" at this time, ISO switch (ISS)
When the flag ISF is set to "1" and the terminal (i1) is "Low", the interrupt is performed by the override switch (ORS), and the flag ORF is set to "1". To Then, the terminal (O3) is set to "Low", and the process proceeds to step # 14.

In the step # 14, the terminal (O5) is set to “High”. Then, data from the lens (LE) is read by performing the serial input / output operation a plurality of times (a predetermined number of times), and the read data is sequentially set in a plurality of registers LDR. When this operation is completed, the terminal (O5) is set to “Low”, and the terminal (O31),
(O32) is set to “High”. After this operation, a serial input / output operation is performed to read the mode signal applied from the code plate EM and the signal from the counter switch (SFC), set the register MOR, and set the terminals (O31) and (O32). Set to “Low”. The mode data is set to bits MOR0 and MOR1, and the signal of the counter switch (SFC) is set to MOR2. Thus, the state of the film counter and the signal of the exposure control mode are taken into the register MOR.

Next, the terminal (O9) is set to “High” and the terminal (O8) is
Output pulse of μsec width. And I / O register I
After data of “00H” is set in OR, a serial input / output operation is performed. Then, the flash device (F
L), and this data is stored in register FDR
Is set to Then, the terminal (O9) is set to “Low” and # 15
Go to step.

In step # 15, the output representing the photometric result of the subject obtained from the photometric circuit (LMC) is subjected to AD conversion.
The operation of (Bv−Avo−Avc) + Avo + Avc = Bv is performed to remove the terms of the open aperture value Avo and the open side optical error Avc included in the D-converted data based on the data from the lens (LE). Then, the subject brightness data is calculated.

Then, the calculation of Bv + (SVR) = Ev is performed, and the exposure value Ev is calculated.

Next, it is determined whether or not the contents of the bits MDR2 and MDR3 of the register MDR are “01”. If “01”, it is the override of the + side as described above, and the contents of the register ORR1 in which the override data of the + side is set. Is subtracted from the exposure value Ev to calculate the Ev value. If the contents of MDR2 and MDR3 are not "01", it is next determined whether or not it is "10". If "10", it means that the -side override has been performed, and the -side override data is set. Add the contents of register ORR2 to exposure value Ev
Calculate the Ev value.

Upon completion of the above operation, the flow shifts to step # 16, and thereafter, an operation of calculating exposure control data is performed. In the step # 16, it is determined whether or not the mode is the P mode. If the mode is the P mode, the calculation for the steady light photographing and the calculation for the flash light photographing in the P mode are performed, and the flag DCF1 is set to "0". Move to Here, the flag DCF1 is a flag that is set to "1" when the set aperture value or the set exposure time is changed, and is set to "0" when there is no change. In the P mode, neither data change is accepted. DCF1 is “0”
Becomes

If it is determined in step # 16 that the mode is not the P mode, the process proceeds to step # 19 to determine whether the mode is the A mode. In the case of the A mode, since a change in the set aperture value is accepted, this data change operation is first performed. First, the terminal (O
2) Set "High" to determine whether the terminal (i2) is "High". If the terminal (i2) is "High", the aperture setting switch (FSS) is closed. Then, the terminal (i
It is determined whether or not 3) is “High”. If “High”, the up switch (UPS) is closed. In this case, the terminal (O2) is set to "Low" and the data change operation to the small aperture side is performed. That is, it is first determined whether or not the content of the register AVR3 in which the set aperture value data is set is on the open side of the open aperture value data Avo from the lens (LE) (this data is sent from the lens ROM). I do. If the data is on the opening side of the open aperture value Avo (this occurs when the lens is replaced), the content of the register AVR3 is set to Avo, and the routine proceeds to step # 20. If the contents of the register AVR3 are not on the open side of Avo, it is next determined whether or not the value is equal to Avo. If they are equal, the data dAv from the lens (LE) is determined.
Is added to the contents of the register AVR3, and it is determined whether or not the contents of the register AVR3 are larger than the maximum aperture value data Avm from the lens (LE). Is set, and the process proceeds to the step # 20, and if not large, the process directly proceeds to the step # 20. The maximum aperture value data Avm is also sent from the lens ROM.

Here, the data dAv will be described. There are various values for the open aperture value of interchangeable lenses, and 0.5 Ev units (Avo = 0.5, 1.0,
Some are 1.5, 2.0 ...) and some are not in 0.5Ev units (for example, F2.5 (Av = 2.64), F3.5 (Av
= 3.61), F1.8 (Av = 1.7), etc.). By the way, the aperture value set on the camera side is a series of 0.5 Ev unit except for the open aperture value. Therefore, if the aperture is not in 0.5Ev units, the aperture value changes from the open aperture to the next set aperture by a value dAv smaller than 0.5Ev and becomes a value in 0.5Ev units. It changes. Therefore, F2.5
For a lens of dAv = 0.36, for a lens of F3.5 dAv = 0.39, F
For a 1.8 lens, dAv = 0.3. This data dAv
Is also sent from the lens ROM.

When the terminal (O2) is “High”, the terminal (i3)
If it is determined that the up switch (UPS) is not closed, not "igh", the terminal (O2) is set to "Low" and the terminal (O3)
Is set to "High" and it is determined from the state of the terminal (i3) whether the down switch (DOS) is closed. When it is determined that the down switch (DOS) is closed, the terminal (O3) is set to “Low” and the content of the register AVR3 is read.
It subtracts 1/2, and it is determined whether or not the result of this subtraction is on the open side from the open aperture value Avo. If the value is on the open side, set the open aperture value Avo in the register AVR3 and # 2
Move to step 0.

In step # 20, "1" is set to the flag DCF1 to indicate that the setting data has been changed, and the process proceeds to step # 21. On the other hand, if the aperture switch (FSS) is not closed, or if both the up switch (UPS) and the down switch (DOS) are not closed, no data is changed, and the flag DCF1 is set in step # 23. Sets "O" and shifts to the step # 21. In the step # 21, the calculation for the steady light photographing in the A mode is performed. Then, in the step # 22, the calculation for the flash light photographing in the A mode is performed, and then the process proceeds to the step # 24. As described above, when the A mode is selected, the up switch (UPS) and the down switch (DOS) are involved in changing the aperture value data.

If it is determined in step # 19 that the mode is not the A mode, it is determined in step # 25 whether the mode is the S mode. Then, if it is determined that the mode is the S mode, then in steps # 25 and # 26
From the state of the terminal (i2), it is determined whether or not the exposure time switch (SSS) is closed. If it is determined that the exposure time switch (SSS) is not closed, the flag DCF1 is set to "0" in step # 28, and the process proceeds to step # 29. On the other hand, if it is determined in step # 27 that the exposure time switch (SSS) is closed, then it is determined whether the up switch (UPS) is closed.
When it is determined in step # 30 that the up switch (UPS) is closed, 1 is added to the content of the register TVR3 in which the set exposure time data is set. It is determined in step # 31 whether or not this addition result is larger than the shortest exposure time data Tvm. If it is larger, Tvm is set in the register TVR3. Set 1 "and proceed to step # 29.

Up switch (UPS) not closed # 3
If it is determined in step 0, then the down switch (DO
It is determined in step # 33 whether or not S) is closed. If the down switch (DOS) is closed, 1 is subtracted from the contents of the register TVR3 in step # 34, and it is determined whether or not the result of the subtraction is longer than the longest exposure time Tvo. And for a long time Tvo
Is set in the register TVR3, and if it is not a long time, the flag DCF1 is set to "1", and the process proceeds to step # 29.

When the exposure time switch (SSS) is not closed,
Or, if both the up switch (UPS) and down switch (DOS) are not closed, the flag D
CF1 is set to “0”, and the process proceeds to step # 29. # 2
In the step 9, the calculation for the steady light photographing in the S mode is performed, then the calculation for the flash photographing in the S mode is performed, and the process proceeds to the step # 18. As described above, when the S mode is selected, the up switch (UPS) and the down switch (DOS) are involved in changing the exposure time data.

If it is determined in step # 25 that the mode is not the S mode, the mode is the M mode. In this case, both the aperture value data and the exposure time data can be changed. After the change, the calculation for the steady light photographing in the M mode and the calculation for the flash light photographing in the M mode are performed, and the process proceeds to the step # 18.

In step # 18, since the calculation of the exposure control data has been completed, it is possible to shift to the exposure control operation, and the flag
Set “1” to CCF. Then, an interrupt operation by an interrupt signal to the terminals (itA) and (itB) is enabled. Next, it is determined whether or not the currently powered flash device is mounted on the basis of data from the flash device (FL). If there is no mounted signal, the bits MDR5 and MDR6 of the register MDR are set to “00” to # 35. Go to step. If there is a mounting signal, then it is determined whether the dimming operation complete signal (hereinafter referred to as FDC signal) is input and if the FDC signal is input, bits MDR5 and MDR6 of register MDR are set to "11" Then, the process proceeds to step # 35. On the other hand, if the FDC signal is not input, it is determined whether or not the next charge completion signal is input. If the charge completion signal is input, “10” is input to the MDRs 5 and 6; 01 "is set.

In step # 35, the terminal (O9) is set to "High", and data is transferred from the camera to the flash device (FL). In step # 36, a pulse having a width of 100 μsec is output to the terminal (O8). Next, the ISO data set in the register SVR is set in the input / output register IOR, and the contents are output from the analog signal output terminal (ANO) via the DA converter. Subsequently, the serial input / output operation is performed to send the ISO data to the flash device.

Next, the contents of register AVR2, in which the aperture value data for flash photography is set, are set in register IOR and sent to the flash device, and the contents of register TVR2, in which exposure time data for flash photography is set, are set in register IOR. And send it to the flash device. Next, of the data from the lens (LE), the content of the register LDRf in which the focal length data is set is set in the register IOR, sent to the flash device, and the terminal (O9) is set to "Low". The above is the data transfer operation to the flash device. Based on these data, the flash device performs operations such as displaying an interlocking range and automatically setting an irradiation angle.

Next, in step # 40, it is determined whether or not the flag ISF is "1". If "1", it means that the ISO switch is closed, and the process proceeds to step # 43. On the other hand, “0”
Then, it is determined whether or not the flag ORF is "1" in a step # 41. And if “1”, override switch (OR
This is the case where S) is closed, and the process proceeds to step # 44. On the other hand, if it is “0”, bit M of register MOR
The contents of OR2 are discriminated, and if "0", the film counter switch (SFC) is closed and the film counter has not reached position 1 (the position of the photographable film frame), and the process proceeds to step # 52. Transition. In step # 42,
If the bit MOR2 of the register MOR is "1" and it is determined that the film counter switch (SFC) is open, the flow advances to step # 46 in this case. If, 3 is "11", it is set to "00" and MDR1 and MDR4 are set to "1". As a result, the symbol +/- is not displayed unless the override is performed,
Further, the symbols of F and SS are displayed on the display device LDP.

Next, it is determined whether or not the charging completion signal is input. If the charging completion signal is input from the flash device (FL) to the microcomputer (MCB), the exposure time for flash photography (contents of the register TVR2) and the aperture are determined. The value (contents of the register AVR2) is sent in series to the display unit (DPC), and the exposure time (contents of the register TVR1) and the aperture value (the content of the register AVR1) for steady light photography if the charge completion signal is not input Are serially sent to the display unit (DPC), and the flow shifts to the step # 49 in FIG. 11-4.

If it is determined in step # 40 that the ISO switch (ISS) is closed, the process proceeds to step # 43.

When the process proceeds to step # 43, only the terminal (O2) is set to “Hig
In step # 50, it is determined whether the up switch (UPS) is closed. Then, the up switch (UPS) is determined.
Is closed, it is next determined in step # 51 whether or not the decimal part of the manually set ISO data is 1/4. If it is 1/4, 1/2 is added, and if it is not 1/4, data obtained by adding 1/4 is set in the register SVR2. Therefore, if the decimal part is 0,
If it is 1/4, 1/4, it becomes 3/4, and if it is 3/4, it becomes 0. That is, as described above, 1/3 = 1/4, 2/3 = 3/4, and 0 = 0. And
Determine whether the contents of the register SVR2 is larger than the maximum ISO data Svm, and if it is larger than Svm, set Svm to the register SV.
Set to R2, if it is not large, leave it as it is, and proceed to step # 52.

If it is determined in step # 50 that the up switch (UPS) is not closed, the process proceeds to steps # 53 and # 54, where only the terminal (O3) is set to "High", and the down switch (DOS) is set in # 55. Is determined whether or not is closed. If the decimal part of the data set manually when the down switch (DOS) is closed is 3/4, subtract 1/2 and 3/4
If not, subtract 1/4. That is, if it is 3/4, it is 1/4, if it is 1/4, it is 0, and if it is 0, it is 3/4. Then, it is determined whether or not the content of the register SVR is smaller than the minimum ISO data Svo,
If it is smaller, Svo is set to SVR2. If it is not smaller, the process proceeds to step # 52.

If it is determined in step # 55 that the down switch (DOS) is not closed, the process proceeds to step # 52 while keeping the contents of the register SVR.

In the step # 52, the flag DCF2 is set to "1", the bit MDR0 is set to "1", the bits MDR1, MDR4, and MDR7 are set to "0", the content of the register SVR is set to the register IOR, and the terminal (O30)
Is set to “High” to perform the serial input / output operation. As a result, the newly set ISO data is fixedly stored in the storage register (LAC) (FIG. 5) in the circuit (CIM). Subsequently, the ISO data and the data for turning off the aperture value display unit are sent to the display circuit (DPC), and the process proceeds to step # 49.

If it is determined in step # 41 that the flag ORF is "1" and the override switch (ORS) is closed, the flow proceeds to step # 44. That is, step # 57
First, it is determined whether or not the up switch (UPS) is closed. If the up switch (UPS) is closed, MDR2 and MDR3 are set to “01” and the contents of the register ORR1 are set to 1/2.
Is added. Then, it is determined whether or not the content of the register ORR1 exceeds the maximum value ODm, and if it does, the ODm is set in the register ORR1, and if not, the flag DCF is set to “1” in step # 58. To step # 60.

When it is determined in step # 57 that the up switch (UPS) is not closed, the process proceeds to step # 61, in which only the terminal (O3) is set to "High", and in # 62, the down switch (DOS) is set. Is determined whether or not is closed. If the down switch (DOS) is closed, register ORR
Add 1/2 to the contents of 2, and if it exceeds the maximum value ODm, set ODm in the register ORR2. If not, set "1" to the flag DCF2 and go to step # 60. I do.

If the down switch (DOS) is not closed in step # 62, the flag DCF2 is set to "1" while MDR2, MDR3 and the registers ORR1 and 2 are kept as they are, and the process proceeds to step # 60 in FIG. 11-4. Transition.

In step # 60, it is determined whether the bits MDR2 and MDR3 of the register MDR are “00”, and if “00”, “1” is displayed for display.
MDR0, MDR1, MDR4, and MDR7 are set to "0".
Therefore, in this case, the symbol + /
-Only the symbol is displayed.

Next, the blank data (BLD) is output to the register (IOR) and further sent to the display unit (DPC) so that the numerical display unit of ISO or SS is turned off. Then, the contents of MDR2 and MDR3 are changed to “01”. If it is "+", the contents of the register ORR1 are sent to the display unit (DPC) if it is not "01" because the register ORR1 is not "01", and the process proceeds to step # 49. Next, in step # 49, register MDR
To the display (DPC) and set the terminal (O11) to “High”
The display by the light emitting diode (FLD) of the display unit (DPC) is enabled.

Next, it is determined whether or not one of the flags DCF1 and DCF2 is “1”. If “1”, the data is changed, and in this case, the data change is performed at a high speed. Wait for a certain period of time in order to prevent the situation, and then proceed to step # 65. On the other hand, if the flags DCF1 and DCF2 are both “0”, the process immediately proceeds to step # 65. In step # 65, the terminals (O2), (O3) and (O4) are set to "High" and whether (i1), (i2) and (i3) are set to "High", that is, the key switch is set to one. Determine if any of them are closed. If any one is closed, set the data for 5 seconds in the internal counter ICO,
Determine whether the main switch (BMS) is closed. If the main switch (BMS) is closed, (O2) and (O4) are set to “Low” and the switch (ISS)
Is determined whether or not is closed. And (IS
If S) is closed, the flag ISF is set to "1", the ORF and LMF are set to "0", and the process returns to the step # 14. If (ISS) is not closed, it is determined whether the switch (ORS) is closed, and if it is, ORF is set to “1”, LMF and ISF are set to “0”, and #
Return to step 14. If the switches (ISS) and (ORS) are both open, the flag LMF is set to "1" and the process returns to step # 14. Therefore, the exposure time and the aperture value are displayed for 5 seconds when none of the switches are closed.

If all the key switches are not closed, it is determined whether or not the content of the internal counter ICO is "0", and if it is "0", the flow proceeds to step # 67. On the other hand, if it is not "0", it is determined whether or not the reset switch (S4) is closed, and if not, the state of the main switch (BMS) is determined, and # 66 to # 14 are determined.
Return to step.

When 5 seconds elapse after all the key switches are opened, when the reset switch (S4) is closed, or when the main switch (BMS) is opened, the process proceeds to step # 67 and the terminal (O1), (O5) to (O18) are set to “Low”, the flags CCF, LMF, ISF, and ORF are set to “0”, and the interrupt pin (itA)
The interrupt by (itB) is enabled, the display is turned off in the same manner as the operation from step # 3 in FIG. 7, and the HALT state is set.

When the release switch (S2) is closed with the calculation of the exposure control value completed and the flag CCF set to "1", the terminal (itA)
Is accepted, and the process proceeds to step # 70.
In step # 70, the terminal (O9) is set to "High", and a pulse of 50 μsec width is output from the terminal (O8) to read data from the flash device. Then, it is determined whether or not the charging completion signal is input. If the charging completion signal is input, the content of the register PVR2 in which the aperture value for flash photography is set is sent to the aperture control circuit (APC), and the charging completion signal is output. Is input to the aperture control circuit (APC), the contents of the register PVR1 in which the aperture value for the constant light imaging is set. Next, it is determined again whether or not the charging completion signal has been input, and if it has been input, the register TVR in which the exposure time for flash photography is set is set.
2. If the input is not input, the contents of the register TVR1 in which the exposure time for steady light photography is set are stored in the exposure time control circuit (TI
Send to C).

Next, the terminal (O9) is set to “High” and the flash device (F
By sending a 150 μsec pulse from the terminal (O8) to L), the flash device determines that the exposure control operation has started. Then, the terminal (O11) is set to "Low" to turn off the light emitting diode (FLD) so that the light emission display is not performed during the exposure control. Next, a pulse is output from the terminal (O12), and the release circuit (RLC) performs the release operation of the shutter to start the exposure control operation. Then, it waits until the reset switch (S4) that operates when the exposure control operation is completed and the shutter curtain is completed is closed, and (S
4) When terminals are closed, terminals (O2), (O3) and (O4)
igh ", the flow shifts to the step # 67, and the same operation as described above is performed to enter the HALT state.

FIG. 12 is a specific example of the display circuit of FIG. When the terminal (CDP) becomes “High”, the synchronization clock pulse (SC
Each time eight P) are input, terminals (1), (2), (
The latch pulse is output from the latch control circuit (LAC) to 3). The data read by the serial input register (SIR) is sequentially stored in the registers (REG1), (REG2),
(REG3). Therefore, the register (REG1) contains the exposure time or ISO numerical data, (REG2) the aperture value or override numerical data, and (REG3) the display mode data, that is, the contents of the register MDR in the microcomputer (MCB). Is set, and the output of terminals (e0) to (e7) is
Corresponds to R bits MDR0 to MDR7.

The decoder (DE1) converts the output of the register (REG1) into a value for displaying the exposure time, and (DE2) converts the value into a value for displaying the ISO data. Then, the data selector (DS1) is connected to the terminal (e
If 1) is "High", that is, the exposure time display mode, the data from the decoder (DE1) is transmitted, and if "Low", that is, the ISO display mode, the data from the decoder (DE2) is transmitted. The decoder (DE3) converts the output of the register (REG2) into a value for displaying an aperture value, and the decoder (DE4) converts the output for displaying an override. Then, the data selector (DS2) is connected to the terminal (e
4) If "High", that is, the aperture value display mode, the decoder (DE
The data from 3) is output as "Low", that is, data from the decoder (DE4) unless the aperture value display mode. The decoder (DE5) is connected to the terminals (e0) to (e) of the register (REG3).
This is a decoder that converts the data from 4) into data for symbol display.

Timing signal output circuit (TIC) is 8Hz at terminal (j1)
(J2) outputs a 2Hz clock pulse, and further outputs a common signal output circuit (COD) and a segment signal output circuit (SE
Send the timing signal to D). The segment signal output circuit (SED) is connected to the data selectors (DS1), (DS
2) A display signal based on the data from the decoder (DE5) is output to perform liquid crystal display. If the terminal (e7) of the register (REG3) is “High”, the AND circuit (G
2) Clock pulse is output from 1) and the liquid crystal display is 2Hz
Flashes.

The signals from the terminals (e5) and (e6) of the register (REG3) and the 8 Hz and 2 Hz clock pulses from (j1) and (j2) are sent to the drive circuit (LDC), and the terminal (DPE) is set to “High”. "", A drive signal according to the state of the flash is output to the terminal (FLD).

FIG. 13 shows a specific example of display in the embodiment of the present invention. FIG. 13 (a) shows an example of a display state when the exposure time is set. The first display section, which is also used for displaying the shutter speed and the film sensitivity, has a display indicating the shutter speed of 1/2000 sec. At the same time as the second
The aperture value F5.6 is displayed on the display section. On the other hand, FIG. 13 (b) shows an example of a display state at the time of setting the film sensitivity.
The film speed ISO400 is displayed on the first display, and nothing is displayed on the second display.

[Effect of the Invention] In the camera according to the present invention, a photographing information designating member that designates one of a plurality of types of photographing information is arranged on a side different from the shutter release button with respect to the pentaprism,
On the same side as the shutter release button, there is a data change member that is involved in changing the data content of the shooting information specified by the above specified member and changing the shutter speed or aperture value according to the set exposure control mode I do. Therefore, the configuration is suitable for operating the data change member with the hand that operates the shutter release button, that is, the dominant hand of the photographer. By arranging such operation members, the following effects can be obtained.

It is possible to prevent the operation member for setting the photographing information of the camera from being concentrated near the shutter release button.

Since the data changing member is commonly used for data setting of each photographing information, it is used more frequently than the designated member, and it is necessary to frequently perform a delicate adjustment operation such as an exposure control value. Therefore, in the present invention, the data change member is preferentially operated by the hand that operates the shutter release button, that is, the dominant hand, so that the operability is very good and the data change operation can be performed smoothly. Therefore, there is no chance of missing a photo opportunity.

Use one hand to select and select shooting information, change the data of the specified shooting information with your dominant hand, then release immediately with that hand, or fine-tune the shutter speed or aperture value with your dominant hand. After that, a series of photographing operations such as immediate release with the hand can be quickly performed.

Since the data change member located on the same side as the shutter release button does not directly affect the selection of the shooting information, it may not be possible to touch the hand of the person who moves frequently to make changes while changing the data contents. Since the shooting information to be changed is not easily switched, the possibility of erroneous input can be greatly reduced. (Because the designated member and the changing member are provided on different sides with the pentaprism interposed therebetween, touching the designated member with the hand operating the changing member during the operation is prevented by this protrusion. Needless to say)

[Brief description of the drawings]

1 is a perspective view showing the appearance of a camera to which the present invention is applied, FIG. 2 is a view showing the inside of the camera of FIG. 1, FIG. 3 is a film counter and a counter switch, a back cover and a back cover open / close detection. FIG. 4 is a block diagram showing an embodiment of a camera system to which the present invention is applied, FIG. 5 is a block diagram showing a main part of the camera system of FIG. 4, and FIG. 7 is a perspective view showing a portion for reading data from the film container, FIGS. 7 to 11-1 to 11-4 are flowcharts showing the operation of the camera system shown in FIG. 4, and FIG. 12 shows another embodiment. FIGS. 13 (a) and 13 (b) are diagrams showing examples of display on the display device. 10: ISO mode key, 14: Film container, MCB: microcomputer, CAD: Film container code pattern output circuit, DSC: Data selector, DPC: Display.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayoshi Sahara 2-30 Azuchicho, Higashi-ku, Osaka City Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Masatake Niwa 2-30 Azuchicho, Higashi-ku, Osaka Osaka Inside the building Minolta Camera Co., Ltd. (72) Takeo Takarada, inventor 2-30, Azuchicho, Higashi-ku, Osaka Osaka Country Inside the building Minolta Camera Co., Ltd. (56) References JP-A-56-121020 (JP, A) JP-A-55-115026 (JP, A) JP-A-53-83737 (JP, A)

Claims (1)

(57) [Claims] 1. A camera having a projection provided with an erecting optical system, comprising: a shutter release button arranged on one side of the projection; and a shutter release button arranged on the other side of the projection. A photographing information designating member that designates one kind of photographing information from a plurality of kinds of photographing information; a data content of the photographing information designated by the photographing information designating member, which is arranged on the same side as the shutter release button; A data change member involved in changing the shutter speed or aperture value according to the set exposure control mode, and when the data change member is operated together with the designation of the photograph information by the above photograph information specifying member, the data of the photograph information is changed. The exposure control mode is set when the data change member is operated without specifying the shooting information by the shooting information specifying member. Control means for changing a shutter speed or an aperture value in accordance with the following conditions: A single-lens reflex camera.