JP2632672B2 - camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera provided with a dial operating member used to set information on shutter speed and aperture value.

(Background of the Invention) Conventionally, when the aperture of a lens is manually set, no problem occurs because an aperture ring is arranged on the lens side. However, in recent years, with the development of an autofocus lens, there has been an increasing number of systems that control the aperture from the camera side in the same manner as in automatic exposure without disposing an aperture ring in terms of space or cost.

In the above-described camera, when the exposure mode is the shutter priority or the aperture priority, the setting contents of the priority side can be changed by one operating member. However, in the manual exposure mode, the shutter time information and the aperture value information are changed. Two operation members for setting each information are required. In this case, it is of course possible to have the two operating members on the camera side, and cameras of this type are also commercially available, but not only have problems in terms of space or design, but also in terms of ease of use. Was never satisfactory. Because, above all, the setting of these information is above all the most easy to set by dial, but it is almost impossible to arrange two dials on the camera in terms of space and design. This is because it is practiced to arrange two seesaw switches and the like which are somewhat difficult to use.

(Object of the Invention) It is an object of the present invention to solve the above-mentioned problems and to provide a camera capable of setting a shutter speed or an aperture value by operating a dial operation member with extremely high operability. .

(Features of the Invention) In order to achieve the above object, the present invention provides a manual exposure mode in which shooting is performed with both shutter speed and aperture value information set by manual operation. In a camera having an automatic exposure mode in which one of the information is set as a preset information by a manual operation, and the other information is calculated based on the set preset information and the photometric value to perform photographing. A mode setting operation member for selecting and setting a manual exposure mode and an automatic exposure mode, a dial operation member for setting shutter time or aperture value information, and a pressing operation member are arranged on the camera body, and When the manual operation mode is set by the mode setting operation member and the pressing operation member is in one of a pressing state and a non-pressing state, the dial The information set by operating the dial operating member is input as shutter time information, and when the pressing type operating member is in the other state of pressing or non-pressing, the information set by operating the dial operating member is squeezed. Input as value information, and when the automatic exposure mode is set in the mode setting operation member, information set by operation of the dial operation member regardless of the state of the pressing operation member as the preset information. An information setting circuit for inputting is provided.

(Embodiment of the Invention) FIG. 1 shows a basic configuration of an embodiment of the present invention, and FIG.
The flowchart is shown in the figure.

Upon detecting that the first stroke of the release button is turned on, the control means 101 operates the timer means 102, and reads the shutter time information reading means 103 and the aperture value information reading means 104.
Is displayed on the display means 105. Thereafter, when it is detected that the first stroke of the release button is off, the timer means
It is determined whether or not the timer operation at 102 has ended. Here, since the timer operation has just started, when the manual exposure mode setting unit 106 detects that the mode is set, the pressing operation of the pressing switch unit 107 arranged on the outer part of the camera is next performed. It is determined whether or not it has been performed.

Here, when an ON signal is input because the pressing operation of the pressing switch means 107 is performed, the control means 101 controls one dial shared by the shutter time information setting and the aperture value information setting. The information set by the expression information setting means 108 is read as the aperture value information by the aperture value information reading means 104, and when the ON signal is not input, the information set by the dial information setting means 108 is The shutter time information reading means 104 reads the shutter time information. The information at this time is displayed on the display means 105. In this case, the method of reading the information in accordance with the state of the pressing switch means 107 may be reversed. Thereafter, when the end of the operation by the timer means 102 is detected, the operation control as described above is stopped.

FIG. 4 shows the arrangement of the operating members when the camera incorporating the device embodying the embodiment shown in FIG.
FIG. 6 shows the arrangement of the operating members when viewed from above, and FIG. 6 shows the arrangement of the operating members when viewed from the back. 4 to 6, reference numeral 1 denotes a release button, reference numeral 2 denotes an operation lever for selecting one of continuous shooting (C) and single shooting (S) shooting modes, reference numeral 3 denotes an operation lever for selecting a self-timer, 4
Is an exposure mode selection knob for selecting one of the exposure modes of shutter priority (Tv), aperture priority (Av), and manual (M). 5 is shutter time, aperture value, or exposure step number information at the time of auto bracket shooting ( For example, a so-called electronic dial in which two-bit conductive patterns and brushes having phases different from each other by 90 degrees are provided, and swM is a switch for setting an aperture value. In the manual exposure mode, the switch swM
By pressing the dial 5 and operating the dial 5, the aperture value can be changed. Reference numeral 6 denotes a switch cover of the storage unit 7 that stores switches that are used less frequently, swABR is an auto bracket switch stored in the storage unit 7, and swME is a multiple shooting switch also stored in the storage unit 7. It is.

Note that the auto bracket (more precisely, an auto exposure bracket) is an exposure value of a camera (in the case of automatic exposure, an exposure control value automatically calculated from subject brightness and film sensitivity, and in the case of manual exposure, ,
This means that the camera is offset with respect to the shutter time and aperture value set by the photographer. In short, it means that when a certain subject is photographed, the camera automatically takes a plurality of pictures while changing the exposure value in several steps.

FIG. 3 shows a specific example of an electric circuit using a microcomputer COM for performing a series of operation control.

The light receiving element SPC receives the reflected light from the subject, and outputs a light receiving signal to a high input impedance operational amplifier OP1 in which a compression diode D1 is connected to a feedback circuit. Operational amplifier O
P1 outputs logarithmically compressed subject luminance information Bv via a resistor R1. The variable resistor VR1 connected to the constant voltage source VG1 outputs film sensitivity information Sv. The operational amplifier OP2 in which the resistor R2 is connected to the feedback circuit calculates and outputs photometric information Ev = (Bv + Sv). Photometric information Ev is 4 by A / D converter ADC.
It is converted into a digital value of bits and input to the input ports PG0 to PG3 of the microcomputer COM.

When the dial 5 is operated, the number corresponding to the number of clicks is counted by the dial interface circuit DIF, and the value is converted into 4-bit information and input to the input ports PH0 to PH3 of the microcomputer COM. . The information in the dial interface circuit DIF is reset when a pulse signal is input from the output port PE3 of the microcomputer COM. Depending on which mode is selected by the exposure mode selection knob 4, a double exposure mode switch swSEL is turned on and off, and 2-bit information corresponding to the selected exposure mode is stored in the microcomputer COM.
Are input to the input ports PP0 to PP1.

When the battery BAT is loaded in the camera, the power Vbat is supplied to the microcomputer COM, the decoders TD, AD, FD of the display system, the dial interface circuit DIF, and the like.
Further, when the first stroke switch sw1 connected to the input port PA0 is turned on by the first stroke of the release button 1, the potential of the output port PF becomes high level, so that the transistor TRbat by the inverter INV and the resistor R4.
Is turned on, and the voltage from the power supply Vbat is supplied as a power supply Vcc to circuits that consume relatively large amounts of power, such as photometric operational amplifiers OP1 and OP2.

Microcomputer COM input ports PA1-11
The second button which is turned on by the second stroke of the release button 1
Stroke switch 2, a mirror up switch swMRUP that turns off when the mirror is up, and a mirror up switch swMRUP that turns on when the mirror is down, a charge completion detection switch swCGE that turns on when the mechanical charging is completed, and turns on every time the feeding of one frame of film is completed. The film switch swFLM is turned on, the rear curtain switch swCN2 is turned on when the rear curtain travel is completed, the self-switch swSELF is turned on when the self-timer is set by the operation lever 3, and, for example, the continuous shooting mode is selected by the operation lever 2. The switch swCS, which is turned off when the single-shot mode is selected, the switch swM for setting the aperture value, and off when the switch cover 6 is closed, the multi-shot switch swME, the auto bracket switch swABR Are respectively connected.

The bases of the transistors TR0 to TR2 are connected to the output ports PE0 to PE2 via the resistors R10 to R12.
TR2 is a first tension magnet MG0, a front curtain magnet MG1 for running the front curtain, and a rear curtain magnet MG2 for running the rear curtain.
Are controlled respectively. The bases of the transistors TR3 to TR5 are connected to the output ports PD, PC and PB via the resistors R13 to R15. The transistor TR3 drives the charge motor MD, and the transistor TR4 drives the rewind motor MC.
The transistor TR5 controls the driving of the winding motor MB for winding the film at a high speed, respectively.

The content of the shutter time information register RGTv in the microcomputer COM is output from the output port PTD to the decoder TD, and the decoder TD converts the content into a signal for shutter time display and is composed of a liquid crystal or the like connected thereto. Display SEG1
And outputs the signal.

A signal of "1" (meaning high level) or "0" (meaning low level) is output from the output ports PEL and PABR to the decoder AD, and the decoder AD outputs "1" from the output port PEL.
When the signal is input, the signal for blinking the auto bracket mark is output to the display SEG3 composed of a connected liquid crystal or the like. When a signal of “1” is input from the main port PABR, a signal for displaying an auto bracket mark is output to the display SEG3.

A signal of “1” or “0” is output from the output port PME to the display SEG4 composed of a liquid crystal or the like, and the display SEG4 displays a multiple shooting mark when the signal of “1” is input. .

From the output port PFD, the contents of the aperture value information register RGAv, the contents of the auto bracket step information register RGBR, or the contents of the multiplex number information register RGME in the microcomputer COM are output to the decoder FD. The decoder FD outputs a signal for numerical display corresponding to each of the above contents to a display SEG5 composed of a liquid crystal or the like connected thereto.

From the output port PAV, the contents of the aperture value information register RGAv in the microcomputer COM are output to the aperture control drive circuit DAV. The aperture control drive circuit DAV outputs information converted to actual aperture information to a connected driving actuator CAV, for example, a stepping motor, and drives this to perform appropriate aperture control.

Next, the operation of the microcomputer COM will be described with reference to the flowcharts of FIGS.

When the battery BAT is loaded in the camera and the power supply Vbat is generated, the microcomputer COM starts the operation from the start in the flowchart of FIG.

[Step 1] If only the first stroke of the release button 1 is performed by the photographer, the first stroke switch sw
When the ON signal of 1 is input to the input port PA0, the process proceeds to step 2.

[Step 2] A signal “1” is output from the output port PF, and the transistor TRbat is turned on to supply the power Vcc to each unit. Next, the photometric timer is started. The photometric timer is for keeping the power supply Vcc continuously supplied for a predetermined time from the input of the OFF signal of the first stroke switch sw1, so that even if the photographer releases his / her hand from the release button 1, the photometric state is maintained. Can be confirmed, and the setting information can be changed while looking at the display with the exposure mode selection knob 4. This configuration can be easily performed by a hardware timer built in the microcomputer COM.

[Step 3] The photometric information Ev exchanged into a 4-bit digital value by the A / D converter ADC is stored in the internal register RG.
Store in Ev.

[Step 4] It is determined whether or not the shutter priority mode is set based on the input state of the input ports PP0 and PP1. If the shutter priority mode has been set, the process proceeds to step S5.

[Step 5] From the contents of the register RGEv, dial 5
The content of the shutter information register RGTv that stores the information set by the operation is reduced, and the result (aperture information Av) is stored in the aperture information register RGAv. It is assumed that the contents of all registers in the microcomputer COM are retained while the battery BAT is loaded. Also batteries
When the BAT is first loaded, it is assumed that a frequently used value, for example, information of 1/125 seconds has been initialized.

[Step 6] The contents of the register RGBR storing the exposure step number information of the auto bracket are stored in the aperture step number register RGBA of the aperture. Further, the contents of the shutter bracket stage number register RGBT are set to zero (0).

[Step 7] The state of a flag FABR indicating whether or not the auto bracket mode is set is determined. If the auto bracket mode has not been set, the process proceeds to step S8.

[Step 8] The state of the flag FME indicating whether or not the multiple photographing mode is set is determined. If the multiple photographing mode has not been set, the process proceeds to step 9.

[Step 9] The flag FsAB indicating whether or not the auto bracket switch swABR has been operated is reset to 0. A flag Fs indicating whether or not the multiple shooting switch swME has been operated.
Reset ME to 0.

[Step 10] The contents of the aperture information register RGAv are output from the output port PED, and the contents of the shutter information register RGTv are output from the output port PTD. As a result, the aperture value obtained by the calculation is displayed on the display SEG5, and the set shutter time is displayed on the display SEG1.

[Step 11] The second stroke of the release button 1 is performed, and it is determined whether or not the ON signal of the second stroke switch sw2 is input to the input port PA1. If it is determined that the ON signal of the second stroke switch sw2 has not been input, the process returns to the start. Also, the first stroke switch sw
While the ON signal of 1 is being input, the routine can obtain calculation information from subject brightness information, film sensitivity information, and setting information, and display these information.

If the aperture priority mode has been set, the process proceeds to step 4 → step 12 → step 13.

[Step 13] dial 5 from the contents of register RGEv
Then, the content of the register RGAv storing the information set by the operation of the aperture value setting switch swM is subtracted, and the result is stored in the shutter information register RGTv. Note that when the battery BAT is first loaded,
For example, it is assumed that the information of F5.6 is initialized.

[Step 14] The contents of the bracket stage number register RGBR storing the exposure stage number information of the auto bracket are stored in the shutter bracket stage number register RGBT. Also, the contents of the aperture bracket stage number register RGBA are set to zero.

Thereafter, in the case of the aperture priority mode, the same sequence as in the previous shutter priority mode proceeds, and the aperture value set in step 10 is displayed on the display SEG5, and the shutter time obtained by the calculation is displayed on the display SEG1. Is displayed.

If the manual exposure mode is set, the process proceeds to step 4 → step 12 → step 15.

[Step 15] The content of the register RGTM storing the shutter time information set by the operation of the dial 5 is stored in the shutter information register RGTv. This is because when the auto bracket shooting is set in the manual exposure mode, the content of the register RGTv changes for each shooting, so that the information set by operating the dial 5 is stored as it is. I do.

Thereafter, the same sequence as in the aperture priority mode proceeds, and the aperture value set in step 10 is displayed on the display SEG5,
The set shutter time is displayed on the display unit SEG1.

Next, a description will be given of information setting by a dial operation during the operation of the photometry timer. When the pressing of the release button 1 (first stroke) is stopped in the middle of the above sequence, an off signal of the first stroke switch sw1 is input, and the program proceeds from step 1 to step 20.

[Step 20] It is determined from the state of the switch swSET whether the switch lid 6 has been opened. Switch lid 6
Is kept closed, the off signal of the switch swSET is input to the input port PA9, and the process proceeds to step 21.

[Step 21] It is determined whether the photometry timer is operating. Here, since it is immediately after the photometry timer is operated in step 2, the process proceeds to step 22.

[Step 22] It is determined whether or not the shutter priority mode is set based on the input state of the input ports PP0 and PP1. If the shutter priority mode has been set, the process proceeds to step 23.

[Step 23] Here, an information reading routine accompanying the operation of the dial 5 is executed. Here, an information reading routine accompanying the dial operation will be described with reference to FIG.

"Information reading routine" [Step 80] Information input to input ports PH0 to PH3 is stored in dial register RGH. At this time, a value corresponding to the number of clicks on the dial 5 is stored in the register RGH,
Information indicating whether the numerical value is positive or negative according to the rotation direction of the dial 5 is stored. That is, 4-bit information indicating how many steps to shift up or down from the current information is stored.

[Step 81] Output a pulse signal from the output port PE3. As a result, the value of the dial interface circuit DIF is reset to zero.

[Step 82] Return to the previous step.

 Returning again to the flowchart of FIG.

[Step 24] Numerical value (contents of register RGH) set by dial operation and shutter information (register RGTv
Of the shutter information register RGTv
To memorize. Further, the contents of the shutter information register RGTv are stored in the register RGTM.

[Step 25] It is determined whether or not a certain code indicating the valve mode located next to the longest shutter time is stored in the register RGTM. If it is not in the valve mode now, the process jumps to NEXT1, that is, to step 3.

Pressing the release button 1 in this manner (first stroke)
During the photometry timer after the stop of the setting, the setting information can be changed by operating the dial 5, and thereafter, the routine from step 3 onward is executed, so that the aperture value and the shutter time The indicator SEG1, SEG5
Can be displayed respectively.

If the aperture priority mode is set, the process proceeds to step 22 → step 26 → step 27.

[Step 27] Here, similarly to the stap 23, an information reading routine accompanying the operation of the dial 5 is executed.

[Step 28] The numerical value (contents of the register RGH) set by the dial operation and the aperture value information (contents of the register RGAv) are added, and stored again in the aperture information register RGAv. Also, in the case of the aperture priority mode, the process jumps to NEXT1, that is, to step 3, and displays the aperture value and the shutter time at step 10 as in the shutter time priority mode.
SEG1 and SEG5 can be displayed respectively.

If the manual exposure mode is set, the process proceeds to step 22 → step 26 → step 29.

[Step 29] The on / off state of the aperture value setting switch swM is determined. Since the aperture value setting switch swM is operated in the manual exposure mode and the dial operation is performed, the aperture value can be changed, and the shutter time can be changed by performing only the dial operation. When the switch swM is ON, the process proceeds to the execution of the same routine (step 27) as in the aperture priority mode,
When it is off, the routine proceeds to the execution of the same routine (step 23) as in the shutter priority mode.

When a predetermined time elapses after the pressing operation of the release button 1 is stopped, the photometric timer operation ends. Accordingly, the program proceeds from step 21 to step 30.

[Step 30] The outputs of the output ports PTD, PFL, PABA, PME, and PFD are set to “0”, and all the displays on the indicators SEG1 to SEG5 (however, the indicator SEG2 does not exist) are turned off. Also, the output of the output port PF is set to “0”, the transistor TRbat is turned off, and the power supply V
Stop supplying cc.

[Step 31] As in step 9, both the flag FsAB indicating whether the auto bracket switch swABR has been operated and the flag FsME indicating whether the multiple shooting switch swME has been operated are reset to zero.

Then the program jumps to the start. Therefore,
After the photometry timer ends, the standby mode of step 1 → step 20 → step 21 → step 30 → step 31 is repeated.

Next, the case of setting the auto bracket code will be described. Before that, the case where only the opening operation of the switch lid 6 is performed for setting the auto bracket mode will be described.
When the switch cover 6 is opened, the switch swSE operates in conjunction with it.
T turns on, and this on signal is input to the input port PA9. Then, the program proceeds from step 20 to step 40.

[Step 40] The auto bracket switch swABR is determined. Since the switch lid 6 has just been opened and the operation of the auto bracket switch swABR has not been performed, the process proceeds to step 41.

[Step 41] The multi-shot switch swME is determined.
Similarly, since the multiple photographing switch swME has not been operated, the process proceeds to step 42.

[Step 42] A flag FsME indicating whether or not the multiple photographing switch swME has been pressed is determined. Battery BAT
Since the flag FsME has been reset to 0 in step 9 in the loading initial state and when the first stroke switch sw1 is on, the process proceeds to step 43.

[Step 43] A flag FsAB indicating whether or not the auto bracket switch swABR has been pressed is determined. As in step 42, step 9 sets the flag
Since FsME has been reset to 0, the process jumps to step 21.

In this manner, nothing is executed if the switch lid 6 is opened and only the ON signal of the switch swSET is input.

Next, from the state described above, the auto bracket switch swABR
The following describes a case where the pressing operation is performed once. When the auto bracket switch swABR is pressed, an ON signal is input to the input port PA11 accordingly. Then, the program proceeds from step 40 to step 44.

[Step 44] It is determined whether or not the content of the register RGTM is in the valve mode. If it is in the valve mode, it returns to the start and does not enter the auto bracket mode. If the valve mode has not been set, the process proceeds to step 45.

[Step 45] The flag FsAB indicating that the auto bracket switch swABR has been turned on is set to 1, and the flag FsME indicating that the multiple shooting switch swME is turned on is set to 0.
Reset to.

[Step 46] The outputs of the output ports PTD, PFL, PABR, PME, and PFD are set to “0”, and the displays on the indicators SEG1 to SEG5 are all turned off. Next, set only the output of the output port PABR to “1”, and
Turn on the auto bracket mark of SEG3. This allows the photographer to clearly know that the auto bracket mode has been set.

[Step 47] A flag FABR indicating that the auto bracket mode has been set is set to 1.

[Step 48] Similar to step 23 or step 27,
An information reading routine associated with the operation of the dial 5 is executed. In this case, in step 80, for example, dial 5
If step number information of 0.5 is set by, `` −0.
If the number of stages is set to 5,0,0.5 and 1 is set, "-1,
The preset three auto bracket shootings in which the exposure is automatically changed at the number of steps of "0, 1" are performed. Note that the photographing with the number of steps of “−0.5,0,0.5”
Shooting is performed using three exposure values: an exposure value that is -0.5 stops below the standard exposure value calculated by the calculation, a standard exposure value, and an exposure value that is 0.5 steps above the standard exposure value. It means that it is performed continuously.

[Step 49] The contents of the bracket stage number register RGBR and the contents of the dial are added and stored in the register RGBR again. As described above, it is assumed that the minimum resolution by one click of the dial 5 can be freely set every 0.5 steps or every step. If the shutter time is different from the resolution of the aperture value, a program for increasing the contents of the register RGBR to an integral multiple may be inserted. Here, since it is not related to the present invention, detailed description is omitted. The contents of the register RGBR are output from the output port PFD, and a numerical value indicating the number of stages, for example, “0.5” is displayed on the display SEG5. The decoder FD and the display SEG5 used at this time are also used for the aperture display, and the aperture value is decoded by the number of F-numbers from the apec value Av, and the auto bracket is decoded by, for example, every 0.5 steps. Therefore, if the output from the output port PFD has, for example, 5 bits, 32 types of data can be sent. If F32 is 0.5 steps, 14 kinds in total, and if Auto Bracket display is 0 to 5 every 0.5 steps, there are 11 kinds in total, 30 kinds, 31 kinds including blank code, and data is output to output port PFD. By adding a certain constant at the time of transmission, the decoder FD can determine which information the information is, and an appropriate numerical display is possible.

[Step 50] A flag FME indicating whether or not the multiple photographing mode is set is determined. When the mode is not the multiple shooting mode, the process returns to the start. If the mode is the multiple shooting mode, the process proceeds to step 51.

[Step 51] The content of the multiple shooting number register RGME is set to “3”. This is because the number of times of auto bracketing is determined in advance to be three times, so that even if the number of times of multiplex shooting is set arbitrarily, it is forcibly set to three times to prevent a photographer's operation error and to prevent erroneous exposure. This is to eliminate the danger.
Then the program returns to the start. Also switch once
After the swABR ON signal is input,
Because the flag FsAB is set to 1 in step 40, even if the swABR off signal is input, the program proceeds from step 40 to step
The procedure proceeds from step 42 to step 43 to step 48, so that the auto bracket step number change mode on the dial 5 can be maintained, and the photographer can operate the dial 5 with the pressing operation of the switch swABR stopped. Become.

The release of the auto bracket stage number change mode can be performed by turning on the first stroke switch sw1, or closing the switch cover 6 and turning off the switch swSET. That is, when the ON signal of the first stroke switch sw1 is input, Step 1 → Step 2 → Step 3 →
The program proceeds, and the flag FsAB is set to 0 in step 9.
And the display is also switched to the normal display in step 10. When an off signal of the switch swSET is input, Step 20 → Step 21 → Step 30 → Step 31
In the course of the program, the auto bracket mark disappears in step 30 and the flag FsAB
Is not reset and the process does not proceed to the automatic bracket stage number change mode again.

Next, the exposure calculation in the auto bracket mode will be described. In the shutter priority mode, the contents of the bracket stage number register RGBR are stored in the aperture bracket stage number register RGBA as described in step 6, and in the shutter priority mode and the manual exposure mode, the shutter is performed as described in step 14. Each is stored in the bracket stage number register RGBT. In step 7, since the mode is the auto bracket mode and the flag FABR is set to 1,
Proceed to step 52.

[Step 52] It is determined whether or not the contents of the bracket stage number register RGBR are zero. If the content is zero, three shootings are performed with the same exposure (standard exposure in the embodiment), and since it is meaningless, it is necessary to prohibit the auto bracket shooting. So in this case step
Go to 53.

[Step 53] Flag indicating auto bracket mode
Reset FABR to 0. Also, the output of the output port PABR is set to “0”, and the auto bracket mark display is turned off.

Next, by proceeding to step 8, the exposure calculation of the auto bracket is not performed, the flag FsAB is reset to 0, and the normal routine is executed.

In step 52, a register for the number of bracket stages
If the content of RGBR is not zero, it is necessary to perform the exposure calculation and the display of the auto bracket mark based on the step number information.

[Step 54] The output of the output port PABR is set to "1", and the auto bracket mark is displayed. This is because when the switch swSET is turned off by closing the switch lid 6 from the auto bracket mode setting state, all the display is turned off in step 30, so it is necessary to turn on the light again when the first stroke switch sw1 is turned on. Because there is.

[Step 55] It is determined whether or not the first stroke switch sw1 is turned on. If it is on, go to step 56.

[Step 56] The content of the aperture information register RGAv and the content of the aperture bracket stage number register RGBA are added, and stored in the register RGAv again. Also, shutter information register RG
The contents of Tv and the contents of the shutter bracket stage number register RGBT are added and stored in the register RGTv again. this is,
In the shutter priority mode, the calculated aperture information is changed, and in the aperture priority mode, the calculated shutter time information is changed according to the number of auto bracket steps. That is, if the number of auto bracket steps is set so as not to be a negative number at the time of step 49, the value after the calculation at step 56 is an exposure value on the under side with respect to the standard exposure value.
Also, in the manual exposure mode, since the shutter passes through the step 14 similar to the aperture priority mode, the shutter time is changed, and the aperture value is not changed unlike the conventional camera, so that
It is possible to perform auto-blat photography in which only the exposure is switched with a constant depth of field.

In step 55, the first stroke switch sw1
When it is determined that is turned off, the exposure calculation in step 56 is not performed and the standard exposure value is displayed in step 10 because the photometric timer is in operation. Even in this case, since the first stroke of the release button 1 is always performed at the time of photographing, step 56 is always passed, and there is no problem in auto bracket photographing.

As described above, in the auto bracket mode, when the first stroke switch sw1 is turned on, the exposure value in a state where the auto bracket is applied, that is, the exposure value on the under side is displayed in this embodiment, and the photometry timer operation is performed. In the middle, the standard exposure value is displayed. This allows the photographer to easily recognize the exposure value of the auto bracket.

Next, a case where the valve mode is set by operating the dial 5 after the auto bracket mode is set will be described. Since bracket photography in bulb photography is basically meaningless, it is more effective to cancel the auto bracket mode. Therefore, if it is determined in step 25 that the mode is the valve mode, the process proceeds to step 57.

[Step 57] The output of the output port PABR is set to “0” to turn off the auto bracket mark display. Also, the flag FABR of the auto bracket mode is reset to 0.

Next, the case of setting the multiple shooting mode will be described. When the ON signal of the switch swME is input in conjunction with the opening of the switch lid 6, the process proceeds from step 41 to step 60.

[Step 60] The flag FsME indicating that the multiple image capturing switch swME has been turned on is set to 1. Also, the flag FsAB indicating that the auto bracket switch swABR is turned on is set to 0.
Reset to.

[Step 61] The outputs of the output ports PTD, PFL, PABR, PME, PFD are set to “0”, and all displays are turned off. Next, the output of only the output port PME is set to “1”, and the multiple shooting mode mark is displayed on the display SEG4.

[Step 62] Set the flag FME indicating the multiple photographing mode to 1
Set to.

[Step 63] It is determined whether or not the mode is the auto bracket mode. If the mode is the auto bracket mode, the process proceeds to step 64.

[Step 64] Since the mode is the auto bracket mode,
As in step 51, the number of multiple shots is forcibly set to three, that is, the content of the multiple shot number register RGME is set to "3".

If the auto bracket mode has not been set in step 63, the process proceeds to step 65.

[Step 65] As in Step 48 and the like, an information reading routine accompanying the dial operation is executed.

[Step 66] The contents of the multiplexing number register RGME and the contents of the dial register RGH are added and stored in the register RGME again. Since the number of times of multiplexing is an integer, if the resolution of one click of the dial 5 is 0.5 steps, the contents of the dial register RGH are doubled and then added. Although it is necessary to prevent the contents of the register RGH from becoming a negative number, it is omitted here.

[Step 67] The contents of the multiplex number register RGME are output from the output port PFD and displayed on the display unit SEG5.

Then the program returns to the start. Also, once the switch swME ON signal is input, the flag FsME is set to 1 in step 60, and then the switch swME
Step 41 → Step 42 even if the ME off signal is input
→ Proceeding to step 63, it is possible to maintain the multiplex shooting number setting mode. To switch from the auto bracket stage number change mode to the multiple shooting setting mode, use the switch sw
You only need to turn on the ME once, and switch the reverse
It is clear from the flow of FIG. 7 that swABR needs to be turned on once.

Next, when the number of multiplexing is set once, and then the number of multiplexing is set to zero (0), it is necessary to cancel the multiplex photographing mode and turn off the multiplex photographing mark. This program is executed by proceeding to step 68 since the flag FME is set to 1 in step 8.

[Step 68] If the content of the multiple image taking number register RGME is zero, the process proceeds to step 69.

[Step 69] The flag FME indicating the multiple photographing mode is set to 0.
Reset to. Also, set the output of output port PME to “0”,
Turn off the display of the multiple shooting mark.

If the content of the multiple shot number register RGME is not zero in step 68, the process proceeds to step 70.

[Step 70] The output of the output port PME is set to “1” to display the multiple shooting mark. This is because all the display is turned off in step 30, so that when the first stroke of the release button 1 is performed again, the photographer is informed that the camera is in the multiple photographing mode.

 As described above, the preparatory stage of photographing is completed.

Next, a sequence after the second stroke of the release button 1 is performed will be described. When the second stroke of the release button 1 is performed and the ON signal (release signal) of the second stroke switch sw2 is input to the input port PA1,
The process proceeds from step 11 in FIG. 7 to step 100 in FIG.

[Step 100] It is determined whether or not the auto bracket mode is set based on the state of the flag FABR. If the mode is the auto bracket mode, the process proceeds to step 101; otherwise, the process proceeds to step 102.

[Step 101] The output of the output port PFL is set to “1”, and the auto bracket mark on the display unit SEG3 blinks. Thus, the photographer can know that the auto bracket photographing has started.

[Step 102] Self-switching SELF on input port PA6
It is determined whether or not the ON signal is input. If the ON signal has been input, the photographing is performed by the self-timer, so the flow proceeds to step 103; otherwise, the flow proceeds to step 104.

[Step 103] The self-timer measures 10 seconds.

[Step 104] The content of the aperture information register RGAv is output from the output port PAV. As a result, the aperture control drive circuit DAV converts the content of the register RGAv into actual aperture information, and starts aperture control via an aperture driving actuator CAV such as a stepping motor.

[Step 105] A pulse signal is output from the output port PE0, the transistor TR0 is turned on, and the first fixed combination magnet MG for mirror-up is used.
Energize to 0. Thereby, the mirror is raised by a known spring force.

[Step 106] It is determined whether or not the ON signal of the switch swMRUP for detecting the mirror-up end is input to the input port PA2. Here, this loop is repeated until the ON signal is input, that is, until the mirror is completely moved up.

[Step 107] Since the content of the shutter information register RGTv is an apex value, it is converted (expanded) into real-time data.

[Step 108] A pulse signal is output from the output port PE1, and the transistor TR1 is turned on to supply electricity to the shutter front curtain magnet MG1. As a result, the shutter front curtain runs.

[Step 109] It is determined whether or not the content of the register RGTM is in the valve mode. If the valve mode is set, go to step 110; otherwise, go to step 111.
Proceed to.

[Step 110] Wait until an off signal of the second stroke switch sw2 is input. This is because in the valve mode, it is necessary to keep the shutter open while the ON signal of the second stroke switch sw2 is being input.

[Step 111] Since the mode is not the valve mode, step 1
In step 07, the real time is counted based on the expanded data, and the calculated shutter time is counted.

[Step 112] When the real-time counting is completed, a pulse signal is output from the output port PE2, and the transistor TR2 is turned on to supply electricity to the shutter rear curtain magnet MG2. As a result, the rear curtain of the shutter runs.

[Step 113] It is determined whether or not the ON signal of the shutter rear curtain switch swCN2 is input to the input port PA5. Here, this loop is repeated until the ON signal is input, that is, until the traveling of the rear curtain of the shutter is completed.

[Step 114] The output of the output port PAV is set to “0”.
As a result, the aperture returns to the open state.

[Step 115] The output of the output port PD is set to “1”, and the transistor TR3 is turned on to rotate the charge motor MD for mirror down and shutter charge.

[Step 116] It is determined whether or not the multiple shooting mode is set based on the state of the flag FME. If in the multiple shooting mode, go to step 117; otherwise, go to step 1
Continue to 20.

[Step 117] Subtract 1 from the content of the multiplexing number register RGME and store it again in the register RGME.

[Step 118] It is determined whether or not the content of the multiplex number register RGME is zero. If zero, step 119
If not zero, go to step 121.

[Step 119] The content of the multiplex number register RGME is 0
Means that the multiple photographing has been completed, the flag FME indicating the multiple photographing mode is reset to 0. Further, the output of the output port PME is set to “0”, and the display of the multiple shooting mark is turned off.

[Step 120] The timer for film feeding is started. Further, the output of the output port PB is set to “1”, and the transistor TR5 is turned on to rotate the film feeding motor MB.

If the multiple photographing mode is continued, the contents of the multiplex number register RGME are not zero, so that the process proceeds from step 118 to step 121, and since the film does not pass through step 120, the film is not fed. Therefore, multiple photographing is performed. When the multiple photographing is completed, the content of the register RGME becomes zero, so that the film is fed in step 120 after the multiple photographing mode is released as described above.

[Step 121] It is determined whether or not the ON signal of the charge completion detection switch swCGE is input to the input port PA3. When the ON signal is not input, that is, when the charging is not completed, the process proceeds to step 123, and when the charging is completed, the process proceeds to step 122.

[Step 122] Since charging is completed, the output of the output port PD is set to “0”, and the power supply to the charging motor MD is cut off.

[Step 123] It is determined whether or not the on signal of the switch swFLM, which is turned on each time one frame of film is completed, is input to the input port PA4. If the ON signal has not been input, that is, if the feeding of one frame of film has not been completed, the process proceeds to step 124, and if completed, the process proceeds to step 125.

[Step 124] The state of the film feeding timer is determined. When the film is over, no more film can be fed, so the switch swFLM does not turn on,
In such a case, the time counting by the film feeding timer, which is a one-second timer, for example, ends. When the timing is completed, the process proceeds to step 150, and when not completed, the process returns to step 121,
The above-described sequence (step 121 → step 123) is repeated.

[Step 125] If it is detected in step 123 that the off signal of the switch swFLM has been input, the output of the output port PB is set to “0”, the transistor TR5 is turned off, and the film feeding motor MB is stopped.

[Step 126] It is determined whether or not the auto bracket mode is set based on the state of the flag FABR. If the mode is not the auto bracket mode, the process proceeds to step 132, and if so, the process proceeds to step 127.

[Step 127] It is determined whether or not the auto bracket shooting has been performed three times. As described above, the auto bracket shooting is a shooting that is continuously performed at three exposure values of under, standard, and over. If the three shootings are not completed, the process proceeds to step 128.

[Step 128] The contents of the aperture bracket step register RGBA are subtracted from the contents of the aperture information register RGAv, and stored again in the register RGAv. Also, the contents of the shutter bracket stage number register RGBT are subtracted from the contents of the shutter time information register RGTv, and again the register RG is used.
It is stored in Tv. Here, the same program may be used in the shutter priority, the aperture priority, and the manual exposure mode as in step 56 in FIG. 7 because the contents of the registers RGBA and RGBT are changed in steps 6 and 14. It will be apparent from this arithmetic expression (subtraction expression) that the standard exposure is obtained in the second shooting and the overexposure is obtained in the third shooting.

[Step 129] Register RGA from output ports PFD and PTD
The contents of v and RGTv are output, and the respective shutter time information and aperture value information at this time are displayed.

Next, the program jumps to NEXT2, step 104. In other words, regardless of the on / off state of the second stroke switch sw2 (regardless of whether or not the release signal is generated), the next photographing is started. In addition, even if the photographing at this time is in the self mode, the second and third photographing starts the next photographing without executing the self-timer.

[Step 130] It is determined whether or not the off signal of the first stroke switch sw1 is input. At this time, if no off signal is input, step 128, step 12
You can see the display calculated in 9. In other words,
At this time, the final overexposure value can be confirmed. Therefore, by seeing the first underexposure value in the discrimination display in step 55, it is necessary to confirm all the exposure displays of the underexposure value, the standard value, and the overexposure value during the auto bracket shooting in the shooting sequence. Becomes possible. When the off signal of the first stroke switch sw1 is input, the process proceeds to step 131.

[Step 131] The flag FABR indicating the auto bracket mode is reset to 0. Also, the output of the output port PFL is set to “0”, and the blinking display of the auto bracket mark is turned off.

Next, the program returns to the start and enters the standby mode.

Next, the case where the mode is not the auto bracket mode will be described. In this case, since the flag FABR is 0, the step
From 126, proceed to step 132.

[Step 132] Switch sw input to input port PA7
It is determined whether the mode is the continuous shooting mode or the single shooting mode from the on / off state of CS. In the case of the continuous shooting mode, the process returns to the start. In this case, the release button 1 is pressed, and
Since the ON signal of the second stroke switches sw1 and sw2 has been input, the next shooting is started. In the case of the single shooting mode, the process proceeds to step 133.

[Step 133] Wait for the OFF signal of the first stroke switch sw2 to be input. Since the single shooting mode is set, the process does not proceed to the next shooting sequence unless the photographer stops pressing the release button 1. When the off signal is input, the process returns to the start.

Next, the case where the film is completed during the photographing will be described. In this case, as described above, the time measurement by the film timer, for example, a one-second timer is terminated.
4. Go to step 150 from 4.

[Step 150] The output of the output port PC is set to “1”, and the transistor TR5 is turned on to rotate the rewind motor MC. Thereby, rewinding of the film is started.

[Step 151] A rewind timer used to detect whether or not rewinding of the film is completed is started.

[Step 152] It is determined whether the state of the film switch swFLM has changed. Step 151 if it changes
Return to and restart the rewind timer. If there is no change, the process proceeds to step 153.

[Step 153] It is determined whether or not the time counting in the rewind is completed. If not, the process returns to step 152.

As can be seen from the above, the loop of steps 152 and 153 proceeds during the feeding of one frame, and when the completion of feeding of one frame is detected, the process proceeds from step 152 to step 151. When rewinding the film, this loop is executed. Will repeat. After that, when all the films are caught in the patrone,
For example, the patrone stops rotating and the film switch
The state change of swFLM disappears. When this is detected, the process proceeds to step 154.

[Step 154] The output of the output port PC is set to “0”, the transistor TR5 is turned off, and the rewind motor MC is stopped. Thereby, the rewinding of the film is completed.

[Step 155] The flag FABR indicating the auto bracket mode is reset to 0. Also, the output of the output port PFL is set to “0”, and the blinking display of the auto bracket mark is turned off.

 Then the program returns to the start.

Also, if the film ends in the middle of auto bracket shooting, that is, three consecutive shots should be taken normally, but if the film ends in the middle, a step is taken for the first or second frame.
You enter the routine after 150. In such a case, if the shooting of the newly loaded film auto bracket continues, there is a risk that the subject will be different or the photographer may misunderstand. It is desirable to release the bracket mode. Looking at this in the flowchart of FIG.
When the film ends after the flashing display of the auto bracket mark is made in 101, the process automatically shifts to film rewinding. During the rewinding of the film, the blinking display of the auto bracket mark has not been released yet. Therefore, by displaying an auto bracket mark that is not normally displayed during the film rewind,
The photographing difference can indicate that the film has ended without the auto bracket shooting being completed. That is, the warning is displayed. In addition, since the flag FABR indicating the auto bracket mode is reset to 0 in step 155, there is no inconvenience that the auto bracket photographing is continued on the newly loaded film as in the conventional camera.

According to the present embodiment, when the exposure mode is the manual exposure mode, the shutter time is changed by operating the dial 5, and the dial 5 is pressed while pressing the aperture switch swM.
Since the aperture value can be changed by performing the above operations, there is no problem in terms of space and design, and each information setting can be performed with the dial 5. It will be easy. Further, since the configuration is as described above, the dial interface circuit DIF may be the same as the conventional one, and the circuit load can be reduced.

(Effects of the Invention) As described above, according to the present invention, in the manual exposure mode, the setting of the shutter time and the aperture value are switched by pressing or non-pressing the pressing-type operation member. At the time of the manual exposure mode, first, the shutter operation is set by a dial operation while the pressing operation member is not operated, and when setting the aperture value after the shutter time setting, only the pressing operation of the pressing operation member is performed. Because the aperture value is set by the dial operation of
The setting of the shutter speed or the aperture value can be performed with extremely high operability by operating the dial operation member.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart thereof, FIG. 3 is a circuit diagram showing a microcomputer and peripheral circuits embodying the embodiment shown in FIG. 1, and FIG. FIG. 5 is a top view, FIG. 6 is a back view, and FIGS. 7 to 9 are flowcharts. 1 Release button, 2, 3 Operation lever, 4 Exposure mode selection knob, 5 Dial, 6 Switch lid,
7… Storage section, swABR …… Auto bracket switch, s
wME: Multiple shooting switch, COM: Microcomputer, 101: Control means, 103: Shutter time information reading means, 104: Aperture value information reading means, 107: Pressing switch means, 108: Dial Expression information setting means.

Claims (1)

(57) [Claims] 1. A manual exposure mode in which shooting is performed with both shutter time and aperture value information set by manual operation, wherein one of the shutter time and aperture value information is set as preset information and manual operation is performed. In the camera having an automatic exposure mode for performing shooting by calculating the other information based on the set preset information and the photometric value, the manual exposure mode and the automatic exposure mode are selected and set. A mode setting operation member, a dial operation member for setting shutter time or aperture value information, and a pressing operation member are arranged on the camera body, and a manual exposure mode is set by the mode setting operation member. If the push-type operating member is in one of a pressed state and a non-pressed state during the operation, information set by operating the dial operating member is displayed. When the pressing type operating member is in the other state of pressing or non-pressing, information set by operating the dial operating member is input as aperture value information, and the mode setting operation is further performed. An information setting circuit for inputting information set by operating the dial operating member as the preset information regardless of the state of the pressing type operating member when the automatic exposure mode is set in the member is provided. And the camera.