JPS60173531A - Camera - Google Patents

Abstract

PURPOSE:To convert quickly and easily a set value by providing a shutter speed and diaphragm value display device in a finder, and also providing a shifting means for shifting a display value of one of them to a desired value in accordance with the indication of a direction indicating device in the finder. CONSTITUTION:A photographer can select easily the combination of a desired shutter second time and a diaphragm value by confirming visually a correct diaphragm value displayed in a finder and a shutter second time value displayed by a shutter display disk 354, after turning on a sub-power source switch SW1'. Subsequently, when the shutter button of a camera is pushed, first of all, a power source switch SW1 turns on, a power source controlling transistor E1 also turns on, an electric conduction is fed to a circuit. A luminance of an object to be photographed is made incident on a photodetector P.D. through a lens, and a logarithmically compressed value VBV0 (Bv0=Bv-Av0-Avc) of the luminance of the object to be photographed is outputted from a photometric circuit L.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for determining exposure conditions of a camera, and particularly, the shutter speed and aperture value of equal EV values according to subject brightness and film sensitivity are both displayed in the viewfinder, and In a camera equipped with an exposure control means in which either the shutter speed or the aperture value is controlled according to the brightness of the subject, either one of the values displayed in the viewfinder can be set to the desired value by indicating the direction in the viewfinder. The present invention generally relates to an apparatus for determining exposure conditions for a camera, in which a shift means for shifting the shutter speed up to a maximum of 100 degrees is configured such that either the shutter speed or the aperture value can be set by the shift means.

In conventional cameras, the procedure for determining exposure conditions is as follows:
In the case of shutter speed priority automatic exposure control, by setting the shutter dial to the desired value and putting the camera into metering mode, such as by turning on the metering switch, the camera's automatic exposure device will operate and the aperture will be determined according to the brightness of the subject. Ru. In this case, if the shutter speed setting value is inappropriate for the subject brightness (overexposure or underexposure), or if the aperture value determined corresponding to the shutter speed is not in accordance with the photographer's intention, It is necessary to reset the shutter speed, operate the shutter dial again, determine whether the exposure is within the appropriate exposure range or the desired aperture value, and move on to the next photographing procedure.

Furthermore, in a camera with aperture-priority automatic exposure control, it will be understood that similar means are required if the aperture value and shutter speed in the explanation of the camera with shutter-speed priority automatic exposure control are interchanged. .

It is easy to understand that resetting the aperture value or shutter speed is a cumbersome operation, takes time, misses a photo opportunity, and impedes the photographer's intention to create an image. In addition, in order to avoid the above-mentioned drawbacks, the conventional method is to make the diameter of the shutter dial relatively large, place it facing the outer edge of the camera's housing, press the pad of your finger against it, rotate it, and press it against the inside of the viewfinder. There are also cameras that are configured so that the shutter speed can be changed without taking your eyes off the field of view. However, in the case of such a camera, improving the operability of the shutter dial inevitably causes the shutter dial to rotate inadvertently, and it is difficult to achieve sufficient effectiveness due to the conflicting interests. has not brought about

The present invention has been made in view of the two drawbacks of cameras that employ conventional exposure determining devices. By providing a shift means that allows shifting to a desired value according to the instructions of the device, and operating this shift means in place of the conventional shutter dial or aperture ring, it is possible to quickly and reliably change the set value, and furthermore The main idea is to provide an interlocking means that operates the display device and the direction indicating device only while the shift means is being operated, and also to save power in a camera that only has a small power source, thereby eliminating the various drawbacks mentioned above. It's all something to overcome. Furthermore, by operating the shift means, a shutter speed priority camera can be used with almost the same usability as an aperture priority camera (and vice versa).
It also has the secondary effect of -2.

The method described above is useful when determining the shooting aperture opening by setting priority on the amount of light emitted by the flash device, or when determining the amount of light emission from the flash device by setting priority on the shooting aperture opening. is also applicable.

The present invention will be explained in detail below with reference to Examples.

FIG. 1 is an external perspective view showing an embodiment of a camera body using the exposure condition determining method of the present invention.

In the figure, 101 is a shutter speed or aperture value display, which displays the shutter speed value if the camera has shutter priority, or the aperture value if the camera has aperture priority. These displays are also displayed in the viewfinder. 102 is a shift knob which will be described later, and 02' is its lock button. The parts other than the above are arranged similarly to a known single-lens reflex AE camera.
is the release button, 104 is the winding lever, 1.05 is the rewinding crank, 106 is the film sensitivity setting dial,
107 is an accessory shoe, and lO8 is a lens mount.

FIGS. 2, 3, and 4 show an example of a shutter-priority AE camera using the exposure condition determination method of the present invention.
The figure shows the display inside the funder. 20 in the diagram
1 is a shutter time display window, and 354 is a shutter time display disc. Reference numeral 203 denotes an aperture value display scale plate, and a meter pointer 204 obtained from the photometric calculation results displays the aperture value. Reference numerals 205 and 206 are warning display marks that light up when the aperture value obtained from the calculation result exceeds the control limit, and the direction of the arrow indicates a shift direction, which will be described later.

FIG. 3 is a configuration diagram showing the main parts of the internal mechanism of the shutter priority AE camera according to the present invention, and the figure shows a state in which winding is completed.

□ In the figure, 301 is the aperture ring, and this aperture ring 30
1 is engraved with an automatic aperture AE index and a manual aperture index.

302 is an index for matching the automatic aperture AE index and the manual aperture index. Reference numeral 303 denotes an aperture preset ring, and this aperture preset ring 303 is biased to rotate in one direction by a spring 303a.
It has a protrusion 303b that can be engaged with the protrusion 301a of 1. Further, the aperture preset ring 303 is provided with an arm 303c, and the aperture preset ring 303 is further provided with an arm 303c.
The amount of rotation of the bell crank is determined by an installed lever 303d via an aperture setting cam ring (not shown), and this bell crank controls the rotation of an aperture drive ring (not shown) to control the opening of the aperture. It's up to you to decide.

Reference numeral 304 denotes a pin implanted in the aperture drive ring, and the end of this pin 304 engages with an automatic aperture lever 305 that is biased to rotate in the counterclockwise direction by a spring 305a. This automatic aperture lever 305 has a rising portion 305c. Further, an intermediate lever 307 is pivotally mounted on the same shaft 306 of the automatic aperture lever 305 . 308 is a winding shaft of a winding lever (not shown), and a winding cam 3 is provided on the end surface of this winding shaft 308.
09 is fixed.

310 is a rotatable intermediate lever, and this intermediate lever 31
The pin 310a provided at one end of the winding cam 30
9 is engaged. Further, a pin 310b is provided at the other end of the intermediate lever 310, and this pin 310b engages with one end of the intermediate lever 307 and one end 311a of the mirror drive lever 311. Further, the first tensioning lever 313 is charged by a pin 310C provided on the intermediate lever 310. This intermediate lever 3
The other end of 07 can be engaged with a pin 312a provided at one end of a rotatable charge lever 312. This charge lever 312 is urged to rotate counterclockwise by a spring 312d. Mg2 is an electromagnet with a first tensioning permanent magnet, which engages with one end 313a of the first tensioning lever 313, and a pin 313b implanted at the other end is connected to the release lever 3.
14 is engaged with one end 314a. This lever 313
is rotated clockwise by a spring 313C. Furthermore, when the lever 310 is rotated clockwise, the pin 310c is caused by one end 313d of the lever 313 to rotate the lever 313 counterclockwise against the spring 313c. A pin 314b is implanted at one end of the release lever 314, and this pin 31
4b, one end 315 of a mirror drive engagement lever 315 (7) engaged with one side 311c of the mirror drive lever 311;
The other end 315a having b is locked. The end portion 314d of the release lever 313 has a rotatable AE
One end of the locking lever 316 is locked. Further, this release lever 314 is urged to rotate clockwise by a spring 314f. Also, the spring 314f is the spring 313C.
It is also a weak spring.

318 is an AE sector gear, and this sector gear 318 is locked to the other end of the locking lever 316.

This sector gear 318 includes gears 319a and 319b forming a speed regulating mechanism 319' and a stop wheel 319.
C is engaged. Further, the sector gear 318 includes a slider 3 of variable resistance RΔay for determining the aperture preset value.
18b is attached. A gear 320 is attached to the shaft 318a of which sector gear 318, and an AE charge gear 321 meshes with this gear 320. A lever 327 is fixed coaxially to this gear 321, and this lever 327 is attached to the other end 312 of the charge lever 312.
It is in contact with e. The center gear 318 has pin 3.
18d is implanted, and the end surface of this pin 318d is fixed to a signal lever 329 which is pivotally connected to the support lever 328. The bent end of this signal lever 329 locks the arm 303C of the aperture preset ring 303. The AE sector gear 318 is strongly biased clockwise by the spring 303a against a spring 318c on the sector gear 318, which is biased counterclockwise.

Mgl is a magnet for aperture control, and this magnet) Mg
When l is not energized, no attraction force is applied. In addition, when the above-mentioned magnet) Mg2 and the magnet) Mg3 described below are magnets with permanent magnets and are energized, the magnetic force acts in the opposite direction to the magnetic force of the permanent magnet, resulting in a state where there is no attractive force as a whole. This is the result. Therefore, when the magnet M g 1 is not energized, it is locked by the Mg holding lever 350 biased by the spring 350a. This suction lever 330 is rotated counterclockwise by a spring 331a, and one bent end of the lever 330 is connected to the stop wheel 319c of the speed regulating mechanism 319.
can be engaged with. Further, the other end step portion 312f of the charge lever 312 is in contact with the other end of the suction lever 330.

The mirror drive lever 311 has a delay device (not shown), and the mirror drive lever 311 has a sling 311.
d in the counterclockwise direction, one end is locked to the other end 315b of the mirror drive engagement lever 315, and the other end is engaged with one end of the leading curtain tensioning lever 333. It is located in The leading curtain tensioning lever 333 is urged to rotate counterclockwise by a spring 333a, and its tip engages with a planting pin 334a of the leading curtain gear 334. Also, a pin 334b planted on the leading gear 334
is connected to the count start switch SW4.

This front curtain gear 334 is connected to the front curtain drum tip 1 &
It meshes with the pinion 335. Further, a mirror tensioning lever 33 is attached to the tensioning portion 311b of the mirror drive lever 311.
6 is locked. This tightening lever /< -336 is rotated counterclockwise by a spring 336a passed between the mirror drive levers 311, and one end of the mirror drive lever is attached to a permanent magnet for shutter control by its iron piece 340a. It is designed to be attracted to the magnet Mg3. This suction lever 340 is always supported by a spring 340b so as to be rotatably held by the magnet Mg3. Reference numeral 341 denotes a trailing curtain signal lever that is rotated by the pin 339a, and this lever 341 is always rotatably held at the position of the locking pin 341b by a spring 341a. An end portion 336b of the mirror tensioning lever 336 is locked to the trailing curtain signal lever 341. Light transmitted through a photographic lens (not shown) passes through a mirror 338.degree. focusing plate 342, a condenser lens 343, and a pentaprism 344 in this order, and is visually recognized by the photographer through an eyepiece 345. P and D are light receiving elements such as silicon photocells (SPC). 3
47 is a shutter button, and the first stroke of the shutter button 347 turns on the switch SW1, and the second stroke turns on the switch SW2.

LEDI and LED2 are light emitting diodes for displaying the aperture control limit and are placed in a part of the finder system.

351 is an ASA dial, Rsv is a variable resistor for inputting the film sensitivity value, 352 is a mask equipped with an aperture display board and a shutter speed value display window, 353 is a meter, 35
4 is a shutter time value display board, 356 is a shutter time value display board, and 357 is a "string" for transmitting the rotation angle to the shutter time value display board 354, and the shutter time value display board 354 is connected to the tension of the spring 354a. It is rotated by the string 356 against it.

Reference numeral 358 denotes an information prism, which is attached to the pentaprism 344 and guides the shutter speed value and the aperture value into the optical path of the camera lens. 357, in which the market price in seconds can be read on the top and side surfaces, and is housed in a transparent case (not shown).

MO is a motor for rotating the shutter time indicator, which rotates the shutter indicator 357 and the shutter time contact piece 357a via gear trains 359a and 359b, thereby setting a variable resistor RTV. 360 is a shift knob, which slides left and right on the drawing, and presses the contact lever 36.
Switch SW3 on 1. 362 is a lock button of the shift knob 360, and by pressing the spring member 363 provided on the back side of the contact piece lever 361, the spring member 3
63 is disengaged from the main body recess, the shift knob 360 can be slid, and the sub power switch S W l' is turned on.

Next, FIG. 4 is a circuit connection diagram showing an embodiment of the shutter priority AE camera shown in FIGS. 2 and 3 according to the method of the present invention. In the figure, U is the first tension release circuit and power supply holding circuit, It and I2 are inverters, G is a NAND gate,
FF is a flip-flop. W is photometry and calculation.

Memory display, constant voltage circuit, A2. A3 is an operational amplifier (hereinafter referred to as an operational amplifier), CPl.

CF2 is a comparator, L is a photometric circuit, P, D.

is a light receiving element, M and E are memory circuits, M and T are aperture display meters, and VREF is a constant voltage circuit.

RsV is the film sensitivity setting resistor, RAVC is the aperture correction resistor, RA V6 is the aperture compensation resistor, Ril, R
i2. Ri3 is the input resistance, Rf2゜Rf3 is the feedback resistance,
RM is a meter correction resistor. X is an aperture control circuit, and a comparator CP3 compares the output 4 from the photometry circuit W with the value of the aperture interlocking resistance RΔAv to control the aperture control magnet (Mgl). Ri4
is the input resistance. Y is elongation.

The time control circuit controls the shutter speed control magnet Mg3 based on the output from the unique buffer amplifier A1. RTV is a second time setting resistor, and Rfl is a feedback resistor.

C2 is a magnet for controlling the time. As mentioned above, Mg3 is a correductor for supplying current, and is charged by the resistor R2. SW4 is a count switch that is linked to the front curtain tension shown in FIG. 3, and is turned off when the front curtain is running.

Mg2 is the first tensioning magnet controlled by the first tensioning control circuit U, and as mentioned above, the magnetic force generated when the current from the capacitor Ct is supplied to Mg2 is applied to the permanent magnet formed integrally with Mg2. By canceling the magnetic force, the lever 313 shown in FIG. 3 is released from the lock when energized. R1 is a resistance for charging the capacitor CI.

DAT is a power supply battery, Z is a circuit that uses a motor to drive the shutter speed indicator, which is a feature of the present invention, 5 Mo is a motor for second shift, SW3 is a second shift switch, and shift knob 360 in Fig. 3 is used. It is linked to. S
W l' is the sub power switch, and when the lock button 362 in Fig. 3 is pressed, the input number of the seconds shift switch SW3! The switching transistor E1 is previously turned on.
conduction.

Here, if SW3 is switched to the U terminal, the transistor Tri
, Tv2 turns on, then Tv3 turns on and motor M
O rotates the shutter speed indicator 357 in FIG. 3 in the UP direction. Also, when SW3 is switched to the D terminal, Tv4.
TR5 is on, Tre is on, motor MO is DOW
Rotate in the N direction.

Next, the operation of the shutter priority AE camera according to the method of the present invention will be explained with reference to FIGS. 2, 3, and 4.

First, in order to set the desired shutter speed, press the shift knob lock button 362 provided on the shift knob 360 in FIG. W l' is turned on.

As a result, the power switching transistor E1 in FIG.
The base potential of is lowered and El becomes conductive.

In this state, the photometry circuit detects the light receiving elements P and D.

Bv of Bvo=By-Avo-Avc due to the signal from
o signal is output, and the signal of V TV set by the shutter timing resistor RTV and the above-mentioned Bv.

A signal based on is calculated by amplifier A2.

At the same time, respective signals are inputted by the film sensitivity setting resistor Rsv and the aperture F value curvature correction setting resistor RA V C,
Calculated. That is, the subject brightness, shutter speed, film sensitivity, and aperture are Bv, Tv, and Tv, respectively, according to the apex display.
Sv, Av.

Furthermore, the open F value is Avo, and the number of aperture steps from the open F value is Av.
-Avo is △Av, and the amount of bending correction according to the aperture F value according to the photometry method is Awe, then Av + Tv = By
+Sv, the number of aperture stages ΔAv is calculated as follows: ΔAv = Av-Avo = (By-Avo-Av
c) +5v-Tv+Avc.

However, Bvo=By-Avo-Avc is the output of the light receiving element subjected to TTL photometry.

The ΔAv signal output from the memory circuit is sent to the operational amplifier A.
3, the open F-number signal Avo is input and displayed as the aperture value Av in the finder using Meta-MT.

In this way, after turning on the sub power switch S W l', visually confirm the appropriate aperture value displayed in the viewfinder and the shutter speed value displayed by the shutter display disc 354 in FIG. The photographer can easily select a desired combination of shutter speed and aperture value. That is, when it is desired to shift the shutter speed in the viewfinder to the high speed speed side, the shift knob 360 in FIG. 3 is slid to the right in the drawing. With this operation, SW3 is switched to the U terminal, and as described above, the motor Mo rotates the shutter speed indicator 357 shown in FIG. 3 to the high speed side through Tri and TR3 shown in FIG. . Also, when you want to shift the shutter speed to a lower speed side,
If you move the shift knob to the left side of the drawing, the T
r4. The motor Mo rotates the shutter speed indicator 357 shown in FIG. 3 to the low speed side via the Tr6.

This operation can be performed not only when you simply want to shift the shutter speed, but also when you want to shift the aperture value displayed on the meter in the viewfinder using the slide knob.

Furthermore, in FIG. 4, the output from the memory circuit ME is input to comparators CPI and CP2, and when ΔAv exceeds the control range, CPI operates on the under side, and LED 1
lights up, and on the over side, CF2 works and LED2 lights up.

These two LEDs are arranged at the bottom of the pentaprism as shown in Fig. 3, and when lit, they illuminate an arrow-shaped mask and indicate the sliding direction of the slide knob 360 in the viewfinder as shown in Fig. 2. .

9 Then press the camera shutter button.

First, the power switch SWI is turned on. As a result, the power supply control transistor El is also turned on, and the circuit is energized. The brightness of the object is incident on the light receiving elements P and D through the lens, and a value VBv is obtained by logarithmically compressing the brightness of the object by the photometry circuit.

(Bvo=By-Avo-Avc) is output. At the same time, the value V T v corresponding to the shutter speed, and the resistance value R3VIRA corresponding to the film sensitivity and aperture correction.
The current flowing to VC is calculated by amplifier A2 and VΔAM is output.

This output VΔAV is applied to the circuit via the memory circuit 2, and 1. RAV c corresponding to the aperture correction is generated by the amplifier A3.
) is calculated, vAv is output, and the display aperture value Ay is displayed on the meter MT.

2. Compare whether it is within the lower limit interlocking range using the comparator CPI, and if it is outside the interlocking range, turn on LED l.

3. The comparator CP2 compares whether or not it is within the 1-limit interlocking range, and turns on LED2 if it is outside the interlocking range.

Next, when the shutter button is further pressed, the relay release switch SW2 is turned on. In this state, ■ When winding is completed, SW5 is off, so the output of NAND gate G is “
becomes 0゛, sets F, F, Q output is “1”, Q
The output becomes "0°". With Q=O, the base current of the power supply control transistor E1 is sucked to keep El on.

Further, it is held by latching the memory circuit with Q=1. Also, with Q=1, the output of inverter I2 becomes 0°', and by turning on the tensioning magnet (Mg2), the first tensioning is released and the camera starts operating.

2. When the winding is not completed, the FF is reset by turning on the switch SW5 and becomes inactive. When winding is completed, when the tensioning magnet Mg2 is turned on, the first tensioning lever 313 is rotated clockwise by the spring 313c. That is, one end 314b of the release lever 314 is rotated counterclockwise by the pin 313b of the first tension lever 313 against the spring 314f.

As a result, the mirror drive engagement lever 315 is rotated by the pin 314b.
The details will be explained later. Also, release lever 31
4, the locking lever 316 rotates counterclockwise and disengages from the sector gear 318.
The holding lever 350 rotates to the right together with the release lever 314, and the rotation of the sector gear 318 moves the signal lever 329 downward via the pin 318d, so the aperture preset that stops the arm 303C on the signal lever 329 is performed. The ring 303 has a spring 318c due to the spring 303a.
The sector gear 318 is rotated clockwise against this.

Therefore, the gears 2 319a, 319b, and 319c forming the speed regulating mechanism 319 rotate, and the stop wheel at the final stage is rotated counterclockwise. Also, due to the rotation of the sector gear 318, the slider 3 of the variable resistance RΔA'V
18b is moved.

The output ΔAv of the memory circuit ME in FIG. 4 is compared with this resistance value by a comparator CP3, and when it reaches a predetermined level,
The current to gl is cut off and the iron piece 331 is released. Therefore, the suction lever 330 is rotated counterclockwise by the spring 331a, and its bent portion engages with the stop wheel 319c to stop the rotation of the stop wheel 319c. Therefore, the position of sector gear 318 is determined. Therefore, as described above, when the sector gear 318 stops rotating, the aperture preset ring 303 is rotated to the position of the appropriate aperture value, thereby determining the position of the bell crank. In other words, the stop position of the aperture preset ring 303 is the aperture value determined by the information from the light receiving element FD that measures light through the photographic lens, the various information settings, the shutter speed, and the film sensitivity exposure correction information3. be. On the other hand, in parallel with the start of such AE operation, the automatic throttle mechanism also starts. That is, the first tension lever 31
3 is rotated clockwise by the spring 313c, and the release lever 314 is rotated counterclockwise, whereby the end 3 of the mirror drive engagement lever 315 is rotated via the pin 314b.
15a rotates clockwise. That is, the one side 311c of the mirror drive lever 311 and the one end 315b of the mirror drive engagement lever 315 are disengaged, and the mirror drive lever 311 rotates counterclockwise due to y<, +311a. At the same time, the claw 1311b of the mirror drive lever 311 and the tension lever 336 are in a locked state, so the tension lever 336 is locked.
36 is pivoted, the push-up lever 337 rotates counterclockwise. Therefore, the bent portion 337b of the push-up lever 337 causes the rising portion 305 of the automatic throttle lever 305 to
C, and the automatic aperture lever 305 is rotated clockwise. This operates a pin 304 installed in the aperture drive ring to narrow down the aperture according to the preset position of the bell crank. Further, by rotating the push-up lever 337 counterclockwise, the flip-up pin 338a of the mirror 338 is pushed up, and the mirror 338 is flipped up.

A delay device (not shown) operates together with this flip-up operation of the mirror 338, and after a delay time of the delay device, the front curtain tensioning lever 333 is rotated clockwise by the mirror drive lever 311. The delay time provided by this delay device is for starting the shutter after the time has elapsed from the maximum aperture to the minimum aperture. For this reason, front curtain gear 33
4 starts rotating and runs the leading curtain via the leading curtain pinion 335. As the leading curtain runs, the count start switch SW4 is turned off by a known method, and after a time determined by the variable resistor RTv having a resistance value corresponding to the set shutter speed, the control circuit Y is activated and a pulse is applied to the excitation coil Mg3. . For this reason, the magnetic force of the permanent magnet and the magnetic force of Mg3 (magnet) cancel each other out and lose the attractive force.
Since the lock on the trailing curtain gear 339 is released, the trailing gear 339 starts to rotate and causes the trailing curtain to travel via the trailing curtain pinion 340. Also, at the end of trailing curtain travel, trailing curtain gear 3
The rear curtain signal lever 34 is activated by the rotation of 39 at the bin 339a.
1 rotates counterclockwise to rotate the mirror tensioning lever 336 clockwise. This rotation of the mirror tension lever 336 releases the engagement with the mirror drive lever 311.

Therefore, the push-up lever 337 is rotated clockwise via the automatic aperture lever 305 by the spring 305a.

The mirror 338 is returned to its original position by a return spring 338C. At the same time, the automatic aperture lever 305 is activated by the spring 305a.
The planting pin 30 of the aperture drive ring is rotated counterclockwise by
4 returns to the original open state. Then, when the winding operation is performed by the winding shaft 308, film winding and shutter charging are performed, and the intermediate lever 308
The charge lever 312 is charged via 10 and 307, and the automatic diaphragm mechanism and mirror mechanism are charged.The disengaged portion of the release 6 is reengaged and returned to the state shown in the figure. .

In the embodiment of the present invention shown in Figure 2.3.4 above,
Although the function of shifting the shutter speed is driven by an electric motor, FIG. 5 shows another embodiment of the present invention in which a mechanical drive is used instead of the motor drive. That is, FIG. 5 is a main part mechanical diagram showing another embodiment of the shift mechanism in the exposure condition determination method of the present invention, in which the shutter priority AE
This is applied to cameras. In the figure, 501 is the outer housing of the camera, and 502 is a shift knob, which can be slid left and right by pressing the lock button 503. 50
3 is a lock button, and if this is not pressed, the member 503a and the outer casing 5
01 is disengaged from the part 501a, and the shift knob 5
02 can be slid left and right. At the same time, the end 503b of the lock button 503 turns on the sub power switch SWI'. Also, the tip 503C of the ratchet I/claw 542 is released from the ratchet 509c.

7 504 is a spring for returning the lock button 503, and when the shift knob 502 is returned to its original position after the shift operation is completed, the lock button 503 is also returned to its original position by this spring. Furthermore, 505a,
Reference numeral 505b is a return spring that returns the shift knob to the neutral point after the shift knob is operated. 506 engages with the camera outer casing 501 and is rotatably coupled to the shift knob 502;
a connecting lever 5 that transmits the movement of the link lever 507 to the link lever 507;
07 is a link lever connected to the connecting lever 506 through a slidable long groove and supported by a shaft 507a;
The movement of the shift knob 502 is transmitted to 0g. gear 50
8 receives the movement of the link lever 507 through the pin 508a and transmits the rotation to the shutter dial 509b. 508a is a bottle movably installed on the gear 508, and 508b is a spring 505a for moving the bottle 508a in one direction.

This spring is strongly biased compared to 505b, and is used to protect the mechanism when the shift knob 502 is suddenly operated. These 508a and 508b are arranged on the left and right sides of the link lever 507. The bin 508a engages with a portion 507b of the link lever 507, converting the sliding movement of the shift knob 502 into rotational movement. 509a is an m-increasing gear that engages with gear 508;
509b is a shutter dial having a shutter seconds scale, and is integrally constructed with the gear 509a.

509C is a ratchet and after the shift operation is completed, the instruction plate 509
Fix b. 509b is a contact that slides on the resistor of the information input resistor, 509e is a gear that rotates the shutter dial 509b in response to the rotational movement of the gear 515, and 509a to 509e are integrally configured with one or more of them. It is pivotally supported on a base plate 514. Reference numeral 510 is a window on the outer casing of the camera for displaying the characters on the indicator plate 509b to the photographer, and 511 is an information input resistor for inputting shutter time information to the circuit, which is disposed on the main plate 514. A resistor is provided on the substrate. 512 is a ratchet pawl, and in order to stop the rotation of 509a to 509d, a ratchet 509 is used.
c and is pivotally supported by the base plate 514, and is engaged with the tip 503c of the lock button 503 and removed from the ratchet. A spring 513 is disposed at one end of the ratchet pawl 512 and biases the ratchet pawl 512 so that the pawl portion of the ratchet 512 engages with the teeth of the ratchet 509C. 514 is a base plate that pivotally supports each of the above-mentioned members. Reference numeral 515 denotes a gear, and when it is desired to move the shutter dial in a power-off state, this is pushed in the direction of the arrow as shown in the figure to engage gear 515 and gear 509e and rotate it. Reference numeral 516 is a lever that slides integrally with the gear 515 and is used to remove the ratchet pawl 512 from the ratchet 509C. In addition, 517 is the gear 515 and gear 509 when the finger for operation is removed from the gear 515.
This is a spring for releasing the engagement with e and returning it downward together with the lever 516.

The operation of the apparatus shown in FIG. 5 having the above configuration will be explained.

0 To shift the exposure information (in this example, the shutter speed), press the lock button 503 to shift the exposure information to 50.
S W l' is turned on (power is turned on) at part 3b, and the ratchet pawl 512 is removed from ratchet 509c at part 503C, leaving the shutter dial 509d free. Also, part 503a is removed from 501a of the camera outer casing, and the shift knob 502 can be moved left and right.For example, the shutter speed can be changed to 115 as shown in the drawing.
If you want to raise it from 00 to 1/2000, push the shift knob 502 to the left, the communication lever 50B moves to the left, and turn the link lever 5.07 counterclockwise.

The link lever 507 rotates to a position where the shutter speed is 11,500, engages with the pin 508a at the 11,500 position, and rotates the gear 508. The rotation of the gear 508 is transmitted to the gear 509a, which rotates the shutter dial 509b, and the sliding contact 509d connects to the information input resistor 51.
1. Slide on the top. When you release your fingers from the shift knob 1 knob 502 and the lock button 503 after shifting, the shift knob 502 and shift knob return springs 505a and 5 are released.
05b returns to the neutral position, the lock button 503 is returned by the return spring 504, 501a and 503a engage, locking the shift knob 502, and 503
b releases SW1' and turns off the power.-5030 is released from the ratchet pawl, and the ratchet pawl 512 jumps into the ratchet 509c by the force of the spring 2, fixing the shutter dial 509b.

When turning only the shutter dial when the power is off, use your finger to move the gear 515 in the direction of the arrow and push the spring 517 as shown by the dotted dots.
When pushing the camera from the outer casing 501 against the
At the same time, the ratchet pawl 12 is removed from the ratchet 509c, and the shutter dial 509 is engaged.
Free b. By moving the finger left and right in this state, the shutter dial 509b can be moved to a desired position. When you release your finger after setting the desired position, the gear 51
5 and the gear 509e, the ratchet pawl 12 jumps into the ratchet by the spring 513 and fixes the shutter dial 509b.

Next, FIGS. 6, 7, and 8 show an example of an aperture-priority AE camera using the exposure condition determination method of the present invention.
The figure shows the display in the viewfinder. Figure 6 shows the shutter time display in Figure 2 replaced with the aperture value display, and the aperture value display replaced with the shutter time display. 602 is the shutter time display. meter pointer, 6
03 is the shutter time display board, 604 is the aperture value display window,
Reference numeral 754 is a display disc, and 605 and 606 are warning display marks when the aperture exceeds the limit value. In addition, 605.60
The arrow 6 indicates the shift direction by the shift knob.

FIG. 7 is a block diagram showing the main parts of the internal mechanism of the aperture-priority AE camera according to the present invention, and shows the completed state of winding. In FIG. 0, the same parts as in FIG. 3 are designated by the same reference numerals. In FIG. 7
02 is an index for matching the automatic aperture AE index and the manual aperture index. Reference numeral 303 denotes an aperture preset ring, which is rotatably biased in one direction by a spring 303a and has a protrusion 303b that can be engaged with the protrusion 301a of the aperture ring 301. . In addition, an arm 303 is attached to the aperture preset ring 303.
C is provided, and the aperture preset ring 303 determines the amount of rotation of the bell crank via an aperture setting cam ring (not shown) using a lever 303d installed therein. It controls the rotation and determines the aperture opening. Reference numeral 304 denotes a pin implanted in the aperture drive ring, and the end of this pin 304 engages with an automatic aperture lever 305 that is biased to rotate counterclockwise by a spring 305a. This automatic aperture lever 305 has a rising portion 305C. Further, an intermediate lever 307 is pivotally mounted to the automatic aperture lever 305 by 4 degrees on the same shaft 306. 308 is a winding shaft of a winding lever (not shown), and a winding cam 309 is fixed to the end surface of this winding shaft 308.

310 is a rotatable intermediate lever;
A pin 310a provided at one end of the hoisting cam 30
9 is engaged. Further, a pin 310b is provided at the other end of the intermediate lever 310, and this pin 310b engages with one end of the intermediate lever 307 and with one end 311a of the mirror drive lever 311. Also, a pin 310c provided on the intermediate lever 310 charges the first tensioning lever 313. This intermediate lever 3
The other end of 07 can be engaged with a pin 312a provided at one end of a rotatable charge lever 312. This charge lever 312 is urged to rotate counterclockwise by a spring 312d. Mg2 is an electromagnet with a first tensioning permanent magnet that engages with one end 313a of the first tensioning lever 313, and a pin 313b implanted at the other end is connected to the release lever 31.
4-5 It is engaged with the end 314a. This lever 313 is urged to rotate clockwise by a spring 313c. Also, when the lever 310 rotates clockwise, the pin 310c
spring 3 by one end 313d of lever 313(7)
13c, the lever 313 is rotated counterclockwise. A pin 314b is implanted at one end of the release lever 314, and the other end 315a of the pin 314b has one end 315b of the mirror drive engagement lever 315 engaged with one side 311c of the mirror drive lever 311. It is locked. and release lever
A rotatable locking lever τ316 is provided at the end 314d of 313.
One end of is locked. Also, this release lever 31
4 is rotated clockwise by a spring 314f. Further, the spring 314f is a weaker spring than the spring 313c. 318 is a sector gear, and this sector gear 318 is locked to the other end of the locking lever 316.

This sector gear 318 includes gears 319a and 319b forming a speed regulating mechanism 319 and a stop wheel 319c.
are meshing. Further, the sector gear 318 includes a slider 31 of variable resistance RΔAV for determining the aperture preset value.
8b is installed. A gear 320 is attached to the shaft 318a of this sector gear 318, and this gear 32
The AE charge gear 321 is engaged with the gear 0. A lever 327 is coaxially fixed to this gear 321, and this lever 327 is in contact with the other end 312e of the charge lever 312. The sector gear 318 has a pin 318d.
is planted, and now the end face of the n 318d is attached to the support lever 3.
It is fixed to a signal lever 329 which is pivotally connected to 28.

The bent end of this signal lever 329 locks the arm 303C of the aperture preset ring 303. The sector gear 318 has a spring 318c which is biased to rotate counterclockwise on the sector gear 318 by the spring 303a.
It is strongly urged to rotate clockwise against the

Mgl is a magnet for aperture control, and this magnet) Mg
When 1 is not energized, no suction force is applied. Moreover, the above-mentioned magnet) Mg2
The magnet Mg 3, which will be described later, is a magnet with a permanent magnet and when it is energized, a magnetic force acts in the opposite direction to the magnetic force of the permanent magnet, resulting in a state where there is no attractive force as a whole.

Therefore, when the magnet M1 is not energized, the Mg holding lever 350 is energized by the spring 350a.
It seems to be locked by. This suction lever 33
0 is rotated counterclockwise by a spring 351a, and one bent end of the lever 330 is connected to the speed regulating mechanism 3.
It can be secured to the No. 19 stop wheel 319c. In addition, the charge lever 3 is attached to the other end of the suction lever 330.
12 is in contact with the other end step portion 312f.

The mirror drive lever 311 has a delay device (not shown), and the mirror drive lever 311 has a spring 31.
1d in the counterclockwise direction 8, one end is locked to the other end 315b of the mirror drive engagement lever 315, and the other end is placed in a position where it can be engaged with one end of the leading curtain tensioning lever 333. It is located. The leading curtain tensioning lever 333 is urged to rotate counterclockwise by a spring 333a, and its tip engages with a planting pin 334a of the leading curtain gear 334. Also, front curtain gear 334
A pin 334b is implanted on the top and is engaged with the count start switch SW4.

The leading gear 334 meshes with a leading pinion 335 of a leading drum (not shown). Further, a mirror tensioning lever 336 is attached to the tensioning portion 311b of the mirror drive lever 311.
is locked.

This tensioning lever 336 is urged to rotate counterclockwise by a spring 336a hooked between the mirror drive levers 311, and one end engages with a push-up lever 337 coaxially supported by the mirror drive lever 311. are doing. One end 337a of the push-up lever 337 is configured to be rotated clockwise by an external mirror-up operation (not shown) and can independently raise the mirror. The other end of this push-up lever 337 locks a flip-up pin 338a provided on a mirror 338. This mirror 338 is rotatable around a mirror shaft 338b.

338C is a mirror return spring.

Reference numeral 339 denotes a rear curtain gear coaxially provided separately from the front curtain gear 334, and this rear curtain gear 339 meshes with a rear curtain binion 339' for a rear curtain drum (not shown). Further, a pin 339a is installed on the rear curtain gear 339. 34
0 is a suction lever rotated by the pin 339a,
This attraction lever 340 is adapted to be attracted to Mg3, a permanent magnet material for shutter control, by its iron piece 340a. This adsorption Renovation 340 is Magnetsu) M
The rotation is always held by a spring 340b at g3.

Reference numeral 341 denotes a trailing curtain signal lever that is rotated by the pin 339a, and this lever /<-341 is always rotated and held at the position of the locking pin 341b by the knob 341a. An end portion 336b of the mirror tensioning lever 336 is locked to the trailing curtain signal lever 341. Then, the transmitted light from a photographing lens (not shown) passes through a mirror 338, a focusing plate 342, a condenser lens 343, and a pentaprism 344 in this order, and is visually recognized by the photographer through an eyepiece 345. P is a light receiving element such as a silicon blue cell. 347 is a shutter button, and the first stroke of the shutter button 347 turns on the switch SW1, and the second stroke turns on the switch SW2.

351 is the ASA dial, R8v is a variable resistor for inputting the film sensitivity value, 352 is a mask with an aperture display board and shutter speed display window, 353 is a meter, 754 is an aperture value display board, and 356 is an aperture display In order to convey the rotation angle of the device 757 to the aperture value display plate 754, the aperture value display plate 7 is
54 is rotated by a string 356 against the tension of a spring 754a. Reference numeral 358 denotes an information prism, which is attached to the pentaprism 344 and guides the time value and aperture value into the finder optical path.

The diaphragm display device may have the same configuration as 101 shown in Figure 1, or it may have a configuration as shown in Figure 7, in which the shutter speed value can be read on the top and side surfaces, and it is housed in a transparent case (not shown). But that's fine.

MO is a motor that rotates the aperture display, which rotates the aperture display 757 and the aperture contact pieces 757a via gear trains 359a and 359b to set the variable resistance RaV.

760 is a shift knob, slide left and right on the drawing,
Switch SW3 on the contact piece lever 761. 762 is a lock button of the shift knob 760, which releases the engagement between the end 363a of the spring member 363 and the recess of the main body by pushing the spring member 363 provided on the back side of the contact piece lever 761;
The shift knob 760 is made slidable, and the power switch SWI' is turned on.

Figure 8 shows the aperture priority AE according to the method of the present invention shown in Figure 7.
This is a circuit connection diagram showing one embodiment of the camera, and the same parts as the circuit shown in the fourth figure are designated by the same reference numerals. In the figure, U is a first tension release circuit and a power supply holding circuit, which use the same configuration as the circuit in FIG. 4. W is a photometry, arithmetic, display, and constant voltage circuit, which excludes the memory circuit ME in the circuit of FIG. 4, and is provided with a shutter second time display meter MT for display purposes. Other photographic information display settings, photometric elements, photometric circuits, etc. are the same as in FIG. 4.

X is an aperture control circuit which receives aperture information vAv from a buffer amplifier A1 having an aperture setting resistor RAVO and a feedback resistor Rfl; and an aperture correction resistor RAVO and a feedback resistor Rf2 from an arithmetic circuit W. operational amplifier A2
The calculated values of the aperture correction information vAvo from , the film sensitivity information set to the resistor R9V, and the bending correction information set to the resistor RAYC are input, and the output is the value of the magnet Mg.
1 to control the aperture mechanism. Y is an extension and seconds control circuit, and shutter seconds information V generated at the output of circuit W.
Extend Tv and use timing circuit to connect magnet Mg3
3 to control the shutter speed. SW4 is a trigger switch of the timing circuit and is turned off when the front curtain starts.

Next, MT is a motor for shifting the shutter speed, and by switching the switch SW3, up (U),
Perform down (D) and stop (S) operations.

SWI' is an auxiliary power switch that operates in conjunction with the switch SW3, and SWl is a power switch that is turned on at the first stroke of the release.

When any of the SWIs is turned on, the transistor E1 of the power supply circuit is turned on. SW2 is a switch that is turned on at the second stroke of the release, and SW5 is a switch that is turned off when winding is completed and turned on when the trailing curtain is running. Mg2 is the first tension release magnet and is driven by the output of the circuit U by causing the charge of the capacitor CI to flow in pulses to Mg2. Mgl is a magnet for aperture control, and Mg3 is a magnet for time control, which are driven by passing the electric charge of capacitor C2 in a pulsed manner.

Next, the operation of the aperture-priority AE camera according to the method of the present invention will be explained with reference to FIGS. 6, 7, and 8.

First, in order to set the desired aperture, use the shift knob lock button 76 provided on the slide knob 760 in FIG.
When 2 is pressed, the end 363a of the spring member 363 is removed from the main body recess, and the sub power switch S W 1' is turned on. Then, the power switch transistor E1c7 in Fig. 8)
The base potential decreases and El becomes conductive. Therefore, the photometry circuit outputs the signal Bvo = By-Avo-Awe from the light receiving elements P and D,
The aperture signal set by the aperture resistor RAV is calculated by the amplifier AI. At the same time, film sensitivity setting resistor Rs
The respective signals are input and calculated by the aperture F value curvature correction setting resistor RAVC. In other words, subject brightness, shutter speed, film sensitivity, aperture,
are respectively By, Tv, Sv, and Av, furthermore, the open F value is Avo, and the number of aperture steps from the open F value is Av-Av.

If ΔAv is the amount of curvature correction according to the aperture F value according to the photometry method, then Avc is the amount of curvature correction according to the open F value. From the relationship of Av + Tv = By + Sv, the shutter time information Tv is: Tv = (By-Avo-Awe) +5v-Av+A
It is expressed as vo+Avc.

However, Bvo = By-Avo-Avc is TTL [
This is the output of the light-receiving element.

The Tv multiplied signal output from the memory circuit is displayed in the finder using the meter MT.

In this way, after turning on the sub power switch SW1', the photographer sees the appropriate seconds displayed in the viewfinder and the aperture value displayed by the aperture display disc 754 in FIG. You can easily select the combination of shutter speed and aperture value. In other words, the aperture value in the viewfinder is
When it is desired to shift to the small aperture side, slide the shift knob 760 in FIG. 3 to the right in the drawing. Then the motor M.O.
is switched to rotate the aperture display 757 to the small aperture side. When it is desired to shift to a lower speed, move the shift knob 780 to the left in the drawing, and the motor MO will rotate the shutter indicator 757 in FIG. 7 to the lower speed.

This operation is not only necessary when you want to shift the aperture, but also when you want to shift the shutter speed value displayed on the meter in the viewfinder.
This can be done with 0. Furthermore, in FIG. 8, the outputs from the arithmetic circuits are sent to comparators CP1. CP2i;
: is input, and when Tv exceeds the control range, CPI works on the under side and LED1 lights up, and on the over side, LED2 works.

As shown in Figure 3, these two LEDs are placed at the bottom of the penta, and when turned on, they illuminate the arrow-shaped mask, and the second
Indicate the sliding direction of the slide knob 360 in the finder as shown in the figure.

Next, when the shutter button 347 is pressed, the first stroke of the switch sw1 grounds the switch sw1, and the power switch transistor El becomes conductive, causing the photometry circuit to operate in the same way as when swi' was pressed, and the meter is properly adjusted. The current time is displayed.

Next, when the shutter button is pressed further, SW2 is grounded on the second stroke, the NAND gate output in Figure 8 becomes o゛, and the flip-flop is set.
The conduction of power switch transistor E1 is latched. At the same time, a pulse radio wave is supplied to Mg2 from the capacitor C'', and the first tension lever 313 in FIG. 7 is released from its attachment and rotates clockwise.

That is, the release lever 314 is rotated counterclockwise by the pin 313b of the first tension lever 313 against the force of the one end 314a of the release lever 314.

As a result, the pin 314b causes the mirror drive engagement lever 3 to
15 rotates, details of which will be described later. Also, release lever 3
14, the locking lever 316 rotates counterclockwise and disengages from the sector gear 318, and the holding lever 350 rotates to the right together with the release lever 314 and separates from the suction lever 330. . Nu, Sector Gear 3
The rotation of 18 moves the signal lever 329 downward via the pin 318d, so the aperture preset ring 303, which has the arm 303c engaged with the signal lever 329, resists the spring 318c by the spring 303a and moves the sector gear. 318 clockwise. For this reason, the speed regulating mechanism 3
Gears 319a and 319b forming the gear 19.

319c rotates, and the last stage stop wheel is rotated counterclockwise. Furthermore, the rotation of the sector gear 318 moves the slider 318b of the variable resistance RΔAV. The output ΔAv of amplifier A3 in FIG. 8 is compared with this resistance value by comparator CP3, and when it reaches a predetermined level, M
The current to gl is cut off, and the iron piece 331 is released.

Therefore, the suction lever 330 is rotated counterclockwise by the spring 331a, and its bent portion is rotated by the stop wheel 319.
c and the rotation of the stop wheel 319c. Therefore, the position of sector gear 318 is determined. Therefore, when the rotation of the sector gear 318 stops as described above, the aperture preset ring 303 is rotated to the position of the set aperture value, thereby determining the position of the bell crank. In other words, the stop position of the aperture preset ring 303 is at the set aperture value. On the other hand, in parallel with the start of such operation, the automatic throttle mechanism also starts.

That is, the first tension lever 313 is rotated clockwise by the spring 313C, and the release lever 314 is rotated counterclockwise, so that the end 315a of the mirror drive engagement lever 315 is rotated via the pin 314b. Rotate clockwise. That is, the one end 315b of the mirror drive engagement lever 315 is disengaged from the one side 311c of the mirror drive /< -311, and the mirror drive lever 311 is rotated counterclockwise by the spring 311d. At the same time, mirror drive lever 3
Since the claw portion 311b of No. 11 and the tension lever 336 are in a locked state, the push-up lever 0 337 that pivotally supports the tension lever 336 rotates counterclockwise. Therefore, the automatic aperture lever 30 is
The automatic aperture lever 305 engages with the rising portion 305c of 5.
Rotate clockwise. This operates a pin 304 installed in the aperture drive ring to narrow down the aperture according to the preset position of the bell crank.

By counterclockwise rotation of the push lever 337, the flip-up pin 338a of the mirror 338 is pushed up, and the mirror 338 is flipped up.

Along with this flipping motion of the mirror 338, a delay device (not shown) operates, and after the delay time of the delay device, the front curtain tensioning lever 333 is rotated clockwise by the mirror drive lever 311. The delay time provided by this delay device is for starting the shutter after the time has elapsed from the maximum aperture to the minimum aperture.

For this reason, the leading gear 334 begins to rotate, and the leading pinion 33
The leading curtain runs through 5. 1 of the first curtain The count start switch SW4 is turned off by a known method due to running, and after a time determined by the set aperture, brightness of the subject, and film sensitivity, the control circuit Y is activated and a pulse is applied to the excitation coil Mg3. . For this reason, the magnetic force of the permanent magnet and the magnetic force of Mg3 (magnet) cancel each other out, and the attractive force is lost. Therefore, the lock on the trailing gear 339 by the suction lever 340 is released, so the trailing gear 339 starts rotating and causes the trailing curtain to travel via the trailing pinion 339'. Nu,
339 due to the rotation of the trailing curtain gear 339 when the trailing curtain ends.
The rear curtain signal lever 341 is rotated counterclockwise by the pin a, and the mirror tension lever 336 is rotated clockwise. This rotation of the mirror tension lever 336 releases the engagement with the mirror drive lever 311.

Therefore, the push-up lever 337 is rotated clockwise by the spring 305a via the automatic aperture lever 305, and the mirror 3
38 is returned to its original position by a return spring 338c. At the same time, the automatic aperture lever 305 is rotated counterclockwise by the spring 305a, and the planted pin 304 of the aperture drive ring returns to its original open state. and winding shaft 3
When the winding operation is performed by 08, film winding and shutter charging are performed, and the intermediate lever 310
and 307, the charge lever 312 is charged, and the automatic diaphragm mechanism and the mirror mechanism are charged by the release operation, and the disengaged portion is reactivated and returned to the state shown in the figure.

In the embodiments of the present invention shown in Figs. 6, 7, and 8, the aperture shift function is driven by an electric motor, but it is also possible to use a mechanical drive instead of this motor drive. Another embodiment of the present invention is shown in FIG. FIG. 9 is a main part mechanical diagram showing another embodiment of the shift mechanism in the exposure condition determination method of the present invention, and its configuration is different from that in FIG. 5.
Similarly, the shutter dial 509b in □ in Fig. 5
The aperture scale dial 909b has been replaced in place of the aperture scale dial 909b, and the other configurations are the same.The numerals "5" and "9" in FIG. 5 have been replaced with "r901".
It is displayed as follows. Note that 911 is an aperture information input resistor. Therefore, since the apparatus shown in FIG. 9 has substantially the same structure and operation as those shown in FIG. 5, the explanation thereof will be omitted.

As described above, in the exposure condition determining device of the present invention, instead of setting the shutter speed or aperture preset using the shutter speed dial and aperture ring, which were provided on conventional cameras and lenses, the desired value of the priority setting information is set using the shift mechanism. EV4 is used to shift the shutter speed and aperture value located inside the viewfinder.
@AE right camera 2y because you can set the desired exposure conditions while watching the display! ! ! It can be an extremely convenient device when applied to either shutter-priority or aperture-priority cameras.

Furthermore, since the present invention displays the setting information only while the shift mechanism is being operated, that is, only when necessary, the power saving effect is extremely high for devices such as cameras that only have a small power source. .

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the camera body using the exposure condition determining device of the present invention, and FIG. 2 is an embodiment of the firing-white display of a shutter priority AE camera using the method of the present invention. Fig. 3 is a configuration diagram showing the main internal mechanism of the shutter priority AE camera according to the method of the present invention, and Fig. 4 is a circuit connection diagram showing an embodiment of the shutter priority AE camera shown in Figs. 2 and 3. , FIG. 5 is a mechanical diagram of a main part showing another embodiment of the shift mechanism in the exposure condition determination method of the present invention, and FIGS. 6 to 9 are diagrams of an aperture-priority AE camera using the exposure condition determination method of the present invention. FIG. 6 is a diagram showing the display in the viewfinder, FIG. 7 is a configuration diagram showing the main parts of the internal mechanism of the camera, FIG. 8 is a circuit connection diagram, and FIG. 9 is a diagram showing another embodiment of the shift mechanism. FIG. 101...Shatter time or aperture value display, 102...
...Shift knob, 102'...Lock button, 201...Shutter time display window, 205.206...Shutter time control outside limit display, U
...first tension release and power supply holding circuit, W...photometering,
Arithmetic, memory 9 Display and constant voltage circuit, Y... Extension and seconds control circuit, Z... Shishata seconds display motor drive circuit, 604.
...Aperture display window, 605.606...Aperture value control outside limit display, X...
Aperture control circuit.

Claims (1)

[Claims] A camera characterized in that it is provided with a display means for displaying photographing information set in the camera, an operating means for switching the photographing information, and an interlocking means for activating the display means while the operating means is being operated.