GB2241590A - Indicating device within finder of camera - Google Patents

Abstract

A camera having an exposure compensating device and a finder, including an indicating member (30) within the finder, having a pair of indication marks (37a, 37b), and an indication controller for indicating the indication marks (37a, 37b) in different modes, in accordance with the compensated exposure value when the exposure is compensated by the exposure compensating device. <IMAGE>

Description

INDICATING DEVICE WITHIN FINDER OF CAMERA The present invention relates to

an indicating device within a finder of a camera for indicating whether or not an exposure value set for example by a photographer is proper or improper with respect to an optimum exposure value.

It is known to indicate in a field of view of a finder of a camera whether or not a manually set exposure value is proper or improper with respect to an optimum exposure value which is calculated in accordance with an object luminance and a film sensitivity, etc.

There are various known indication systems, in which:indication lamps are located side by side to individually indicate:-a manually set shutter speed and a calculated shutter speed; a deviation (number of steps represented by EV value) between the manually set exposure value and the calculated exposure value which are indicated as a digital number by indicating segments; when a set exposure value is improper, the setting of a proper exposure value is requested using a bar chart; and, two opposed upper and lower arrow symbols selectively flicker depending on the proper or improper exposure value.

However, the above mentioned systems need a relatively large space for indication and a complicated indication circuit, thus not resulting in realization of a compact and simple camera.

Furthermore, in the system mentioned above, it is possible to judge whether the set exposure value is proper or improper, but impossible to directly know the number of steps of deviation from the optimum exposure value.

Furthermore, upon taking a picture, the photographer may intentionally deviate f rom a standard proper exposure value calculated by an automatic exposure device at an automatic exposure mode toward over-exposure or under-exposure.

For instance, upon compensating the exposure factor (compensation of exposure value), the exposure value is varied step by step from the standard optimum exposure value toward over-exposure or under-exposure.

However, the necessary number of steps can not be indicated by the conventional indicating device within the finder. Namely, the photographer can not learn how many steps (1 step is 1 exposure value (1EV or lEv)) are needed to reach a desired over-exposure or under- exposure or the magnitude of a present deviation from a desired value.

An object of the present invention is to eliminate the above-mentioned drawbacks by providing an indicating device within a f inder of a camera, which needs a relatively small space and which can indicate whether or not the set exposure value is proper, and by how many steps the improper exposure value is deviated from the optimum value, etc., even upon setting an exposure factor.

According to the present invention, there is provided a camera having an exposure compensating means and a f inder, comprising indicating means within the finder having a pair of indication marks; and,indication control means for indicating the indication marks in different modes in accordance with the compensated exposure value when the exposure is compensated by the exposure compensating means.

With this arrangement, the photographer can easily know whether the exposure compensation is made, while observing the object through the finder.

Preferably, the indication control means indicates one of the indication marks in a first mode when the exposure compensation is effected within a positive or -3negative predetermined range by the exposure compensating means, and indicates one of the indication marks in a second mode when the exposure compensation Is effected beyond the positive or negative predetermined range by the exposure compensating means, respectively.

With this arrangement, the photographer can easily judge whether the exposure compensating is made within or over a predetermined range, while observing the object through the finder.

In a preferred embodiment of the present invention, a photometering means is provided for metering the luminance of an object to be taken to calculate an appropriate exposure value, and a manual exposure parameter selecting means for selecting a pair of exposure parameters (a shutter speed and a diaphragm value). If the exposure parameters are selected by the manual exposure parameter selecting means, the indication control means indicates both the indication marks when the exposure value determined in accordance with the selected exposure parameters is substantially identical to the calculated appropriate exposure value, and wherein said indication control means indicates only one of the indication marks in a first mode, when a difference between the exposure value determined in accordance with the selected exposure components and the calculated appropriate exposure value is within a predetermined range and indicates only one of the indication marks in a second mode, when a difference between the exposure value determined in accordance with the selected exposure components and the calculated appropriate exposure value is out of the predetermined range, respectively.

With this construction, the photographer can visually confirm the exposure value in the manual exposure mode.

Preferably, the indication marks are made of a pair of identical semicircular marks close to each other. The semi-circular marks substantially define a circle when combined.

Both the upper and lower semi-circular marks are lit when the exposure value is substantially identical to the optimum exposure value, and only one of the semi-circular marks is lit or flickered when the exposure value is deviated from the optimum exposure value.

Consequently, the photographer can more easily learn the exposure value.

In the preferred embodiment, if the exposure compensation is made, said indication control means lights the upper semicircular mark or the lower semi-circular mark when the compensation of the exposure value is made within a predetermined positive range or within a predetermined negative range, respectively.

Preferably, the indication control means flickers the upper semi-circular mark or the lower semi-circular mark when the exposure compensation is outside of the predetermined positive range or when the exposure compensation is outside of the predetermined negative range, respectively.

With this feature, the photographer can learn at a glance whether the exposure value is optimum, how much compensation of the exposure value is made, the deviation of the exposure value determined in accordance with the manually set exposure parameters from the optimum exposure value, etc. , without moving his or her eye from the finder.

The present disclosure relates to subject matter contained in Japanese patent application No. 02-51240 (filed on March 2, 1990) which is expressly incorporated herein by reference in its entirety.

A preferred embodiment of the invention will be described below in detail, by way of example only, with reference to the accompanying drawings, in which; Figure 1 is a block diagram of a control system of an indicating device within a finder of a camera, embodying -5the present invention; Fig. 2 is a schematic view of a field of view of a finder shown in Fig. 1;

Figs. 3A, 3B, 3C, 3D, and 3E are schematic views showing different indications of an indicating device within a finder embodying the present invention; and, Figs. 4 and 5 are flow charts of operations of an indicating device within a finder embodying the present invention.

Figure 1 shows a block diagram of a control unit of an indicating device within a finder of an automatic exposure single lens reflex camera, in an embodiment of the present invention.

The indicating device within the finder includes a light receiver 10 for detecting the brightness (luminance) of an object to be taken, a shutter speed/diaphragm value selecting portion 12 for manually selecting the exposure parameter including the shutter speed and the diaphragm value, a film sensitivity/exposure factor selecting portion 14 for selecting the sensitivity of the loaded film and the exposure compensation value (exposure factor), and an exposure mode selecting portion 16 for selecting a manual exposure mode and an automatic (programmed) exposure mode. The outputs of these components 10, 12, 14 and 16 are input to a controller 20.

The exposure (exposure parameters) compensation includes for example an adjustment (increase and decrease) of the proper exposure value depending on the brightness of the object toward the plus side (over-exposure) or minus side (under-exposure) by a predetermined APEX value, and an adjustment of the film sensitivity toward over-expc>sure or under-exposure by a predetermined value to set a desired over-exposure or under-exposure through a predetermined APEX value higher or lower than the calculated proper -6 exposure value. In the illustrated embodiment, the adjustment can be effected through a unit of 1/2 EV (or 1/3 EV). In the manual exposure mode, a photographer manually sets both the shutter speed and the diaphragm value. In the automatic exposure mode, the shutter speed and the diaphragm value are automatically determined in accordance with a predetermined algorithm, based on the detected object luminance signal, the detected film sensitivity signal, and the detected exposure parameter to obtain an optimum exposure value.

The controller 20 calculates the optimum exposure value in accordance with the object luminance signal output from the light receiver 10 and the film sensitivity signal output from the film sensitivity/exposure factor selecting portion 14. When the automatic exposure mode is selected by the exposure mode selecting portion 16, the controller 20 also calculates an optimum shutter speed and an optimum diaphragm value at the calculated exposure value, in accordance with the calculated exposure value, a predetermined algorithm of the selected automatic exposure mode, and the exposure factor set by the film sensitivity/ exposure factor selecting portion 14. The controller 20 causes an exposure controller 22 to drive the shutter and the diaphragm (both not shown) in accordance with the manually set shutter speed and diaphragm value or the calculated shutter speed and diaphragm value to thereby effect the exposure.

In the controller 20 controls the accordance with the manually diaphragm value output from value selecting portion 12 to other hand, in the programmed 20 calculates manual exposure mode, the exposure controller 22 in set shutter speed and the the shutter speed/diaphragm effect the exposure. On the exposure mode, the controller the optimum exposure value, based on the object luminance signal from the light receiver 10, the film sensitivity signal and the exposure factor signal from -7the film sensitivity/exposure factor selecting portion 14 to control the exposure controller 22 in accordance with the calculation result to thereby effect the exposure at the shutter speed and the diaphragm value thus obtained.

A switch portion 21 includes a photometering switch which is actuated to commence the photometering and the calculation of the exposure value, etc., and a release switch which is actuated to drive the shutter and the diaphragm to effect the exposure.

The controller 20 also has a means for comparing the calculated proper exposure value and the exposure value obtained in accordance with the manually set shutter speed and the manually set diaphragm value in the shutter speed/diaphragm value selecting portion 12, when the manual exposure mode is selected.

The controller 20 outputs a light control signal to a light controller 24 in accordance with the comparison result. The light controller 24 actuates a lighting circuit 25 or a flickering circuit 26 in accordance with the light control signal to actuate an indicating member 30 through a driver 27.

For instance, when the exposure value based on the exposure parameter (shutter speed and diaphragm value) selected by the shutter speed/diaphragm value selecting portion 12 is substantially identical to the calculated optimum exposure value, the controller 20 outputs the result to the light controller 24, so that the indicating member 30 within the finder indicates that the selected exposure value is optimum through the light controller 24, the lighting circuit 25, and the driver 27.

If the selected exposure value is not identical to the calculated optimum exposure value, but the difference therebetween is within a first limit, for example, IEV, the controller 20 causes the indicating member 30 to indicate that the selected exposure value is over or under the optimum exposure value by less than 1EV through the -a- light controller 24, the lighting circuit 25, and the driver 27.

When the selected exposure value is out of the first limit, for example over or under the optimum exposure value by more than 1EV, the controller 20 outputs the result to the light controller 24 to cause the indicating member 30 to indicate that the selected exposure value is over or under the optimum exposure value by more than lEV through the flickering circuit 26 and the driver 27.

The light receiver 10, the shutter speed/diaphragm value selecting portion 12, the film sensitivity/exposure factor selecting portion 14, the exposure mode selecting portion 16 and the controller 20 constitute an exposure state detecting means. The light controller 24, the lighting circuit 25, the flickering circuit 26, the driver 27 and the indicating member 30 constitute an indicating device.

The indicating member 30 within the finder as constructed above is provided on the right side of a finder image plane 40, so that the photographer can observe both the indicating member 30 and the finder image plane 40 at one time, as shown in Fig. 2. The indicating member 30 is provided with an external strobe mark (sign) 31, a built-in strobe mark 32, a focusing mark 33, an exposure mode indicating portion 34, a shutter speed indicating portion 35, a diaphragm value indicating portion 36, an exposure state indicating portion 37, an exposure factor indicating portion 38, and a luminance indicating portion 39. The indication marks 31, 32 and 33 are made of LED's, and the indicating portions 34, 35, 36, 37, 38 and 39 are made of LCD's. The location of the indicating member 30 within the finder is not limited to the right side of the finder image plane 40. Namely, the indicating member 30 can be located at any place around the finder image plane 40, for example on the upper or lower side of the finder image plane 40. The exposure state indicating portion 37 is preferably disposed in the vicinity of the shutter speed -gindicating portion 35 and the diaphragm value portion 36.

Figures 3A through 3E show different indication states of the indicating device within the finder of a camera in the present embodiment. In Figs. 3A through 3E, the optimum exposure value is obtained when the shutter speed is 1/125 second, and the diaphragm value is F5. 6.

indicating When the manual exposure mode is selected by the exposure mode selecting portion 16, a mark (symbol) "M" is indicated in the exposure mode indicating portion 34 to indicate that the manual exposure mode is selected. Also in this state, when the shutter speed and the diaphragm value are selected to be 1/125 second and F5.6 respectively by the shutter speed/diaphragm value selecting portion 12, symbols 1112511 and 115.611 are indicated in the shutter speed indicating portion 35 and the diaphragm value indicating portion 36 to indicate that the set shutter speed is 1/125 second and the set diaphragm value is F5.6. respectively (Fig. 3A).

Since the exposure value determined in accordance with the shutter speed and the diaphragm value set by the shutter speed/diaphragm value selecting portion 12 is approximately identical to the optimum exposure value which is calculated in the controller 20, the indication of the exposure state indicating portion 37 is as shown in Fig. 3A. Namely, a pair of upper and lower semi-circular symbols 37a and 37b opposed to each other are lit (Fig. 3A). Consequently, the photographer can judge that exposure value is optimum when the mark or sign indicated in the exposure state indicating portion 37 is circular. The judgement can be conveniently effected while looking at the object to be taken.

When the shutter speed and the diaphragm value set by the shutter speed/diaphragm value selecting portion 12 are 1/125 second and F4.0, respectively, the indication of the -10 exposure state indicating portion 37 is as shown in Fig. 3B in which an over-exposure of M is indicated. Namely, only the upper semi-circular symbol 37a is lit (first indication mode).

When the shutter speed and the diaphragm value set by the shutter speed/diaphragm value selecting portion 12 are 1/125 second and F11, respectively, the indication of the exposure state indicating portion 37 is as shown in Fig. 3C in which an under-exposure of 2EV is indicated. Namely, only the lower semi-circular symbol 37b is flickered (second indication mode).

When the programmed exposure mode is selected by the exposure mode selecting portion 16, the exposure factor is set to be + 1EV by the film sensitivity/exposure factor selecting portion 16, and the shutter speed and the diaphragm value set by the shutter speed/diaphragm value selecting portion 12 are 1/125 second and F4.0, respectively, the indication of the exposure state indicating portion 37 is as shown in Fig. 3D in which the symbols "P", "1250 and "4.0" are indicated in the exposure mode indicating portion 34, the shutter speed indicating portion 35, and the diaphragm value indicating portion 36 to indicate that the programmed exposure mode is selected, the calculated shutter speed is 1/125 second, and the calculated diaphragm value is F4.0, respectively.

Furthermore, the exposure factor indicating portion 38 indicates that the exposure factor is set. In this state, only the upper semi-circular symbol 37a is lit to indicate that the exposure factor is + 1EV.

When the exposure factor is set to be -2EV by the film sensitivity/exposure factor selecting portion 16, the indication of the exposure state indicating portion 37 is as shown in Fig. 3E in which the lower semi-circular symbol 37b is flickered.

The indications as mentioned above are controlled as follows (Figs. 4 and 5).

1 The control is performed by the controller 20 in accordance with the program stored in the controller 20.

The controller 20 reads the shutter speed and the diaphragm value (TV and AV respectively) determined by the shutter speed/ diaphragm value selecting portion 12 when the photometering switch (SW) of the switch portion 21 is made ON (steps Sl and S3). If no setting of the shutter speed and the diaphragm value is effected, the no setting signal is input; and a setting signal is input when such setting is effected.

Thereafter, the controller 20 judges whether the exposure mode selected by the exposure mode selecting portion 16 is the manual exposure mode or the programed exposure mode (automatic exposure mode) at step S5. I f the mode is the manual exposure mode, the controller 20 calculates the optimum exposure value in accordance with the signals from the light receiver 10 and the film sensitivity/exposure factor selecting portion 14.

Thereafter, the set exposure value is calculated in accordance with the shutter speed and the diaphragm value selected by the shutter speed/diaphragm value selecting portion 12 which was input to the controller 20 at step S3, so that the mark I'M" is indicated in the exposure mode indicating portion 34 to indicate that the manual exposure mode is selected, the selected shutter speed is indicated in the shutter speed indicating portion 35, and the selected diaphragm value is indicated in the diaphragm indicating portion 36, (steps S7 and S9).

After that, the controller 20 judges whether the selected exposure value read at step S3 is approximately equal to the optimum exposure value calculated at step S7 (step Sll). If the selected exposure value is approximately equal to the calculated optimum exposure value, the light value respectively, as shown in Fig. 3 controller 24 indicates the exposure state indicating portion 37 of the indicating member 30 within the finder through the lighting circuit 25 and the driver 27, as shown in Fig. 3A. Thereafter, the control proceeds to step S15. Namely, a pair of semi-circular symbols 37a and 37b are both lit. Conversely, if the selected exposure value is not approximately equal to the calculated optimum exposure value at step Sll, the sub-routine to indicate a composite mark which will be described hereinafter is performed (step S13) and then, the control proceeds to step S17.

At step S17, whether the release switch of the switch portion 21 is made ON is checked. If no release switch is made ON, the control is returned to step Sl. If the release switch is made ON, the release operation is performed at the selected exposure value (shutter speed and diaphragm value).

If the programed exposure mode is selected by the exposure mode selecting portion 16 at step S5, whether theexposure factor is set by the film sensitivity/exposure factor selecting portion 14 is checked at step S21. If no exposure factor is set, the controller 20 calculates the optimum exposure value in accordance with data fed by the light receiver 10 and the film sensitivity/exposure factor selecting portion 14 (step S27).

Af ter that, the symbol "P" which represents that the programed exposure mode is selected is lit in the exposure mode indicating portion 34, as can be seen in Figs. 3D and 3E. The calculated shutter speed and the calculated diaphragm value are indicated in the shutter speed indicating portion 35 and the diaphragm value indicating portion 36, respectively (step S29). Thereafter, the control proceeds to step S17.

on the other hand, if the exposure factor is found to be set at step S21, this is indicated in the exposure factor indicating portion 38, and then, the sub-routine for the indication of the composite mark is performed (steps S23 and S25). After that, the control is returned to step S27.

At step S17, whether or not the release switch is made ON is checked. If no release switch is made ON, the -13control is returned to step Sl. Conversely, if the release switch is made ON, the exposure is effected at the calculated exposure value (shutter speed and diaphragm value).

Figure 5 shows a sub-routine (steps S13 and S25) for the indication of the composite mark. If the controller 20 judges that the exposure value is improper at step Sll, or judges that the exposure factor is set at step S21, the controller 20 checks whether the selected exposure value is deviated from the normal optimum exposure value within or beyond the first range ( 1EV) at step S31.

If the deviation (correction) is within the first range, the controller 20 checks whether the deviation is plus (over) or minus (under) at step S33. If the deviation is plus, the upper semi-circular symbol 37a is lit (step S35), as shown in Fig. 3B. Conversely, if the deviation is minus, the lower semi-circular symbol 37b is lit at step S37.

If the deviation is larger than the first range 1EV), the controller 20 checks whether the deviation is plus (over) or minus (under) at step S39. If the deviation is plus, the upper semi- circular symbol 37a is flickered (step S41). Conversely, if the deviation is minus, the lower semi-circular symbol 37b is flickered at step S43, as shown in Fig. 3E.

As can be understood from the above discussion, when the programed exposure mode is selected, and if the exposure correction is set, the exposure correction symbol 38 is lit and the semi-circular symbol 37a or 37b is lit or flickered, so that the photographer can visually confirm the exposure factor while observing the finder.

On the other hand, in the manual exposure mode, when the selected exposure value is approximately identical to the normal optimum exposure value, the upper and lower semi-circular symbols 37a and 37b are lit. If the deviation is smaller than +1EV (over exposure), only the -14 upper semi-circular mark 37a is lit and if deviation is smaller than -1EV (under exposure), only lower semi-circular mark 37b is lit. Furthermore, the deviation is larger than +M (over exposure), only upper semi-circular mark 37a is flickered, and if deviation is larger than -M (under exposure), only the lower semi- circular mark 37a is flickered. Consequently, the photographer can directly know the number of steps of deviation, represented by EV values, from the optimum exposure value, while observing the finder.

Although the difference between an actual exposure value and the optimum exposure value at a normal photographing is represented by unit of one EV in the illustrated embodiment, the unit of difference (deviation) is not limited to one EV.

A predetermined plus (positive) and minus (negative) range referred to in the present application means -1EV S (the first range);: +1EV, so that the exposure range in which the exposure is out of the predetermined positive and negative range on the over-exposure side is represented by( > +1EV), and the exposure range in which the exposure is out of the predetermined positive and negative range on the under-exposure side is represented by(< -1EV), respectively.

When the exposure difference (deviation) i represented by 0.5 EV unit, by +0. 5EV < the the if the the S the f irst range is represented (the first range)< +1.5EV on the plus side and by -0.5EV > (the first range) > -1.SEV on the minus side, respectively.

However, the above mentioned first range is given by way of example, and can be optionally modified.

More than two exposure ranges can be discriminated by changing the flickering speed of the semi-circular marks 37a and 37b. - The exposure state indicating portion 37 can be made of light emitting diodes (LED1s). The shape of the exposure state indicating portion 37 (37a and 37b) is not limited to t Q -15a circle (two semi-circles), and can be for triangle. The position of the exposure state portion 37 is not limited to that of the embodiment. The indication of the exposure state indicating portion 37 can be realized also by LCD segments which are partly visualized and partly made transparent or by selectively lightening the back light, etc.

example a indicating illustrated In a camera in which only one of the shutt:er speed and the diaphragm value can be manually set, if the exposure can be corrected, the photographer can easily and visually confirm the exposure state while observing the finder by controlling the exposure state indicating portion 37 (semi-circular marks 37a and 37b) in accordance with the corrected exposure value, similarly to the case of the programed exposure mode.

As can be seen from the foregoing, in the illustrated embodiments, the state of the exposure (proper exposure or improper exposure), the number of steps of deviation from the optimum exposure, the shutter speed and the diaphragm value, etc. can be indicated in a small space of the finder, thus resulting in a realization of a compact and multi-information indicating camera.

Claims (19)

CLAIMS;

1. A camera having an exposure compensating means and a finder, comprising:

indicating means within the f inder having a pair of indication marks; and, indication control means for indicating the indication marks in different modes in accordance with the compensated exposure value when the exposure is compensated by the exposure compensating means.

2. A camera according to claim 1, wherein said exposure compensating means varies the exposure value through a plurality of positive or negative compensation values.

3. A camera according to claim 1 or 2, wherein said indication control means indicates one of the indication marks in a first mode when the exposure compensation is effected within a positive or negative predetermined range by the exposure compensating means, and indicates one of the indication marks in a second mode when the exposure compensation is effected beyond the positive or negative predetermined range by the exposure compensating means, respectively.

4. A camera according to any preceding claim, further comprising a photometering means for metering the luminance of an object to be taken to calculate an appropriate exposure value, and a manual exposure factor selecting means for selecting a pair of exposure factors.

5. A camera according to any of claims 1 to 3, further comprising a photometering means for metering the luminance of an object to be taken to calculate an appropriate exposure value, an exposure factor selecting means for selecting a pair of exposure factors, an exposure mode selecting means for selecting an automatic exposure mode in which the exposure factors are automatically set up in accordance with the 1 alculated appropriate exposure value and a manual exposure mode in which the exposure factors are manually selected by the exposure factor selecting means.

6. A camera according to claim 4 or 5, wherein said exposure compensating means compensates the appropriate exposure value calculated by the photometering means.

7. A camera according to any of claims 4 to 6, wherein if the exposure factors are selected by a manual exposure factor selecting means, said indication control means indicates both the indication marks when the exposure value determined in accordance with the selected exposure factors is substantially identical to the calculated appropriate exposure value, and indicates only one of the indication marks in a f irst mode, when a difference between the exposure value determined in accordance with the selected exposure factors and the calculated appropriate exposure value is within a predetermined range and indicates only one of the indication marks in a second mode, when a difference between the exposure value determined in accordance with the selected exposure factors and the calculated appropriate exposure value is out of the predetermined range, respectively.

8. A camera according to claim 7, wherein in the manual exposure mode, said indication control means lights both the indication marks when the exposure value determined in accordance with the exposure factors selected by the manual exposure factor selecting means is substantially identical to the appropriate exposure value, and wherein said indication control means lights and flickers the upper indication mark when a difference between the exposure value determined in accordance with the selected exposure f actors and the appropriate exposure value is within the predetermined positive range and larger than the predetermined positive range, respectively.

9. A camera according to claim 7 or 8, wherein said indication control means lights and flickers the lower indication mark when a difference between the exposure value deterRiined in accordance with the selected exposure factors and the appropriate exposure value is within the predetermined negative range and outside of the predetermined negative range, respectively.

10. A camera according to claim 8 or 9, wherein in the manual exposure mode, said indicating means flickers the lower or upper indication mark at different speeds according to the degree of difference between the exposure value determined in accordance with the selected exposure factors and the appropriate exposure value.

11. A camera according to any preceding claim, wherein said indicating means further comprises a compensation mark f or indicating that the exposure compensation is made by the exposure compensating means.

12. A camera according to claim 11 as dependent upon claim 5, wherein in the automatic exposure mode, said indication control means indicates the compensation mark when the compensation of the exposure value is made by the exposure compensating means within a predetermined range.

13. A camera according to any preceding claim, wherein said indication marks are made of a pair of identical indication elements close to each other.

14. A camera according to claim 13, wherein said identical indication elements are symmetrically opposed to each other.

15. A camera according to claim 14, wherein said indication marks are made of a pair of semi-circular lighting elements which substantially define a circle when combined.

16. A camera according to claim 15, wherein said semicircular elements are located one on another in a field of view of the finder.

17. A camera according to claim 16, wherein if the exposure compensation is made, said indication control means lights the upper semi-circular element and the lower semicircular element when the compensation of the exposure value is nade within a predetermined positive range and within a predetermined negative range, respectively.

18. A camera according to claim 17, wherein said indication control means flickers the upper semi-circular element and the lower semi-circular element when the exposure compensation is over a predetermined positive range and when the exposure compensation is over a predetermined negative range, respectively.

19. A camera having an exposure compensating means and a finder, substantially as hereinbefore described with reference to the accompanying drawings.

1'1lbJ,hed I q541 at The Patent Office, Concept House. Cardiff Road Newport. Gwent NP9 I RH. Further copies Ma%. be obtained fforn Sale!, Bran(h. L nix 6. Nine Mile Point. C%x-nifelinfach. Cross Keys. Newpori. NPI 7HZ. Printed by Multiplex techniques lid. St Mary Cray. Kent