JPH04208B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device in an exposure meter for photographing.

Problems with the Prior Art Conventionally, a stand-alone exposure meter or an exposure meter built into a camera, or an exposure meter built into a camera, measures a measured value according to the brightness of the subject when measuring the subject light, and the part of the subject corresponding to the measured value is placed in the middle on the film. It was only displayed as information to be reproduced to a target or average concentration.

Generally, there is the following relationship between a photographic film that records the intensity of light and the luminance distribution of the subject to be recorded. That is, the difference or ratio between the intensity of light that can be recorded by a photographic film is specified depending on the type of each photographic film, and this is sometimes called the latitude of the photographic film. With respect to this latitude, for some objects, the brightness ratio between the maximum brightness and the minimum brightness of that object is smaller than the latitude. On the other hand, for other subjects, the brightness ratio may exceed the latitude. For a subject whose brightness ratio does not exceed the latitude, if the camera control exposure value is set based on the average value of the maximum brightness and minimum brightness, all the brightness information of the subject will be recorded on the film. In the case of such exposure, information that the photographer considers unnecessary for expressing the intention of the image can be removed at various processing stages after the exposure is completed. However, if the luminance ratio of the subject exceeds the latitude, it is impossible to record all the subject's luminance information on the film no matter how the exposure is set. Therefore, exposure settings become a matter of choice. Of course, for ordinary photographers, this kind of exposure setting problem is troublesome, and one way to solve this problem is to set the average of the shooting screen even when the brightness ratio exceeds the latitude of the film. A photometry system is provided that determines exposure by measuring brightness. However, with such a photometry system, it is difficult for the photographer to find an appropriate exposure value to obtain the desired image. In order to obtain a film with an exposure suitable for expressing the intention of the image, it is necessary to select and set the exposure value, that is, the combination of exposure time and aperture value. For a subject whose brightness ratio exceeds the latitude, information on the high brightness side may be determined to be necessary even if information on the low brightness side is sacrificed, or vice versa. Furthermore, there may be cases where it is determined that information on the inner side is necessary at the expense of information on both the high-luminance side and the low-luminance side. Furthermore, even for a subject whose luminance ratio does not exceed the latitude, it cannot be said that exposure that fully reflects the photographer's drawing intention can be achieved simply by using the average value as the exposure control value. That is, in order to perform exposure in accordance with the photographer's drawing intention, it is necessary to quantitatively know at what density a desired portion of the subject will be reproduced on the film.

Purpose of the Invention The present invention has been made in view of the above-mentioned problems, and provides a useful exposure meter for finding an exposure value suitable for expressing the photographer's intention in creating the image. The purpose is to make it possible to quantitatively find an exposure value suitable for expressing an intention without relying on empirical intuition.

Structure and operation of the invention Specifically, the present invention enables a photographer to quantitatively and easily visually confirm the density at which a desired part of a subject is reproduced on a film. The purpose of the present invention is to provide an exposure meter useful for finding exposure control values according to the drawing intention.

That is, the present invention comprises a photometric circuit 1 that measures the light intensity of a part of a subject, and a large number of display sections arranged in a row, and the display section corresponding to the photometric value output from the photometric circuit is displayed in a display state. a first display means 30 for displaying an image; a second display means 32 disposed in parallel with the first display means for displaying an index related to the reproduced density on the film; and a means 24 for outputting an exposure control value; moving means 26 to 29 for relatively moving the indicator of the second display means and the display section that is brought into a display state in accordance with the photometric value of the first display means in accordance with the output of the exposure control value output means; This is a newly created exposure display device characterized by having the following features.

Therefore, the exposure display device according to the present invention has the following features:
The photometric value display by the first display means and the reproduced density related index by the second display means are provided in parallel, and both displays are moved relative to each other according to the exposure control value, so that the photometric value and the index can be displayed in parallel. From both displays,
The density at which a desired part of the object is reproduced can be quantitatively determined and easily visually recognized. Furthermore, from the relative positional relationship between the two displays, an exposure control value more appropriate for expressing the photographer's drawing intention can be quantitatively and easily determined.

Embodiments The present invention will be described in detail below with reference to embodiments shown in the drawings.

First, the structure of the exposure meter will be explained with reference to the block diagram shown in FIG. In Figure 1, block 1
2 is a photometry circuit, which has a plurality of light receiving elements P ₁ to _{P 25} made of photodiodes (photocells) in a certain area corresponding to the photographic screen, that is, the focal plane of the camera's film, as shown in FIG. They are arranged in series to obtain a series of photoelectric conversion outputs corresponding to the intensity of light incident on each of the light receiving elements. A specific circuit example of this photometric circuit 1 is shown in FIG. 3, and the details will be described later.
A voltage signal proportional to the logarithm of the intensity of light incident on P ₁ to _{P 25} is output in time series.

Block 2 is an information calculation circuit that calculates an exposure time signal by photographically calculating a voltage signal obtained by sequentially converting, for example, the film sensitivity and the aperture value of the photographing lens into one electric signal on the voltage signal of the photometry circuit 1. If the exposure time is determined in advance and the aperture is to be produced in accordance with the exposure time, a voltage signal corresponding to the exposure time is applied to the information calculation circuit instead of the aperture value signal. A specific circuit example of the information calculation circuit 2 is shown in broken line block 1 in FIG.
2, the details of which will be described later.

Blocks 3 and 4 are the maximum value Emax and the minimum value Emin among a series of exposure time signals corresponding to the light intensity incident on each light receiving element _P1 to _P25 , which are output in time series from the information calculation circuit 2. This is a circuit that detects both. A specific circuit example of the maximum value and minimum value detection circuit is shown in FIG. 4, and as described later, the maximum value and minimum value detected in these circuits 3 and 4 are digitized and sent to the next stage decoder circuit. 6 and 7.

Block 5 includes maximum and minimum value detection circuit 3,
4 respectively detected signal Emax,
This is an intermediate value calculation circuit that outputs any value between Emin. The output Emid of the circuit 5 is expressed by equation (1).

Emid=(Emax−Emin)k+Emin (1) In equation (1), k is arbitrarily determined by the photographer within the range of 0≦k≦1. For example, k=0,
The intermediate value calculation circuit 5 is configured so that any one of the five numerical values 0.25, 0.5, 0.75, and 1 can be freely selected.

Now, if k=0 is chosen, the output is Emid=Emin, When k=0.5 Emid=(Emax−Emin)/2, When k=1 Emid=Emax.

To be more specific, if Emax and Emin represent exposure times of 1/250 seconds and 1/15 seconds, then if k = 0.5, the intermediate value calculation circuit 5 corresponds to 1/60 seconds. A signal is output. This output signal can be input to an exposure time control circuit P provided in the camera to automatically control the exposure time. Blocks 6, 7, and 8 are decoders that convert the binary codes in the respective pre-stage circuits 3, 4, and 5 into signals suitable for display. The outputs of decoders 6 and 7 are ORed via switches SW ₁ and SW ₂ .
input to the gate. When the switches SW ₁ and SW ₂ are open, the intermediate value calculation circuit 5 is displayed on the display section 10.
Only the output signal of is input and displayed. When the switches SW ₁ and SW ₂ are closed, the output signals of the maximum value and minimum value detection circuits 3 and 4 are also input to the display section 10, and the output signals of the maximum value and minimum value detection circuits 3 and 4 are also inputted to the display section 10, and the output signals of the circuits 3 and 4 are inputted together with the contents of the intermediate value calculation circuit 5.
The maximum value, minimum value, and intermediate value of 4 and 5 are displayed simultaneously. As shown in FIG. 2, the display unit 10 includes a plurality of display elements L ₁ to L ₁₅ such as light emitting diodes, each of which sequentially displays values within a certain range of the exposure time signal, respectively. The objects are arranged in at least one row within the field of view 11 of the object image observation viewfinder. In Fig. 2, the operating ranges of these plurality of display elements are set corresponding to the shutter speed.For example, the display element _L6 that is currently lit is set to the maximum value Emax, which corresponds to the shutter speed of 1/250 seconds. , and L ₆ corresponds to a shutter speed of 1/60 seconds as the intermediate value Emid, and L ₁₀ corresponds to the minimum value Emin.
The figures below correspond to a shutter speed of 1/15 seconds. These multiple displays simultaneously show multiple exposure information of the subject you are photographing, that is, the light intensity of the bright and dark areas of the subject, making it easy to check the brightness difference between the bright and dark areas. be done. Therefore, the photographer can set the exposure taking into account the latitude of the film, and the exposure can be shown in accordance with the photographer's intention.

In the photometry circuit 1 shown in FIG. 3, a plurality of photodiodes P ₁ to _{P 25} connected in parallel are arranged in a matrix in a predetermined area corresponding to the photographing screen as shown in FIG. The anode of each photodiode Pi is connected to a pair of field effect transistors Tia, Tib (i=1, 2,...,
25) to the collectors of two transistors LT ₁ and LT ₂ . The gate of one field effect transistor Tia is directly connected to the output terminals 12-1, 12-2,..., 12-25 of the shift register 12.
Then, the gates of the other field effect transistors are connected to the output terminals 2-1, 12- of the shift register 12 via inverters NOT ₁ , NOT ₂ , ..., NOT _25, respectively.
2,...12-25. The shift register 12 sequentially outputs a high-level "1" pulse from its output terminal as a scanning command, and switches one field effect transistor T ₁ a, T ₂ a, ..., T ₂₅ a one after another to make it conductive. Therefore, when the shift register 12 is outputting a pulse from either output terminal, the field effect transistors T ₁ a,
At T ₂ a, ..., T ₂₅ a, only the field transistor whose gate is connected to the output terminal is in a conductive state. In addition, since the other field effect transistor Tib is connected to each inverter NOTi, the state is opposite to that of the above one field effect transistor Tia, and when the shift register 12 is outputting a pulse from its output terminal, the output terminal is Only one connected field effect transistor Tib is in a cutoff state and the others are in a conduction state. Due to the scanning operation of such a shift register, one transistor
Photocurrents generated by photodiodes P ₁ , P ₂ , . . . , P ₂₅ are sequentially passed through LT ₁ . Transistor LT ₁
The high input impedance amplifier circuit _A1 , whose input and output are connected to the collector and base, respectively, constitutes a negative feedback amplifier circuit together with the transistor _LT1 . Note that an operational amplifier may be used as the voltage follower circuit as the amplifier circuit _A1 . Furthermore, the amplifier circuit A ₂ connected to the collector and base of the other transistor LT ₂ is configured in the same manner as the amplifier circuit A ₁ described above. Due to the action of the amplifier circuit _A1 , the potential of the collector of the transistor _LT1 is kept almost constant, and the potential of the base of the transistor _LT1 is kept almost constant.
A voltage proportional to the logarithm of the collector current of the transistor _LT1 is output between the emitters, that is, from the output terminal 1b. In other words, shift register 12
In response to a scanning command given by , a voltage signal proportional to the logarithm of the brightness of the object light incident on each photodiode P1, P2, . . . , P25 in time series is output from the output terminal 1b.

The output of the photometry circuit 1 thus obtained is inputted into the information calculation circuit 2 indicated by the broken line block in FIG. 3, and is outputted as exposure time information. The information calculation circuit 2 is provided with an operational amplifier A ₁ and a constant current circuit 1, and further includes potentiometers PM ₁ and PM ₂ for setting information on film sensitivity and aperture. A voltage corresponding to the film sensitivity between the slider W ₁ of the potentiometer PM 1 _and the connection point a ₁ is added to the output voltage of the photometry circuit 1 as information on film sensitivity, and a voltage corresponding to the film sensitivity is added as information on the aperture. A voltage is output from which a voltage corresponding to the throttle between the slider W ₂ of PM ₂ and the connection point a ₁ is subtracted. In this case, if it is desired to find the aperture for the set exposure time, the information on the exposure time may be provided in place of the aperture information by the information calculation circuit described above. Next, the maximum value and minimum value detection circuits 3 and 4 are configured as binary counters such as an up counter 13 or a down counter 18 in well-known feedback comparison type A-D converters, respectively, as shown in FIG.
It uses In the maximum value detection circuit 3, the coefficient contents of the up counter 13 are cleared by resetting, but in this state, the output terminal 1 of the D-A conversion circuit 14 connected to the up counter 13 is
The voltage level of 4a is the lowest level that the circuit 14 can output. The comparison circuit 15 receives the input 15a from the information calculation circuit 2 and the input 15b from the DA conversion circuit 14 as analog values, compares the voltage levels of both inputs, and determines that the level of one input 15a is higher than that of the other. When higher than input 15b
A high level or "1" signal is applied to the AND gate 16 to allow the passage of the clock pulse from the pulse generator G and input it to the up counter 13 as a digital value, while the input 15b from the other side, in other words, D-A. When the output level from the conversion circuit 14 becomes higher than that from one input 15a, it outputs "0" and closes the AND gate 16 to prevent passage of the clock pulse. In this manner, when the analog voltage applied to the input 15a from the information calculation circuit 2 changes, the A-D converter 3 continuously converts the maximum value of the voltage into a digital value via the up counter 13.

Therefore, when measuring photometry, the up counter 1
3 is reset, "1" is input from the measurement start circuit S to the terminal 16a of the AND gate 16 while the photodiodes P ₁ , P ₂ , ..., P ₂₅ of the photometry circuit 1 are being scanned by the scanning circuit 1a. During this time, the maximum value in the voltage signal from the information calculation circuit 2 is converted from analog to digital, and the count contents of the up counter 13 are transferred to the storage register 17 after the scanning is completed.

In FIG. 4, the minimum value detection circuit 4 is constructed by replacing the up counter 13 in the maximum value detection circuit 3 described above with a down counter 18. When the down counter 18 is reset, the D-A conversion circuit 19 connected to the down counter 18
The voltage level of the output terminal 19a of the circuit 19 is the highest level that the circuit 19 can output, and from this state, every time the down counter 18 counts a pulse, the voltage level of the D-A converter circuit 19 is increased by a predetermined unit of voltage. The output level continues to decrease. The comparator circuit 20 gives a signal of "1" to the AND gate 21 when the level of the input 20a from the information calculation circuit 2 is lower than the input 20b from the DA converter circuit 19, while the relationship between these input levels is reversed. Then, a signal of "0" will be given. Therefore, the minimum value detection circuit 4
Similar to the maximum value detection circuit 3, when a voltage signal is applied from the information calculation circuit 2 during the period of scanning by the scanning circuit 1a, the lowest level signal among the signals is converted into a digital value, and after the scanning is completed, the down counter is applied. Eighteen digital signals are transferred to storage register 22.

Further, the intermediate value calculation circuit 5 is composed of a k value setting circuit 23 and an arithmetic circuit 24;
The value setting circuit 23 sets the value of k to, for example, 0,
It is configured so that five types of values, 0.25, 0.5, 0.75, and 1 can be set, and these numerical values are converted into codes suitable for digital calculation in the arithmetic circuit 24, and the arithmetic circuit 24 stores the memory registers 17 and 2.
The calculation shown in equation (1) above is performed using the digital signal from 2 as input. This calculation result is input to an exposure time control circuit P provided in the camera and simultaneously sent to a decoder 8. The maximum value and minimum value detection circuits 3, 4 and the intermediate value calculation circuit 5 are connected to a display section 10 as shown in FIG. 5 via decoders 6, 7, 8, respectively. Now, FIG. 5 shows a display circuit to which digital signals from the maximum value and minimum value detection circuits 3 and 4 and the intermediate value calculation circuit 5 are input as 4-bit information signals. There are 16 states for a 4-bit input, but for example, the output for an input indicated by "0000" is meaningless, so we omit it and take the display output for the remaining 15 states such as "0001". Each decoder 6, 7, and 8 is provided with 15 output terminals, and one of the 15 output terminals is selected depending on each input.
The configuration is such that only two output terminals are at a high level "1". In addition, in FIG. 5, each decoder 6, 7, 8 is used as the switches SW ₁ and SW ₂ shown in FIG. 1.
AND gates AND1 to AND8 are used on the input side. Normally, if a "0" signal is given to terminal 3a on one side of each AND gate, the AND gate will open.
Since AND1 to AND8 are closed, the input to decoders 6 and 7 is "0000", so decoders 6 and 7
No output appears from the decoders 6 and 7, but when there is no "0" signal at the terminal 3a, outputs appear from the decoders 6 and 7. Each of the decoders 6, 7, and 8 is configured in the same circuit, and outputs a "1" signal from the same output terminal in response to the same input signal. The corresponding output terminals of each of the three decoders 6, 7, and 8 are connected to the input of one OR gate,
Furthermore, one light emitting element L1 to L15 such as a light emitting diode is connected to each of the outputs of the OR gates _OR1 to _OR15 . Therefore, even if signals are input to each of the decoders 6, 7, and 8 at the same time, the display section can simultaneously display the signals corresponding to the inputs via the respective OR gates. In this way, the light is measured by the photometry circuit 1, and the difference between the bright and dark areas of the subject is displayed on each of the light emitting elements _L1 to _L15 of the display section 10. The above is an arrangement in which the appropriate exposure time for each of the bright and dark areas is simultaneously displayed on a dot-type display device as shown in FIG. 2, thereby visually displaying the difference between them. Apart from such an embodiment, the difference between the outputs of the maximum value detection circuit 3 and the minimum value detection circuit 4 may be determined, and a display may be performed according to this difference. Various other arrangements of the circuit for such display are possible. Further, although an embodiment using 25 light receiving elements has been shown in the photometric circuit 1, the number is not limited to this. Furthermore, the photometry circuit 1 may have one light receiving element to perform spot photometry, and the photographer may manually scan the exposure meter over the subject to obtain information about each part of the subject. . Further, for example, by adding a gate circuit to each of the light receiving elements P ₁ to _{P 25} in the circuit shown in FIG. 3, any one light receiving element can be selected and used.

The present invention further improves the above configuration so that the brightness information of the part intended by the photographer is measured and stored in two or more areas according to the photographer's command, and the information is displayed in dots. The system is configured to simultaneously display images on multiple display devices.

FIG. 6 shows an embodiment of the invention. In other words, the circuit shown in FIG. 6 uses two or more light emitting elements.
Two dot display sections 30 and 32 are arranged in a column, one display section 30 displays the respective outputs of the maximum and minimum value detection circuits as shown in FIG. 2, and the other display section 32 displays the outputs of the maximum and minimum value detection circuits. As a display of the latitude L of the film used for photography, the exposure amount and film density are in a proportional relationship, and the exposure range is displayed in correspondence with the maximum and minimum value display, and the maximum and minimum brightness of the subject is displayed. To easily check whether or not the film is within the latitude of the film. The analog output of the information calculation circuit 2 in FIG. 1 is input to the A-D conversion circuit 25 and converted into digital data each time one photoelectric element of the photometric circuit 1 is scanned, and then the maximum value as shown in FIG. 7 is obtained. , are connected to the minimum value detection circuits 3' and 4'. The K value setting circuit 23 and calculation circuit 24 connected to the maximum value and minimum value detection circuits 3' and 4' are the same as those shown in FIG. The film latitude setting circuit 26, which is composed of an encoder, determines the latitude of the film used in the camera.In other words, the latitude L of a negative color film is expressed in the same unit as the apex index. If the value is set as 1/2L, which is half of the film latitude, it will be encoded into a signal suitable for calculation. This 1/2L
The encoded signal is input to the adder circuit 27 and added to the output signal of the arithmetic circuit 24, and at the same time, it is input to the subtractor circuit 28 and conversely subtracts the 1/2L signal from the output signal of the arithmetic circuit 24. Therefore, the difference between the outputs of these circuits 27 and 28 is the film latitude L, and each of the outputs is centered on the output of the arithmetic circuit 24, that is, a signal corresponding to the aperture value or shutter speed to be set in the camera. This corresponds to the point of ±1/2L.
The dot display devices 29 and 31 that display the outputs of the circuits 3' and 4' and the circuits 27 and 28 are circuits for simultaneously lighting up two signals on the display sections 30 and 32, respectively, and are similar to the circuit shown in FIG. It is composed of The maximum value detection circuit 3' in FIG.
As shown in the figure, it consists of a conventionally known comparator 34 and a latch circuit 35 connected to a register 33 included in the A/D conversion circuit 25. The register 33 is made up of a latch circuit, and the A-D converted contents are temporarily transferred.The contents of this register 33 and the contents of the latch circuit 35 are compared by a comparator 34, and the contents of the latch circuit 35 are larger. If they are equal, an "H" signal is output to the output terminal 34a. When the latch circuit 35 receives an "H" signal from the comparator 34, it reads the contents of the register 33, so that the maximum value of the values given to the register 33 is taken into the latch circuit 35. Moreover, the minimum value detection circuit 4'' is the comparator 3 shown in FIG.
Inverter (NOT circuit) to output terminal 34a of 4
is connected so that when the output of the comparator 34 is "L", a latch signal of "H" is given to the latch circuit, so that the minimum value given to the register 33 is taken into the latch circuit 35. .

The arithmetic circuit 24 that performs photographic arithmetic operations is well known, but its principle can be explained with reference to FIG.
The closed circuit consisting of E ₁ , photodiode PD ₂ and diode D ₁ is a photoelectric conversion circuit that obtains a voltage signal proportional to the logarithm of the brightness of the light incident on photodiode _{PD 2 from} between the terminals of diode D ₁ .
The terminal voltage V _B is the apex index of the subject brightness.
It is proportional to Bv. A circuit in which potentiometers PM ₃ and PM ₄ are connected in parallel to another power supply E ₂ generates voltage signals Vs, V _A proportional to the film sensitivity and the apex index Sv, Av of the lens diaphragm.
and performs predetermined calculations to obtain a voltage signal proportional to the apex index Tv of the exposure time.

As is well known, the conditional expression for the appropriate exposure time in Apex is expressed as Tv=Bv+Sv-Av (1). Therefore, in FIG. 8, the voltage between the sliding terminal W ₃ of the potentiometer PM ₃ and the connection point P ₃ between the power source E ₂ and the potentiometer PM ₃ is set to a value corresponding to the apex index of the film sensitivity.
Vs is the voltage between the sliding terminal W ₄ of the potentiometer PM ₄ and the connection point P ₃ between the power supply E ₂ and the potentiometer PM ₄ to a value corresponding to the apex index of the aperture value.
When V _A , the voltage V _T between ground wire P ₁ and terminal P ₄
is V _T =V _B +Vs - V _A , and voltage V _T corresponds to the shutter speed apex index Tv obtained by the calculation shown in equation (1).

Note that potentiometers PM ₃ and PM ₄ are connected to power supply E _2.
The voltage Vs′ between the point P′ ₃ connected to the negative pole of and the sliding terminals W ₃ and W ₄ of the potentiometers PM ₃ and PM ₄ is
If V _A ′ corresponds to the apex index of the film sensitivity and aperture value, the voltage V _T becomes V _T =V _B −Vs′+V _A ′, and in this case too, electrical calculations corresponding to photographic calculations are performed. , the voltage V _T corresponds to the apex index of the proper shutter speed. In FIG. 8, the sliding terminal W ₃ of the potentiometer PM ₃ and the power supply E ₂ ,
The voltage between the connection point P ₃ and the potentiometer PM ₃ is set to a value corresponding to the apex index of the film sensitivity.
Vs, sliding terminal of potentiometer PM ₄ W ₄ and power supply
E ₂ , the voltage between potentiometer PM ₄ and the connection point P ₃ to a value corresponding to the aperture index
V _A , the potential V _T at point P ₄ with respect to the bus P ₁ is V _T = V _B + Vs − V _A ...(2), and the voltage V _T is the shutter value obtained by the calculation shown in equation (1). It can be seen that it corresponds to the apex index of speed.

Effects of the Invention As is clear from the above, the present invention comprises a photometric circuit that measures the light intensity of a part of a subject and a number of display sections arranged in a row, and corresponds to the photometric value output from the photometric circuit. a first display means for setting a display section to a display state; a second display means disposed in parallel with the first display means for displaying an index related to reproduction density on the film; and a second display means for outputting an exposure control value. means, and a moving means for relatively moving a display section that is brought into a display state in accordance with the photometric value of the first display means and an index of the second display means in accordance with the exposure control value output means. The present invention provides an exposure display device that is characterized by the following, and enables quantitatively determining an exposure more appropriate to express the photographer's intention in creating an image.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the structure of the exposure meter, Figure 2
3 is a circuit diagram showing the specific configuration of the photometry circuit and the information calculation circuit, FIG. 4 is a specific configuration diagram of the maximum value and minimum value detection circuit, and FIG. FIG. 5 is a circuit diagram showing the connection between the decoder and the display section, FIG. 6 is a block diagram showing the configuration of a light meter with two display sections according to the present invention, and FIG. 7 is a diagram showing the maximum value detection circuit. A circuit diagram showing the configuration, and FIG. 8 is a diagram explaining the principle of the arithmetic circuit. 1...Photometering circuit, 2...Information calculation circuit, 3...
Maximum value detection circuit, 5... Intermediate value calculation circuit, 4...
Minimum value detection circuit, 10...display section, _P1 to _P25 ...
Light receiving element, _L1 to _L15 ...display element.

Claims (1)

[Claims] 1. Consisting of a photometric circuit that measures the light intensity of a part of the subject, and a number of display sections arranged in a row, the display section corresponding to the photometric value output from the photometric circuit is displayed in a display state. a second display means disposed in parallel with the first display means for displaying an index related to the reproduction density on the film; a means for outputting an exposure control value; It is characterized by comprising a display section that is brought into a display state in accordance with the photometric value of the display means and a moving means that relatively moves the indicator of the second display means in accordance with the output of the exposure control value output means. Exposure display device.