JPS60190077A - Camera provided with electronic view finder - Google Patents

Abstract

PURPOSE:To pick up a picture in response to the preferance of a photographer by making a picture of an electronic view finder corresponded to an exposure control value to observe the finish state of the photograph in advance at the electronic view finder. CONSTITUTION:The light of an object 5 is measured by a solid-state image pickup element 1 and a photometric output is converted into a characteristic of a film density at a latitude correction circuit 12 through an amplifier 7, an LPF 8 and a gain adjusting circuit 11 and led to the electronic view finder 13. On the other hand, a voltage V0 in response to a value (TV-SV+DELTAAV) depending on a shutter second value TV, a film sensitivity SV and a number of stage of stop DELTAAV from an exposure control circuit 16 is led to an OSC 20 and a reference pulse signal phi0 whose pulse period is changed in response to the V0 is led to a drive pulse generating circuit 6 from the OSC 20, the each picture element of the solid-state image pickup element 1 is scanned in the period changed in response to the V0 and also a synchronizing signal of the finder 13 is supplied. Thus, a picture in response to the density of the photograph obtained by film pickup is displayed in the finder 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a camera equipped with an electronic viewfinder, and more particularly to a camera that takes pictures while monitoring the output of an image sensor with an electronic viewfinder.

(Prior Art) Conventionally, an automatic exposure control device for a camera that allows shooting to be performed at an optimal exposure value even when shooting a subject with large brightness differences between parts of the shooting area, such as during backlight shooting, has been used, for example.
It is known from K such as JP-A No. 57-42024. However, when looking at the finish of a photo, there is no absolute standard for evaluating a photo, and each person evaluates what kind of photo is good, especially in terms of the shading of the subject. different. Furthermore, no matter how many shades of objects exist in the natural world, no two objects are the same.

Therefore, automation of exposure is nothing more than the greatest common denominator, and we often experience that the resulting image is far from the photographer's intention.

(Objective) In view of the above-mentioned points, an object of the present invention is to provide a camera equipped with an electronic viewfinder that can monitor the shooting situation using the electronic viewfinder. .

(Summary) The electronic viewfinder biased camera of the present invention controls film exposure based on shooting information such as film exposure time, film sensitivity, and aperture value of the photographic lens. ．． The present invention is characterized in that the scanning period of the image pickup device is controlled according to the output value, and the image of the electronic viewfinder is made to correspond to the nine exposure control values.

(Example) The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is a block diagram of an electrical circuit of a camera equipped with an electronic viewfinder, showing one embodiment of the present invention. The light-receiving surface of the solid-state image sensor 1 is colored red, yellow, and red.
Filter 2 is a color mosaic that separates into 6 green colors.
is arranged, and an infrared cut filter 3 is arranged in front of it.

Therefore, the light image of the object 50 is captured by the photographic lens 4 at 1iG.
When forming an image on the light-receiving surface of the solid-state image sensor 1, the subject light has infrared light removed by the infrared cut filter 3, and then passes through the mosaic color separation filter 2 to form an image on each of the solid-state image sensors 1. The solid-state image sensing device 1, which receives light at the pixels, is scanned by a drive pulse generated from the drive pulse generation circuit 6, whereby a photoelectric conversion signal is read out from each pixel as a color signal. This color signal is divided into a green (q signal) and a red (corner signal and back) signal, and is led to an amplifier 7 and amplified, and then the G signal is directly passed through a low-pass filter (
The R and B signals are respectively guided to the LPF 8 via sample and hold circuits (hereinafter abbreviated as 1 circuit) 9 and 10, and each of these color signals is It is considered to be a continuous signal. after that,
Each color signal of G, n, , and n is sent to a latitude correction circuit 1 via a G-in tone signal circuit 11 having a variable low resistance RVI e nVtrR for gain adjustment of the same color signal.
2. Latitude sleeve j [・1 time M 12ha G
, R, 1) No. 48, M45'C-t+1: K
? This is a circuit for approximating the 4'7 property to the 4th property of the film's density relative to the exposure amount. The above latitude correction circuit 12 is
, N, , B signals are sent to an electronic viewfinder 13 consisting of a cathode ray tube or the like, where an image of the subject to be photographed is projected. The synchronization signal generation port vr14 generates the drive pulses, receives the output from path 16, and sends horizontal synchronization signals Φ, 18 . This is a circuit that sends out a vertical synchronizing signal Φv8 and sends timing pulses to the four circuits 9 and 10 described in -H.

Further, this camera is capable of photographing a subject image transmitted through the photographing lens 4 by forming it into a film-like image, and for this purpose, a photographing information input circuit 15;
An r11 circuit 16 is provided. The output f::' control circuit 16 inputs the aperture value AV, film sensitivity S, shutter speed TV, correction value Cv, etc. set in the shooting information input circuit 15, and performs these shooting operations. The magnet is designed to perform calculations for exposure based on the information, and is connected to the terminal 17 to which the power supply voltage, 1-VDC, is applied, to control the running of the 7-year-old (;). 1
Magnet 1 that controls the travel of 8 and rl after the shutter
9 is connected. In addition, in this exposure control circuit 16, in order to make the image displayed on the electronic viewfinder 13 correspond to the image that is shot on the film, the exposure control circuit 16 uses the shooting information set in the shooting information manual input layer 515 as described below. If '11: is performed, this operation p: is the output voltage V. is guided to a reference pulse generation circuit (hereinafter abbreviated as 08C) 20. This 08
As will be described later, C20 generates a pulse signal when the output voltage of the exposure control circuit 16 introduced to the input side changes. The period T of is changed. Therefore, 08C20 is the period T that changes according to the value of the calculation output of the exposure control circuit 16 (of the f! pulse).

is sent to the drive pulse generation circuit 6. Also, the calculated output voltage of the exposure control circuit 16 is applied to the inverting input terminal of the comparator 21! 2. It's dark. A terminal 21a connected to the non-inverting input terminal of the comparator 21 receives the output voltage (2) of the exposure control circuit 16. A judgment voltage ■so equal to the lower limit of is applied, and therefore, the above f′ and the output voltage ■ of the output braking control circuit ♂1 are applied. When VBO becomes lower than the judgment voltage VBO, the comparator 21
The output of 1- is inverted so that the warning circuit 22 is activated. 1) A CV (piezo ceramic pipe rake) 23 is connected between the output terminal of the f-multiplying circuit 22 and the ground, and the P'CV 23 vibrates under the operating state of the warning circuit 22 and makes a noise. Do the following.

Figure 2 shows the solid-state camera 11 in the camera shown in Figure 1 above.
! FIG. 3 is an electrical circuit diagram of the element. This solid-state imaging λζ element 1 is M
It is an O8 type image sensor, and the 484 sensor provided on the light receiving surface
The array of photodiodes PD of The anode of each of these dies A-D PD is grounded, and the cathode is connected to the horizontal switching MOS of each column bare through the vertical switching MO8-FETQv, and the color signal is utility terminal OS
connected to the horizontal swiveling MOS-FE
T QH2 is for switching the element for red, g'' for blue, and child 0, and is connected to one color output terminal 02 for four times.The color signal output terminals o, , o, c- are connected to the load resistor It.
, , , are connected to the positive electrode of the target voltage E8 through the electrodes, and the negative electrode of the recurrent erosion E8 is grounded. Horizontal switching MO8FET QIH, Q11 for each column above
2 gate is the horizontal scanning pulse I-T of the horizontal scanning circuit 51.
, , H, . . . are connected to each output terminal that generates Ho4. Above vertical switching MOS-F
Vertical column selection lines TJVly y Ly□,...l LV484 are vertical scanning pulses V, , V, ,...
・Each output that generates v2at? It is connected to +U child. The horizontal set meal circuit 31 is driven by being supplied with a horizontal drive signal Φ18° from the drive pulse generating circuit 6, and the vertical scanning circuit 62 is driven by being supplied with the vertical tribe r1 Φ7° from the driving pulse generating circuit 6.

Figures 6 (A) and (B) show the operation of the above MO8 type image sensor.
, the vertical scanning circuit 32 generates vertical scanning pulses V, , V, , . TV, 4. are sent sequentially. First, the vertical scanning pulse ■ is at a high level (hereinafter referred to as
(abbreviated as "1.1") When K, select 19 in vertical column 1
(Lvt + LV2) is selected. In this state,
Horizontal p, 3fi: pulses H, , H from the horizontal scanning circuit 31
,,..., JT384 is sent out sequentially, (1, 38
4), (2,384)) are selected in this order. Next, when the vertical scanning pulse ■ becomes "H", the vertical column selection fPi (Lys r LV4) is selected,
In this state, horizontal scanning pulses H,, H,...JIB
A pixel is selected in m4. In this way, two vertical and horizontal scanning pulse trains ((1,1), (2,1
)).

Pixels are selected in this order, and one frame of scanning is completed.

As is clear from MT, 31gl (A) and (u), the horizontal synchronization 1 signal Φ1.80 period is the horizontal drive signal Φ□. jij direct synchronization (b
The period of the r number Φv8 is the period J of the horizontal 4JI signal Φ118.
(It is set to 80250 times.

As described above, one frame of scanning is performed, and by this selective scanning of the 10 pixels of the first sensor, green (C1, red 4 and i'+' (+3) color signals are sent to the two output terminals. (1) can be obtained from the mountain 0. For example, the G signal shown by the Iha current i in Fig. 3 (f) is obtained at the output terminal 01. This color signal is obtained according to the amount of light of the subject. There are two methods for detecting the amount of discharged charge as an image signal: (1) a method of detecting the peak value of the current flowing when charging the discharged charge; and (2) a method of detecting the peak value of the current flowing when charging the discharged charge. 41. Method of integrating the flow over the pixel scanning period f) 2
141i class, but in the above image sensor 1, (1
) method is used (・The amount of charge in this group 1 is the amount of discharged charge in the time required from when a certain photodiode PI) is specified until the same photodiode is specified again next time, and it is the amount of charge discharged in the time required for scanning one frame. proportional to time. That is, a reference pulse signal Φ from 08C20 that generates a pulse that serves as a reference for all scans. Since the amount of discharged charge of each pixel of the solid-state image sensing device 1 is determined by the period T of , it is possible to control the amount of discharged charge of each pixel by changing the period T of the reference pulse i: can. Naturally, when the amount of discharged charge in each pixel of the solid-state sensor 1 changes, the brightness of the image obtained by the electronic vinyl finder 13 changes.

By the way, now, T- is the scanning period of each pixel of the solid-state imaging element 1 which gives appropriate brightness to the image of the electronic viewfinder 16. Here, the appropriate brightness is, for example, 18
This is the brightness at which the brightness on both sides becomes 18% when photographing an object with a reflection density of 18%. In addition, the brightness of the screen obtained by the electronic viewfinder 16 is adjusted by gain adjustment and the rJf variable resistor RV of 1 path 11, , 几V, ,
It changes depending on the UV light, so be sure to check it beforehand.) Variable resistance Rr'V'+-11Vs wo/l yD, K f
i''J ff11 is set to correspond to the photographic density obtained on the film.

Therefore, if we use the apex value formula v1 for the scanning period T'' of each pixel of the solid-state image sensor 1, which gives the above-mentioned appropriate brightness, this value TV is the difference between the subject brightness B■ and the aperture value AVO. , Mine TV = BY - AVO + K ----@ (1) formula holds true. However, K is a constant determined by the solid-state image sensor 1 and the like.

On the other hand, from each shooting information of shutter speed value TV, film sensitivity S■, and aperture value AV that gives the appropriate exposure amount to the film, TV = oV - AV + 8V ------- (21 holds true, so, From II (1) and (2), TV =
TV-8V-(AVO-AV)+K =TV-8V+
jAV−)K −−−−−(3). However, ΔAV
is the number of stop-down steps representing the amount of stop-down from the open aperture. In other words, if each pixel of the solid-state imaging element 1 is scanned with a signal having a value "TV" that satisfies the above equation (3), the brightness of the image in the electronic viewfinder 13 corresponds to the photographic density obtained by shooting with film. In other words, if the scanning period of each pixel of the solid-state imaging probe 1 is controlled by the value '1'V''lC calculated based on the photographing information, the final quality of the photograph can be determined before shooting the film. The condition can be monitored using the electronic vinyl finder 13.

Therefore, the exposure control circuit 16 performs an exposure calculation for shutter control and also performs a calculation that satisfies the above equation (3).
Slightly corresponding voltage ■ S1° Loquat - δ This exposure control circuit 16
■ Output voltage. Accordingly, E, ゛# for sending to the IJ Harpal generation circuit 6; The period of is set to change.

The specific electric circuit of 08C20 in FIG. 1 is configured as shown in FIG. 4, for example.
Figure K shows OS C20, NPNm transistor, 42. Capacitor C, C, and resistor 8. An operational amplifier 44, I'NT' type transistors 45, 46 .
47 and a resistor are connected. The terminal 48 to which the base voltage VJ11 is applied is connected to the resistor 8 of the unstable multivibrator 40. It is connected to one input terminal of the operational amplifier 44,
The other input terminal of the operational amplifier 44 is connected to the collector of the transistor 45 which is grounded via a resistor. The bases of the upper nine transistors 45 to 47 are connected to the output terminal of the operational amplifier 44 to form a current mirror circuit. The emitter of the transistor 45 is connected to the output terminal preload connection 1. of the exposure control circuit 16 (see FIG. 1). The transistors 46 and 47
The emitter of is connected to the terminal 50 to which the voltage ■B2 is applied, and the collectors of the transistors 46 and 47 are, respectively,
Transistors 41, 4 of the astable multivibrator 40
2 are connected to each base. An output terminal 51 of the OS C 20 is drawn out from the collector of one transistor 41 of the non-shifted 8-constant multivibrator 40.

In the above 08C20, the collector voltage of the transistor 41 of the unstable multivibrator 40 is .

The base voltage is Vbx, and the collector voltage of the transistor 42 is c2. Pace voltage b! These voltages then become as shown in FIG. 5 in the 08C20 operating state. The reference pulse number Φ0 obtained from the output terminal 51 is the pulse (i) of the voltage vC1, and its pulse period T
is the current I flowing through the collector of the transistor 46
8, (C+ +Ct)■s10. .

T= □ ... (4) 8. That is, 82[;
Since l and the reference voltage ■8□ are constant values in this O8C20, the pulse period T is inversely proportional to the current l8tC. This current I to the input terminal 49 also changes depending on the pressure. That is, the voltage (2) corresponds to the value TV calculated by the exposure control circuit 16. It changes depending on K. For example, if the shutter time value TV in the photographing information input circuit 15 is set to one step faster, at this time,
The voltage ``o'' at the terminal 49 is lowered by about 18 mV with respect to the reference voltage V81' at the terminal 48. Then, at this time, the collector current of the transistor 45 flows through the operational amplifier 44 and the resistor ns.
The base current decreases so that it is kept at a constant value by
As a result, the electric current required is doubled. Current 1B is 2
When doubled, the reference pulse signal Φ issued by 08C20. According to the above equation (4), the period T becomes /0. Therefore, at this time, the amount of discharge charge in each pixel of the solid-state image sensor 1 becomes 1/2, and the image obtained by the electronic vinyl finder 13 also becomes 1/2. It gets darker.

FIG. 6 shows the relationship between the image quality and exposure amount of a print or slide developed after photographing the film. 6th
In the figure, the characteristics of negative film are shown by solid lines, and the characteristics of reversal film are shown by dashed lines. Exposure on the horizontal axis! Take IknogH(I(=illuminance form x x time S),
Taking image quality as the vertical axis, it is clear from Figure 6 that when the exposure amount is very small, the density of the film is low and details in dark areas are not rendered, resulting in poor print quality. As the exposure amount increases, the image quality gradually improves, and within a certain exposure amount range, the image quality obtained remains constant.

When the exposure amount exceeds a certain level, the density becomes too high and the image quality deteriorates. That is, the film has an exposure latitude that provides good image quality. Generally, the latitude wN of a negative film is wider than the latitude WnK of a reversal film.

The relationship between the image quality and the exposure amount described above also corresponds to the relationship between the exposure amount ogH of the film shown in FIG. 7 and the density of the photograph obtained when the film is developed. The density is expressed as D = Noog / when the transmittance of the film is τ.
It is expressed as If the density of the film is perfectly proportional to the exposure, it is perfectly direct! Although it is busy, the actual curve is a figure 8-shaped curve G7 as shown in Fig. 7, and the latitude is limited to the straight heald and concave in the center. Therefore, it is necessary for the output of the solid-state image sensor 1 to have a characteristic of exposure versus output voltage similar to this, so that the photographic image taken on film and the image of the electronic viewfinder 13 match.

Therefore, the output characteristics of the solid-state image sensor 1 are determined by the N of the film.
:) Y: (The latitude correction circuit 12 is used to approximate the density characteristics for 1%.

-l2iiq;Is 1.Specific details of the 2-chip correction circuit 12 in Figure 1. (The electric circuit j'ii is arranged, for example, as shown in FIG. 54 to 58 and switches 59 and 60 for switching between negative film and versatile film.
, comparators 61-66, and analog multiplexers 67-69. Terminals 71 to 73 are input terminals to which the G and JI3 color signals from the gain adjustment circuit 11 are applied, and terminals 74 to 76 are input terminals to which the G and JI3 color signals from the gain adjustment circuit 11 are applied, and the terminals 74 to 76 are input terminals to which G, JI3 color signals are applied to the electronic viewfinder 13.
11 and 'I3 are output terminals for sending out each color signal. Resistors 54 and 55. Each connection point of 55 and 56 is connected to switch 5.
9 negative side contact a + reversal side contact bK each 1+
l: 5 are connected, and the connection points of resistors 56 and 57, 57 and 58 are the reversal side contact of the switch 60, and the negative side contact a.
Both are connected. The movable contact piece of the switch 59 is connected to the non-inverting input terminals of the comparators 62, 64, 66, and analog multiplexers 67-6.
9, the movable contact of the switch 60 is connected to the non-inverting input terminal of the comparator 61, 65, 65, and the analog multiplexer 67 to
69 is connected to the second input terminal l]e. The inverting input terminals of the comparators 61, 62 and the third input terminal of the analog multiplexer 67 are connected to the input terminal 71, and the inverting input terminals of the comparators (53,<54 and the third input terminal of the analog multiplexer 68 are connected to the input terminal 71, respectively). It is connected to the terminal 72, the inverting input terminal of the comparators 65 and 66, and the third input terminal of the analog multiplexer 69.
The input terminal of is connected to the input terminal 73 mentioned above. The output terminals of the comparators 61 and 62 are connected to an analog multiplexer 67 for switching the input and output of the analog multiplexer 670 depending on the output levels of the comparators 61 and 62. The output terminals of comparators 65 and 64 and the output terminals of comparators 65 and 66 are also
Similarly, analog multiplexers 6B and 6 respectively
9 is connected. Analog multiplexer 67-6
Output 1 of 9! :Il child is this lachigoude correction circuit 1
20 output i; electrons 74-76.

From the gain adjustment circuit 11 to the latitude correction circuit 12
The input voltage V° V applied to each input terminal 71 to 73 of
o VBi is compatible with exposure fi1m. Resistance (ll,
The voltage at each connection point of R1゜54 to 58 is Via>V)tb>
The relationship is Vt,b>Vt,a. For example, to explain the operation of the latitude correction circuit 12 regarding the q signal currently applied to the input terminal 71 as a voltage 'vGi, in the state where the switches 59 and 60 are connected to the negative side contact aK, the switch Voltage h due to 59.60
8, Vt, and a are led to 5&C. Input voltage V. If i does not reach the voltage V, the outputs of the comparators 61 and 62 both become "■-I", and at this time, the analog multiplexer 67 outputs VG to the output terminal 74.
Send O== Vl,a. Also, the input voltage vGl
When is more than the voltage 'vI,a and less than the voltage Via,
The output of the comparator 61 becomes "L" and the output of the comparator 62 becomes "H", and at this time, the analog multiplexer 67 sends VGO=Vai to the output terminal 74.

Furthermore, when the input voltage VGi becomes larger than tb:voltage vtta (J, 1.5), the outputs of the comparators 61 and 62 both become NLI+, and at this time, the analog multiplexer 67 sends the output terminal 74 to ■Go. Sends =v□. That is, the voltage Vai of the input terminal 71 is equal to the exposure i1
c, the voltage VGO at the output terminal 74 changes as shown by the solid line in FIG. As is clear from comparing FIG. 7 with the above-mentioned FIG. 7, this figure approximates the characteristic of negative i and '% degree with respect to the exposure amount. Incidentally, with the characteristics shown in FIG. 9, level l is a level at which an appropriate density can be obtained.

In addition, when the switches 59 and 60 are connected to the reversal side contacts, the voltage Vnb
+vLb is guided so that the input T(L
When the voltage vGi changes, the operation is similar to that described above, and the voltage VaO at the output terminal 74 is at one point *i'! in FIG. It changes as shown in a.

The voltages Vni and VBi are applied to the input terminals 72 and 73, respectively.
The same applies to No. 89 which is applied as above, and the output terminals 75 and 76 have voltages according to the f4M characteristic shown in FIG. , VaO is obtained. Like this K.

When negative film is used, the output characteristics are as shown by the solid line in Figure 9, and when reversal film is used, the input and output characteristics are as shown by the single point blind line, and the output characteristics are 0 degrees according to the latitude code of each film. '+TN pressure is obtained.

As described above, in a camera equipped with an electronic viewfinder 13, when the photographic lens 4 is directed toward the subject 5 to be photographed, the solid-state image sensor 1 measures the light of the subject, and this photometric output is sent to the amplifier 7. ．． LPF8゜gay7 nl
It passes through the a-correction circuit 11, is converted into film density characteristics by the latitude correction circuit 12, and is guided to the electronic viewfinder 16.

On the other hand, yl (shutter time value T from the small control circuit 16)
V, film sensitivity Sv, and voltage according to the value determined by the number of aperture stages ΔAV (TV-8V + ΔAV).

is changed to O8C20, and from 08C20 there is a reference pulse No. 748 Φ whose pulse period changes according to the input voltage ○. is guided to the drive pulse generation circuit 6, each pixel of the solid-state image sensor 1 is scanned at a period that changes according to the output voltage VO of the exposure control circuit 16 described in -, and the synchronization signal of the electronic viewfinder 16 is is given.

Therefore, the electronic viewfinder 13 displays an image corresponding to the 4th degree of the photograph obtained by film photography.

Therefore, if the photographer determines that the image in the secondary viewfinder 16 is too bright, for example, he can increase the shutter speed value TV or increase the number of aperture steps JAV. The output voltage ■o of the exposure control circuit 16 decreases, so that the reference pulse signal Φ. The period T becomes shorter, and the image f1 of the electronic viewfinder 13
concentration decreases. Then, the shutter speed value TV or the number of aperture steps ΔAY is adjusted so that the density of the image in the child viewfinder 13 becomes the optimum density.
”, -, when the shutter release is performed, the exposure control circuit 16 issues a signal to de-energize the magnet 18 for locking the leading curtain, and then the magnet 1 for locking the trailing curtain is activated.
A signal is issued to cancel the excitation of 9 and terminates the Jl'r'r output, but at this time, the J% output J11- is 111. A photographic density equal to the image density of the child viewfinder 13 can be obtained.

When the output voltage VO of the exposure control circuit 16 becomes very small and the period T of O8C20 becomes too short, the period of the horizontal drive signal Φ101 and the vertical drive signal ΦVO sent from the drive pulse generation circuit 6 to the solid-state image sensor IK. In this case, the electronic viewfinder 13 will not be able to correctly reproduce the image. If the output voltage o of the exposure control circuit 16 decreases to a limit value at which it is not correctly reproduced, the comparator 2
1 changes from the ``L'' level to the 7H'' level, the warning circuit 22 is activated, the PCV 25 sounds and alerts the photographer, and the image on the electronic vinyl finder 13 becomes a photograph obtained by film shooting. The photographer is informed that the images do not match. Therefore, in this case, the photographer sets the shutter time value TV and the film sensitivity Sv.

By appropriately changing the set value of photographing information such as the number of aperture steps ΔAY, it is possible to monitor an image corresponding to the finished photographic image again using the electronics and the knee finder 13.

In the above embodiment, the equation (3) of the calculation Yamao of the exposure control circuit 16 is based on the premise that photometry is performed with an open aperture;
V" may be decreased. When performing aperture metering, the open aperture value AVO in equation (1) above corresponds to the actual aperture value AV, so TV = BV - AV 1K.
...(5), and from this equation (5) and the above equation (2), we get TV=TV-8V-1-K -(6). As is clear from equation (6), in this case, the information on the aperture value AV is not included in the parameter, and the photometry of the solid-state image sensor 1 can be performed by changing the shutter time value TV and film sensitivity SV. The time (scanning cycle) changes, and the image on the electronic viewfinder 13 changes depending on the photographic image taken on film.

(Effects) As described above, according to the present invention, the finished state of a photograph can be observed in advance using an electron and a knee finder.
It is possible to take photos according to the photographer's preferences. Also,
It is possible to change the image density of the ``C electronic vinyl finder according to the latitude of the film, making it compatible with negative film, reversal film, etc., and also to set shooting information that cannot reproduce accurate images with the electronic vinyl finder. It has excellent effects, such as being able to inform the camera operator of the donations made through a waiting notice.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an electric circuit of a camera equipped with an electronic vinyl finder showing an embodiment of the present invention, and Fig. 2 is an electric circuit diagram of a solid-state image sensor in the camera shown in Fig. 1 above. Figure 3, <131 is the time chart of each part in the electric circuit shown in Figure 2 above (ILF issue, Figure 4 is
flu showing an example of the reference pulse generation circuit in FIG. 1 above.
5 is a time chart of the signals of each part of the reference pulse generation circuit shown in FIG. 7 is a diagram showing the characteristics of negative density with respect to exposure amount, FIG. 8 is an electric circuit diagram showing an example of the latitude correction circuit shown in FIG. 1 above, and FIG. 9 is a diagram showing the latitude correction circuit shown in FIG. 8 above. FIG. 3 is a diagram showing input/output characteristics of the correction circuit. 10... Fist solid image element 12 - Fist φ floating chideade correction circuit 13-@-... Electronic vinyl finder 16...
Exposure control circuit 22.1...Disputation circuit Patent applicant Olympus Optical Co., Ltd. Agent
Fujikawa 7 part 1; -Blade ww and Ichitsuta Figure 3 (B) Satoshi'' -+-j Knee- and Figure 4 are also 5th section no'oqH exposure 1 1shi 9 β Tsuta 1oc) H exposure cover

Claims (3)

[Claims] (1) In a camera that monitors the photometric image output of the image sensor using electronics and a knee finder, the film exposure is controlled based on film shooting information such as the film's exposure time, film sensitivity, and the aperture value of the photographic lens. A camera equipped with an electronic viewfinder, comprising: means for controlling the photometry time of the imaging probe according to a value calculated based on the film shooting information. (2) In a camera that monitors the photometric image output of an image sensor using an electronic vinyl finder, means for controlling film exposure based on film shooting information such as film exposure time, film sensitivity, and aperture value of a photographic lens; , means for controlling the photometry time of the image sensor according to a value calculated based on the film shooting information; means for correcting the latitude by approximating the characteristics, and the electrons according to the output of the latitude correction means;
- A camera equipped with an electronic viewfinder that reproduces the 5K viewfinder image. (3) The camera monitors the photometric image output of the image sensor using an electronic vinyl finder, and controls the film exposure based on film shooting information such as film exposure time, film sensitivity, and aperture value of the photographic lens. means for controlling the photometry time of the image sensor according to the value calculated based on the film shooting information;
A camera equipped with a means for emitting an F notice, and an electronic viewfinder comprising: