JPH01302336A - Camera - Google Patents

Abstract

PURPOSE:To automatically determine the printing exposure of an automatic print system in a developing place in accordance with its information by recording the difference between the quantity of flash light for photographing and the preliminarily set quantity of light on a recording medium. CONSTITUTION:When the detected quantity of light of a flash light quantity detecting circuit 12 is larger than the set quantity of light of a flash light quantity setting circuit 11, information indicating 'reduction of the printing exposure' is recorded on the recording medium by a flash light quantity excess/deficiency recorder 14 because of over-exposure of an object; but when it is smaller, information indicating 'increase of the printing exposure' is recorded. In the developing place, indication information of the printing exposure is automatically read from the recording medium having these information in the enlargement process, and the printing exposure is changed in accordance with this indication information. Thus, photographic prints of good quality are obtained though the quantity of flash light is excessive or deficient.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photographic information recording device for a camera.

(Prior art) A conventional device of this type is disclosed in Japanese Patent Application Laid-open No. 59-1625, for example.
As disclosed in Japanese Patent Application No. 32, there is a known device that imprints a signal indicating whether or not a strobe is used as a data signal outside the photographing screen of the film during photographing.

When the presence or absence of strobe photography is recorded on the film as this data signal, the print system reads the strobe photography signal. When that information is obtained, the printing system automatically provides feedback to apply appropriate color correction to the printing conditions of the photographed screen. In this way, high quality prints can be obtained without the need for skilled workers.

(Problems to be Solved by the Invention) However, the conventional apparatus described above records only the presence or absence of strobe photography (flash photography) and adds appropriate color correction to the printing conditions when flash photography is performed. Therefore, if the actual amount of flash light emitted at the time of shooting is different from the amount of light emitted in advance for the flash light control of 2Tl, it is difficult to obtain high-quality prints at the photo lab without skilled workers. The problem was that it could not be done.

The present invention has been made in view of the above-mentioned conventional problems, and is designed to prevent the amount of flash light emitted during flash photography from being too much, too little, or too much compared to the preset amount of light emitted for light emission control of the flash device. The purpose of the present invention is to provide a camera that can record information for automatically setting the exposure amount for printing and obtaining high-quality prints in a photofinishing laboratory without requiring the manual labor of skilled workers. .

(Means for solving the problem) In order to achieve the above object, the present invention calculates the difference between the amount of light emitted by the flash device and the amount of light emitted during flash photography. , and the results are recorded on a recording medium.

(Function) In the present invention, the difference between the amount of flash light emitted at the time of photographing and the preset amount of light emitted is recorded on the recording medium, so in the photo lab, the exposure amount of the automatic printing system is adjusted according to that information. can be determined automatically.

(Embodiment) FIG. 1 shows an embodiment of the present invention, and is a block diagram of a camera.

This camera is equipped with an electronic flash device 9, and the TT
With the L automatic light control system, during flash photography, the reflected light from the subject that has passed through the photographic lens is received by the light receiving element 11 at the bottom of the body, and when the reflected scene reaches a predetermined light control level, the electronic flash device 9 stops emitting light. It is configured to allow

This camera includes a control circuit 1 made up of a microcomputer, and the control circuit 1 performs various controls described below.

The film sensitivity reading circuit 2 reads the film sensitivity of the film loaded into the camera using the DX system, and outputs film sensitivity information to the control circuit l.

In the photometry circuit 3, a photometry light receiving element (not shown) is arranged in the viewfinder of the camera, and receives the subject light incident through the photographic lens and sends photometry information corresponding to the light to the control circuit 1.
Output to.

The lens information output circuit 4 outputs lens information such as the aperture F value, focal length, and exit pupil position of the attached photographic lens to the control circuit 1.

The photographing distance output circuit 5 outputs the imaging distance M (subject distance) of the attached photographic lens to the control circuit 1, and is disposed within the photographic lens as a photographing distance encoder.

The exposure value calculation circuit 6 calculates an exposure value from the photometric information, film sensitivity information, etc. output from the control circuit 1, and outputs the exposure value information to the control circuit 1.

The shutter control device 7 and the aperture control device 8 control the shank and the aperture based on exposure value information.

The flash control circuit 16 outputs a flash start signal to the flash device 10 in response to turning on the X contact by operating the camera's shirt button, and the flash tube A starts emitting flash light.

The flash light emission amount setting circuit 11 sets a predetermined light control level (emission light amount) in advance in order to control the stop of light emission of the flash device 10, and outputs this light control level to the flash control circuit 16.

The flash light emission amount detection circuit 12 detects whether the flash device 10
The amount of flash light emitted by the flash device 10 is monitored by the light receiving element 15, that is, the reflected light from the subject due to the flash light emission is detected, and the amount of light emitted from the flash device 10 is determined by integrating the light amount of this reflected light.

The flash control circuit 16 sends a flash stop signal to the flash device when the flash amount of the flash device 10, that is, the amount of light detected by the flash amount detection circuit 12, reaches the dimming level set by the flash amount setting circuit 11. 10.

The flash light emission amount excess/deficiency/excess calculation circuit 13 calculates the light emission amount of the flash device 10 detected by the flash light emission amount detection circuit 12 and the light control level (light emission amount) set by the flash light emission amount setting circuit 11.
is compared with.

In normal flash photography, the flash light emission amount excess/deficiency/excess calculation circuit 13 calculates the detected light emission amount of the flash light emission amount detection circuit 12 and the set light emission amount (!I! light level) of the flash light emission amount setting circuit 11.
Since they match, there is no need to calculate whether the amount of flash light is too much or too much.

However, in close-up flash 11% shadow photography and long-distance flash photography, the subject may not be properly irradiated with flash light, resulting in, for example, underexposure or overexposure of the subject. In such a case, in the flash light emission amount excess/deficiency/excess calculation circuit 13, the light emission amount detected by the flash light emission amount detection circuit 12 and the set light emission amount (light adjustment level) of the flash light emission amount setting circuit 11 do not match. Then, the flash light emission amount detection circuit 12
If the detected light emission amount is larger than the flash light amount set by the flash light emission amount setting circuit 11, the subject has been overexposed, and the flash light emission amount excess/deficiency/excess recording device 14 records "burn-in" on the recording medium, which will be described later. In the opposite case, the subject is underexposed. Record information indicating that the exposure amount should be increased.

And a camera flash light emission amount excess/deficiency/excess recording device 14
The recording medium with the information recorded thereon will be removed from the camera and used in the laboratory's automatic printing system. During the "enlarging" process at the photofinishing laboratory, the printer automatically reads the exposure instruction information and changes the exposure amount according to the instruction information to obtain high-quality prints.

This recording medium may be, for example, a portion of a film outside the photographic screen, or an EFROM built into a film cassette or the like. In order to record information on this recording medium, for example, the recording medium 214 is configured with an optical recording method or a magnetic recording method, and by these methods, information is optically recorded on the part of the film outside the shooting screen. Information is imprinted magnetically, or magnetic tape is placed outside the shooting screen. Furthermore, when the recording device 14 is configured using an electrical recording method,
Information is recorded in an EFROM built into a film cassette or the like.

It should be noted that the present invention is not limited to the above-described embodiments and can be modified as appropriate. In the embodiments, a TTL automatic light control type flash device has been described, but for example, a flash device built in a lens shutter camera etc. It can also be a device. This will be explained in detail below.

This camera has a built-in flash device 10, and an external light receiving element 15 receives light reflected from a subject by the flash device 10, and the flash device 10 is controlled by a GN control method.

Since it is a GN control system, the aperture is controlled based on the shadow distance information from the shadow distance output circuit 5, and the amount of flash light emitted by the flash device IO is controlled.

For example, if the aperture value under GN control is outside the interlocking range of the aperture control device 8, the shortfall will result in an excess or deficiency in the amount of flash light irradiated to the subject, and the above-mentioned embodiment Similarly, the excess/deficiency/excess of the flash light emission amount is detected by the flash light emission amount excess/deficiency/excess calculation circuit 13 and recorded on a recording medium by the recording device 14.

(Effects of the Invention) As described above, in the present invention, even if there is an excess or deficiency or excess in the amount of flash light irradiated to the subject during flash shooting, the information is recorded on the recording medium, so it is possible to In some places, that information is automatically read, and in the "enlargement" process, the printing exposure can be changed according to that information, making it possible to obtain high-quality prints.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of the present invention, and shows a block diagram of a camera. (Explanation of symbols of main parts) l... Control circuit (microcomputer) 12...
Flash light amount detection circuit,

Claims (1)

[Claims] a flashing means; a light emission amount setting means for setting a light emission amount for controlling the light emission of the flash means; a light emission amount detection means for detecting a light emission amount of the flash means when flash photography is performed; A light emission amount excess/deficiency/excess calculation means for calculating the difference between the light emission amount set by the light emission amount setting means and the light emission amount detected by the light emission amount detection means; 1. A camera comprising: recording means for recording the difference output on a recording medium.