JPH09211687A - camera - Google Patents

Abstract

(57) [Abstract] [Problem] Even if the film density of the underexposure is such that the distance to the subject is long with respect to the amount of strobe light and the main subject is not sufficiently exposed, when the lab machine prints, it appears as much as possible. Print things. SOLUTION: A recording device (5) for writing to a recording portion provided in a film, a distance measuring device (9) for measuring a distance to a subject, a flash device, and a control device for controlling a recording operation of the recording device. When the distance measurement result of the distance measuring device is farther than a predetermined distance, the control device is provided with (1) and the fact that the flash device does not emit light even when shooting is performed with the flash device emitting light. Records on film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having an information recording device for recording photographing information on a film.

[0002]

2. Description of the Related Art Recording information of a camera on a film,
A system is known in which a lab machine uses recorded information when printing. In such a system, you should record the information that the camera has taken a flash on the film, and when the lab machine prints this information, if the film density around the screen is thin and the film density in the center of the screen is high However, it can be considered that the main subject can be determined to be the central portion and can be appropriately exposed to the density of the central portion to produce an appropriate print.

[0003]

When the distance to the subject is long with respect to the amount of strobe light and the main subject is not sufficiently exposed, it is determined that the lab machine is shooting at night on the basis of the information that the strobe shooting has been performed. Then, if it is determined that a print with a dark depiction is acceptable and the exposure is performed, there is a risk that the print will show almost nothing.

The present invention has been made in view of the above problems, and a lab machine prints even if the film density is underexposed such that the distance to the subject is long with respect to the amount of strobe light and the main subject is not sufficiently exposed. The goal is to print as much of the image as you can.

[0005]

In order to achieve this object, the camera of the present invention comprises a recording device (5) for writing to a recording portion provided on a film and a distance measuring device for measuring a distance to an object. (9), a flash device, and a control device (1) for controlling the recording operation of the recording device. When the distance measurement result by the distance measuring device is longer than a predetermined distance, the flash device emits light. In this case, the control device records the fact that the flash device does not emit light on the film.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram showing an embodiment of a camera according to the present invention.

In FIG. 1, reference numeral 1 is a CPU. 2
Is a divided sensor element that divides the photographic screen into five and measures the subject brightness in each divided area. A photometric circuit 3 calculates a brightness value based on an output signal from the divided sensor element 2 and calculates an average subject brightness from weighting according to each divided region. 4 is a magnetic head, which is a photographic film 4a
Record the information in. Reference numeral 5 is a magnetic writing circuit for writing to the magnetic head 4. Reference numeral 6 denotes a cartridge data reading circuit formed on a film cartridge (not shown) for reading information on the sensitivity, the number of shots, and the type of film. A cartridge data storage circuit 7 stores the data read by the cartridge data reading circuit 6. Reference numeral 8 denotes a focusing lens control device that extends the focusing lens based on information from the distance measuring device 9. Reference numeral 9 is a distance measuring device for measuring the distance to the subject. The distance measuring device 9 may be a device that detects the focus lens position from the defocus amount of the subject. Reference numeral 10 denotes a strobe light emitting device (flash device) having a light emitting source for performing strobe auxiliary light emission and a control circuit. Reference numeral 11 is an FM calculation circuit that determines the aperture during stroboscopic photography based on distance information from the distance measuring device 9 and sensitivity information from the data storage circuit 7. In the case of a dimming control camera, a TTL dimming circuit may be used.

Reference numeral 12 is a detection device for detecting a frame of the photographic film 4a. Reference numeral 13 is a display device for displaying the number of frames for photographing based on the detection signal from the frame position detection circuit 12. Reference numeral 14 denotes a motor control circuit for winding and rewinding the photographic film when reading the cartridge information. Reference numeral 15 denotes an aperture control device that controls the aperture to a determined aperture value when the taking lens is exposed and when the FM is used. Reference numeral 16 denotes an exposure control device that controls the shutter based on the exposure value from the photometric circuit 3. In the case of the triangular program lens shutter, the exposure control device 16 is a control device integrated with the aperture control device 15. 17
Is a zoom drive device for driving a zoom lens. 1
Reference numeral 8 indicates the open F value of the zoom lens in the storage device based on a detection signal from a zoom lens position detecting means (not shown).
It is an open F value reading device for reading a value, and the read open F value is transmitted to the CPU 1.

2 to 6 are flowcharts showing the operation of the CPU 1. In FIG. 2, when the program starts (step S1), first, in step S2, the process waits for the cartridge to be loaded in the camera. When the cartridge is loaded, in step S3 the loading of the cartridge is detected by a switch (not shown) in step S3, and the film feeding motor 14
Reverse a. In step S4, the feeding motor 1
When 4a is reversed, the bar code disk formed in the cartridge (not shown) rotates and the content is read and stored by the photo reflector (not shown). When the reading is completed in step S5, the feeding motor 14a is rotated in the normal direction. In step S6, the film take-up spool is rotated by a clutch mechanism (not shown), and the film is wound up to the first frame by the frame position detection circuit 12. After winding up to the first frame, the feeding motor 14a is stopped in step S7.

In step S8, the shutter release half-press switch SW1 (FIG. 1) is waited for on. After waiting for the half-push switch SW1 to be turned on, the arrival limit distance of the strobe light is calculated (Em calculation) in step S9. Step S
At 10, photometric processing is performed. In step S11, the seismic intensity value is calculated based on the exposure value from the photometric circuit 3. In step S12, the distance measuring device 9 measures the distance to the subject. In step S13, if the distance measurement result is farther than the reaching limit distance obtained in step S9, the process proceeds to step S15, and if it is less than the reaching limit distance, the process proceeds to step S14.

In step S14, the flag F1 is set to 1
Set to. In step S15, the aperture diameter at the time of flash photography is calculated. In step S16, the photographing lens is driven to the in-focus position by means (not shown) based on the subject distance information from the distance measuring device 9. In step S17, it is determined whether the shutter release fully pressing switch SW2 is on or off. If the switch SW2 is off, it is determined in step S18 whether the half-press switch SW1 is on or off. If the switch SW1 is on, step S1
7, when the switch SW1 is off, step S1
Move to 9. In step S19, the focusing lens is returned to the initial position. However, in the case of TTL distance measurement, it may not be returned. In step S20, the flag F1
To 0.

In step S21 (FIG. 3), it is determined whether or not the strobe mode (shooting with strobe auxiliary light) is set in the photometric processing. If it is not the strobe mode, the aperture is set according to the exposure calculation program value in step S23. Step S24
At, the shutter is opened and closed according to the exposure calculation program value. In step S25, the diaphragm is opened.
However, in the case of the shutter that also serves as the diaphragm, steps S23 and S
24 and S25 proceed simultaneously during the opening / closing operation.

In step S22, strobe light emission processing is performed. In step S26, the focusing lens is returned to the initial position. In step S27, it is determined whether the shooting frame is the final frame. If it is the last frame, the flag F2 is set to 1 and the process proceeds to step S28. If it is not the final frame, step S28
At, the film feeding motor 14a is rotated in the forward direction to start winding the film. In step S29, information such as the exposure value at the time of photographing is started to be recorded on the film 4a in the form of magnetic information via the magnetic head. In step S30,
The date information is written on the film 4a. In step S31, it is determined whether the flash mode is set. If it is the strobe mode, the process proceeds to step S32. If it is not the strobe mode, the process proceeds to step S34.

In step S32, if the flag F1 is 1, the process proceeds to step S33, and if it is not 1, step S34
Go ahead. In step S33, the information on the flash photography is recorded. In step S34, when recording is completed, it is determined whether or not the number of frames has been sent by one frame. When one frame has been fed, the film feeding motor 14a is stopped in step S34-1. Step S36
In FIG. 4, it is determined whether the flag F2 is 1 and 1
If so, proceed to step S37. If it is not 1 (not the last frame), the process proceeds to step S45. Step S4
At 5, the display counter is incremented by 1. In step S46, the flags F1 and F2 are set to 0, and the process returns to step S8 (FIG. 2).

In step S37, the film feeding motor 14a is reversely rotated to start rewinding. Step S
At 38, the rewinding frame waits for one frame to be rewound. In step S39, the number of displayed frame pieces is counted down. When the number of frame pieces is not 0 in step S40, the process returns to step S38. When the number of frame pieces becomes 0, the process proceeds to step S41, and empty blinking display is performed. In step S42, the process waits until the rewinding is completed. In step S43, when the rewinding is completed, the feeding motor 14a is stopped. In step S44, the flags F1 and F2 are set to 0.

FIG. 5 is a flow chart for explaining the operation of the flash light emission process. In step S51, if the charging voltage is equal to or higher than the predetermined voltage Dv, the process proceeds to step S52, and if it is equal to or lower than Dv, the process proceeds to step S57. In step S57, the flag F1 is set to 1, and the process proceeds to step S52.

In step S52, the aperture is set according to the FM calculation value. In the case of the photometric method, the aperture value is set according to a built-in program (not shown). Step S5
At 3, the process waits until the aperture value is set. Step S
At 54, the shutter is opened. However, in the case of a shutter that also serves as an aperture, it opens at the same time as the start of aperture setting. In step S55, strobe light is emitted with the shutter fully open.
However, in the case of a shutter that also serves as an aperture, flash emission is performed at the same time when the aperture setting is completed. In step S56, the shutter is closed according to the exposure calculation program value. In step S58, the process returns to the main routine.

FIG. 6 is a flow chart for explaining the Em calculation process for calculating the shooting distance where the strobe light does not reach (the exposure is not proper). In step S62, the film sensitivity information read and stored in step S4 is read. In step S63, the F value is read from the open F value reading device 18 of the photographing zoom lens. In step S64, the flash guide number (GN) is set to C.
It is read from a storage device (not shown) in PU1. When the GN value changes according to the zoom operation, the GN set according to the F value read from the open F value reading device 18 is set.
Is read from the storage device in the CPU 1. Step S65
In, the distance Em is calculated from the following equation. Step S6
At 6, the process returns to the main routine.

Em = {GN × 2 ^{(S-5) / 2} } / F (1)

In the embodiment, the flash device does not emit light even when shooting is performed with the flash device emitting light when the distance measurement result of the distance measuring device to the object is longer than the predetermined distance. The control device records the film on the film, but when the charge storage voltage of the flash device is lower than a predetermined value, or when the reflected light from the subject is dimmed, the flash device stops the light emission of the flash device. The present invention can be applied even when the dimming amount is lower than a predetermined value.

[0022]

As described above, according to the camera of the present invention, when the result of distance measurement by the distance measuring device is longer than the predetermined distance, even when shooting is performed by the flash device,
Since the controller records on the film that the flash unit is not emitting light, the distance to the subject is long relative to the amount of strobe light and the main subject is not sufficiently exposed. When the machine prints, it is possible to print what is shown in the image as much as possible.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of a camera according to the present invention.

FIG. 2 is a flowchart showing an embodiment of a camera according to the present invention.

FIG. 3 is a flowchart showing an embodiment of a camera according to the present invention.

FIG. 4 is a flowchart showing an embodiment of a camera according to the present invention.

FIG. 5 is a flowchart showing an embodiment of a camera according to the present invention.

FIG. 6 is a flowchart showing an embodiment of a camera according to the present invention.

[Explanation of symbols]

 1 CPU 2 Split Sensor Element 3 Photometric Circuit 4 Magnetic Head 4a Photographic Film 5 Magnetic Writing Circuit 6 Cartridge Data Reading Circuit 7 Data Storage Circuit 9 Distance Measuring Device 12 Frame Position Detection Circuit 14a Film Feed Motor 15 Aperture Control Device 16 Exposure Control Device 18 Open F value reading device SW1 switch SW2 switch

Claims (5)

[Claims] 1. A recording device for writing to a recording portion provided on a film, a distance measuring device for measuring a distance to a subject, a flash device, and a control device for controlling a recording operation of the recording device. When the result of distance measurement by the distance measuring device is farther than a predetermined distance, the control device indicates that the flash device does not emit light even when shooting is performed with the flash device emitting light. A camera characterized by recording in. 2. The camera according to claim 1, wherein the predetermined distance is changed according to film sensitivity. 3. The camera according to claim 1, further comprising a zoom lens having a variable open F value, wherein the predetermined distance is changed according to a zoom operation of the zoom lens. 4. A recording device for writing to a recording portion provided in a film, a flash device, an accumulated charge detection means for detecting an accumulated charge amount of the flash device, and a control device for controlling a recording operation of the recording device. When the measurement result by the accumulated charge detection means is lower than a predetermined value, the fact that the flash device does not emit light is indicated, even when the flash device emits light. A camera in which the control device records on the film. 5. A recording device for writing to a recording portion provided in a film, a flash device, and a control device for stopping the light emission of the flash device when the reflected light from a subject is adjusted to a proper exposure amount. An optical device and a control device for controlling the recording operation of the recording device are provided, and when the dimming amount of the dimming device is lower than a predetermined value, the flash device emits light for photographing. Even in that case, the control device records on the film that the flash device does not emit light.