JPS62289822A - Synchronous photographic device for camera - Google Patents

Abstract

PURPOSE:To easily execute a simultaneous photographing without being restricted by a photographic condition, by providing a controller for starting the shutter operation of a subcamera by the release of a main camera, and executing a shutter closing operation by detecting a light emission of a stroboscope. CONSTITUTION:A cable release 1A and a stroboscope 2 are installed to a film camera 1 being a main camera, and a shutter controller 4 is installed to the subcamera. In such constitution, by the distributing signal of the release 1A by the release of the camera 1, the shutter opening operation of the camera 3 is started through the controller 4. Subsequently, the stroboscope 2 emits a light beam by the X contact signal of the camera 1, and when the controller 4 detects the end of the light emission, the closing operation of the camera 3 is executed. Accordingly, the cameras 1, 3 execute the shutter opening operation simultaneously, and are brought to a simultaneous exposure by a light emission of the stroboscope, therefore, simultaneous photographing can be executed by an easy operation without being restricted by a photographic condition.

Description

[Detailed description of the invention] 3. Detailed description of the invention − Industrial application field 1 The present invention relates to a synchronized photographing device using two cameras.

Background of the Invention - With cameras that use film as a record carrier (hereinafter referred to as film cameras), the quality of the shooting condition, including the subject, can only be determined by developing the film. There were some mistakes, like when I was filming. Conventionally, a method has been used to take important photographs by taking several shots of the same scene, but this method takes time and wastes film. Another conventional method is to take pictures with the main camera and an instant camera at the same time, and check the quality of the pictures from the instant camera's development, but simultaneous shooting operations for this purpose are difficult. Ta. for example,
As an example of a simultaneous shooting method, first make the subject bright and focus both cameras, then make the subject dark, set the shutters of both cameras to the bulb position, open the shutters by pressing the release button, fire the strobe, and then press the release button. There is a way to close the shutter by releasing the button.

Another method is to provide a device that gives both cameras release signals with shifted timings. In this case, it is very troublesome because it is necessary to measure the shutter operations of both cameras in advance and set the timing shift accordingly.

Problems to be Solved by the Invention - Conventional simultaneous shooting with two cameras has limitations such as making the shooting operation difficult or being limited to shooting locations where the brightness of the subject can be controlled; This poses problems due to limitations in shooting conditions, such as darkening the camera and setting the shutter to the bulb position, which requires a lot of effort, and making the subject quite dark just before shooting.

SUMMARY OF THE INVENTION An object of the present invention is to provide a synchronized photographing device that facilitates photographing operations using two cameras simultaneously without darkening the subject.

-Means for Solving the Problems- In order to solve the above-mentioned problems, the present invention provides a first camera that operates an artificial lighting device with its shutter open, and a second camera that takes pictures in synchronization with the first camera. camera, and the first camera.
and a controller that causes the second camera to perform a shutter opening operation when a release signal of the second camera is applied, and causes the second camera to perform a shutter closing operation when light emission from the artificial lighting device is detected. It is something.

One Embodiment - FIG. 1 is an apparatus configuration diagram showing one embodiment of the present invention. A film camera 1 serving as a main camera has a cable release IA, and a strobe 2 as an artificial lighting device is attached to a hot shoe. A camera 3, which is a slave camera to the film camera 1, has a shutter controller 4 attached to its hot shoe. This shutter controller 4 is coupled to a distribution signal line from the cable release IA so as to input an operation signal for the cable release IA. The shutter controller 4 immediately opens the shutter of the camera 3 in response to a distribution signal from the cable release IA, and generates a shutter opening/closing command to immediately close the shutter of the camera 3 when light emission from the strobe 2 is detected by the photodetector 4A. . The shutter opening/closing control at this time is
This is done by giving the command pulse to the camera 3 or by on-off control of the release signal.

The synchronous photographing operation with the above-described configuration will be described in detail below.

Film camera 1 adjusts focus, framing, and shutter speed; camera 3 sets focus, framing, and shutter speed to the valve position; and operates cable release IA; film camera 1 adjusts focus, framing, and shutter speed; The shutter opening operation is started as shown in the second diagram. At the same time as this time to, the shifter controller 4 is activated by the distribution signal of the cable release IA.
gives a shutter opening command to the camera 3, and the camera 3 starts the shutter opening operation. Therefore, film camera 1 and camera 3 start shutter opening operations at the same time.

When the shutter of the film camera 1 is opened, the shutter opening completion timing shown in the second diagram is 1. generates an X contact signal. As a result, the strobe 2 starts emitting light at time t1, and the film camera 1 and camera 3 are exposed by this light emission. When the shutter controller 4 detects that the strobe 2 has finished emitting light (time t2 in FIG. 2), the shutter controller 4 causes the camera 3 to start closing the shutter.

Therefore, synchronous photographing is performed in which both the film camera 1 and the camera 3 open their shutters at the same time, and the strobe 2 emits light for simultaneous exposure.

Here, the conditions under which film camera 1 and camera 3 can be exposed at the same time using the flash light from strobe 2 are as follows:
It is sufficient that the shutter of the camera 3 is completely opened from the start of the shutter opening operation to the completion of opening. In other words, it is sufficient that the shutter opening operation time T3 of the camera 3 is shorter than the shutter opening operation time Tl of the film camera 1.

Regarding the above-mentioned point, when the shutter operation of the camera 3 is slow, it is sufficient to raise the mirror of the camera 3 in advance and only open and close the shutter curtain using the opening command signal from the shutter controller 4.

Furthermore, if the camera 2 is a still video camera that uses a magnetic disc as a record carrier, the light-receiving area of the image sensor is small and the shutter is also small and fast, so there is no problem with the shutter opening time. , controlling the exposure of a small photoelectric conversion section of the image sensor using a mechanical shutter or an electronic shutter, reading out the signal of each pixel of the photoelectric conversion section and recording it on a magnetic disk such as a floppy disk as a frame image signal or a field image signal, A reproduced signal of this recorded image signal is displayed on a television or the like using a still video player or the like. From this, by using a still video camera, the time T3 from receiving a shutter opening command from the shutter controller 4 to completing shutter opening is as short as several milliseconds, and the exposure time of the film camera 1 is reduced to several milliseconds. By increasing the speed, you can perform synchronized shooting using simultaneous exposure.

As mentioned above, when using a still video camera as camera 3, in addition to synchronized shooting with a faster exposure time of the main camera, it is possible to play back the shooting status immediately after shooting, and the magnetic disk It can be used repeatedly by erasing and running, and has the advantage of significantly lower running costs than a conventional instant camera as a secondary camera.

In the embodiment, the shutter controller 4 may be built into the camera 3, or when the camera 3 is a still video camera, the processing function of the built-in shutter controller can be utilized.

- Effects of the Invention - As is clear from the above description, the present invention enables synchronized shooting by two cameras, by starting the shutter opening operation of the secondary camera with the release signal of the main camera, and by detecting the light emission of the artificial lighting device. Since the configuration is equipped with a shutter controller that closes the shutter, synchronized shooting of both cameras can be done by simply operating the release of the main camera, and moreover, it is possible to shoot with a single exposure using an artificial lighting device, making it possible to darken the subject. This has the effect of making it possible to obtain a reliable exposure state while eliminating the need for operations for synchronized photography and reducing restrictions on photography conditions.

[Brief explanation of drawings]

FIG. 1 shows an apparatus configuration M showing an embodiment of the present invention.
This is a 6-round IM chart showing the operation of 1-ton IM. 1... Film camera, IA... Cable release, 2... Strobe, 3... Camera, 4... Shutter controller.

Claims (1)

[Claims] 1) A first camera that operates an artificial lighting device with its shutter open, a second camera that takes pictures in synchronization with the first camera, and a release signal of the first camera that is and a controller that causes the second camera to perform a shutter opening operation when the second camera is detected and causes the shutter to close the shutter when light emission from the artificial lighting device is detected. Device. 2) The synchronized camera photographing device according to claim 1, wherein the second camera is a still video camera that uses a magnetic disk as a record carrier and can reproduce and confirm the photographing state immediately after photographing.