JPS62289821A - Synchronous photographic device of camera - Google Patents

Abstract

PURPOSE:To execute simultaneous photographing by an easy operation without being restricted by a photographic condition, by executing a shutter operation of a sub-camera by an X contact signal of a main camera, and allowing a stroboscope to emit a light beam by an X contact signal of the sub-camera. CONSTITUTION:A film camera 1 being a main camera, a sub-camera 2, and a stroboscope 3 are coupled by cables 4, 5. In such a state, by a release operation of the camera 1, a shutter is opened, and by a timing of completion of the shutter, an X contact signal is generated. The camera 2 starts a shutter operation by the X contact signal of this camera 1, generates an X contact signal by a timing of completion and allows the stroboscope 3 to emit a light beam. Accordingly, both the camera 1 and the camera 2 are brought to exposure by a light emission of the stroboscope 3. Therefore, simultaneous photographing can be executed by an easy operation without being restricted by a place where brightness of an object to be photographed can be controlled.

Description

[Detailed description of the invention] 3. Detailed description of the invention 1. 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 brighter and focus both cameras, then make it darker, 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 provides both cameras with release signals with shifted timing. In this case, it is very troublesome to measure the amount of timing deviation because it is necessary to take pictures with both cameras in advance, measure the timing deviation of the shutter operation, and adjust it accordingly.

-Problems to be Solved by the Invention- The conventional simultaneous shooting using 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 simultaneous photographing operations using two cameras without being restricted by photographing conditions such as a photographing location.

Means for Solving a Problem - In order to solve the above-mentioned problem, the present invention provides a first camera that operates independently, and a shutter operation when an X contact signal of the first camera is applied. and a second camera for starting the process.

-Embodiment- Fig. 1 is a diagram showing the configuration of an apparatus showing an embodiment of the present invention. In addition to a film camera 1 serving as a main camera, a camera 2 serving as a secondary camera is provided, and a strobe 3 serving as an artificial lighting device is also provided. Film camera 1 and camera 2 are connected by cable 4, and camera 2 and strobe 3 are connected by cable 5. The cable 4 is used as a signal line for giving the X contact signal of the film camera 1 to the camera 2 as a shutter operation start signal, and the cable 5 is used as a signal line for giving the X contact signal of the camera 2 to the strobe 3 as a light emission start signal. be done. Here, camera 2
An input terminal for a strobe charge completion signal (flash preparation completion signal) is connected to the cable 4, and a changeover switch 6 allows the input signal to be used as the strobe charge completion signal or as a synchronization signal for synchronous shooting. The input terminal can be used for both synchronized photography and independent strobe photography.

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

The film camera 1 and camera 2 adjust focus, framing, and shutter speed, and operate the release button of the film camera 1. The film camera 1 opens its shutter lid by operating its release button, and as a result of this shutter opening, an X contact signal is generated at timing t1 when the shutter lid is completely opened, as shown in the second diagram. The camera 2 receives the X contact signal from the film camera 1 and starts its own shutter operation (as shown in the second diagram), and the timing t when the shutter is completely opened is
2 generates an X contact signal. Strobe 3 is the X of camera 2
It emits light at timing t2 when the contact signal is applied, and irradiates the subject with light.

Therefore, both film camera 1 and camera 2 have strobe lights 3.
The light is emitted simultaneously for simultaneous exposure, and synchronized photography is performed.

Here, as seen from the film camera 1, the exposure is delayed by the time T of the shutter operation of the camera 2, so the exposure time is set to be longer by that time T.
is 20Q+5sec ~30 for a normal SLR camera
Since it takes Q+5 seconds, the exposure time of the film camera 1 is set to about 1/2 second to 1 second.

Regarding the above point, in order to shorten the exposure time, the camera 2 should be mirrored up in advance during synchronous shooting, and the camera 2 should only open and close the shutter curtain when the X contact signal of the film camera 1 is given. It is realized by

In addition, 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 has to be opened and closed at high speed. In other words, a still video camera uses a mechanical shutter or an electronic shutter to control the exposure of a small photoelectric conversion section of the image sensor, reads out the signal for each pixel of the photoelectric conversion section, and transfers the signal to a magnetic disk such as a floppy disk. F L/- on the disk
The image signal is recorded as a field image signal or a field image signal, and the reproduced signal of this recorded image signal is displayed on a television or the like using a still video player, etc., but the area of the image sensor is 1/15 to 1/15 of the 35-layer film. 1/30
Therefore, by using a still video camera, the delay from receiving the X contact signal from the film camera 1 to opening the shutter and firing the strobe 3 is as short as a few milliseconds, and The exposure time of the camera 1 can be increased to about 1/60 to 1/125 seconds.

Also, if an electronic shutter is used as the shutter, the camera 2
Since the delay in the light emission of the strobe 3 due to the operation of the camera 1 can be reduced to 0, the exposure time of the camera 1 can be set without worrying about the camera 2 at all.

As mentioned above, when a still video camera is used as camera 2, in addition to making it possible to speed up the exposure time of the main camera, it also makes it possible to play back the shooting status immediately after shooting, and also allows the magnetic disk to It also has the advantage of being erasable and reusable, making running costs much lower than traditional instant cameras as secondary cameras.

In the embodiment, when photographing a bright subject such as when photographing outdoors during the day, synchronized photographing is performed in which the strobe light 3 is separated, so that both cameras are synchronized and photographed with the same exposure time.

Furthermore, although the timings of the exposure times of both cameras are shifted by T, this does not pose a problem except for high-speed shutters. If an electronic shutter is used for the camera 2, even high-speed shutters will not be abrupt.

Effects of the Invention - As is clear from the above description, the present invention provides synchronized shooting with two cameras, obtains the shutter operation of the secondary camera using the X contact signal of the primary camera, and controls the X contact of the secondary camera. Because the signal is used to obtain the light from the artificial lighting device, synchronized shooting between both cameras requires only the release operation of the main camera, and it is also possible to shoot in bright locations such as outdoors, making it easy to synchronize shooting operations and adjusting the shooting conditions. This has the effect of removing restrictions.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an apparatus showing an embodiment of the present invention, and FIG. 2 is a time chart for explaining the operation of FIG. 1. 1... Film camera, 2... Camera, 3... Strobe, 4.5... Cable, 6... Selector switch. Patent applicant Konishiroku Photo Industry Co., Ltd. Figure 2

Claims (1)

[Claims] 1) The camera is characterized by comprising a first camera that operates independently, and a second camera that starts shutter operation when the X contact signal of the first camera is applied. synchronized camera photography device. 2) A first camera that operates independently, a second camera that starts shutter operation when the X contact signal of the first camera is given, and a second camera that starts shutter operation when the X contact signal of the second camera is given. A synchronized photographing device for a camera, comprising: an artificial lighting device that emits light to irradiate a subject with light when the subject is photographed. 3) In claim 1 or 2, the second claim
The camera is a still video camera that uses a magnetic disk as a record carrier and allows the reproduction of the shooting state to be confirmed immediately after shooting. 4) Any one of claims 1, 2, and 3
In the second camera, the input terminal for receiving the light emission ready signal of the artificial lighting device is also used as the input terminal for the X contact signal from the first camera, and the input signal from the input terminal is connected to the changeover switch. A synchronized photographing device for a camera, characterized in that the camera is configured to switch and input signals separately. 5) In claim 1, in the second camera,
Use a flip-up mirror shutter, flip up the mirror, and then
A synchronized photographing device for a camera, characterized in that it waits for a contact signal.