Abstract:
A system for setting photographing conditions in which a switch means is engaged with a respective mechanism for setting various photographing informations and converts set values into signs or symbols, and digital information are obtained by selective change-over of the switch means in order to introduce digitalized photographing informations to an operation device.
Abstract:
According to the present invention a switching means is connected with the driving means of the electrical driving device for the film mechanism in a camera. The film mechanism carries out at least film winding up and shutter driving one after another. The invention includes a means to control the duty cycle of said switching means and means to drive said driving means with a voltage regulated within a proper range so as to carry out the drive control of the film mechanism.
Abstract:
In a device for continuously driving a camera wherein a charge mechanism for film advance and shutter charge may be intermittently driven through a clutch mechanism and a shutter release mechanism may be driven from an electric motor during the inoperative period of the charge mechanism to thereby effect a sequence of shots during the revolutions of the motor, an adjustable constant voltage circuit is provided for energizing the electric motor so that the interval between successive shots of the camera may be adjusted by adjusting the voltage of the circuit.
Abstract:
In a single-lens reflex camera having an electronic shutter of the fully-open aperture TTL metering type, an exposure control system includes a first exposure operating circuit for determining an aperture value in accordance with the setting of exposure time to control the exposure with priority given to shutter speed, an automatic aperture mechanism for presetting an aperture value, and a second exposure operating circuit for determining an exposure time in accordance with the preset aperture value and with the quantity of light from an object to be photographed.
Abstract:
In the automatic camera flash circuit disclosed a start switch actuates a time constant circuit. A first semiconductor circuit, controlled by the time constant circuit, operates an electromagnet. A power source and a second semiconductor circuit actuates a flash device. The flash device is controlled by the time constant circuit through the second semiconductor circuit.
Abstract:
In the device disclosed, a shutter actuating disc, after it has rotated through an almost full cycle, releases a coaxial shutter cocking disc which is connected to a rotating film-winding mechanism, and sets a pawl that stops the actuating disc. A shutter release, when unactuated, sets a release pawl that holds back the actuating disc. When the cocking disc is fully rotated it sets the stop pawl back so only the release pawl holds the actuator disc. A spring between the disc causes the rotating cocking disc to bias the actuating disc against the pawls. Pressing the shutter release pulls back the release pawl and allows the actuator disc to rotate, actuate the shutter, and release the cocking disc until it is stopped by the stop pawl. The cocking disc then rotates to wind the spring, and after a revolution sets back the stop pawl. If the shutter release is still pressed the stop pawl allows the actuator to start rotating for a succeeding picture. According to another embodiment of the invention, electrical means substitute for the release pawl and serve, in response to rotation of the actuating disc, to operate a motor that rotates the cocking disc.
Abstract:
A shutter device with a synchronizer contact which comprises a shifting member which shifts from its standard position with a constant shutter opening rate, and a blade for determining a blade opening in correspondence to the amount of the shifting movement; said synchronizer contact being closed by the shifting member at the time when the blade opening reaches a value determined for an appropriate artificial exposure.
Abstract:
A photographing system for use with a flash device comprising a flash-auto mechanism (FA mechanism) including an electronic timer circuit for exposure control a power capacitor for storing charges, a power supply circuit for charging said power capacitor, a control circuit for detecting said charges stored in said power capacitor and for adjusting said flash-auto mechanism in accordance with said charge across said power capacitor, and a discharge circuit connected across said capacitor and including a discharge lamp for triggering said discharge lamp to operate said system.
Abstract:
In a single-lens reflex camera provided with an electronic shutter and a TTL metering lens having a preset aperture, an exposure control system includes means for automatically determining the lens aperture in accordance with a preset shutter speed and the brightness of an object to be photographed. An auxiliary aperture disposed in front of a light receiving element and operatively associated with the lens aperture preset member, is provided so that the electronic shutter is controlled by the light passed through the auxiliary aperture at the preset speed if a valid choice was made, and at a speed as near that as consistent with good exposure in other cases.
Abstract:
An electronic exposure controlling apparatus for use in cameras having a capacitor to be charged through a first resistive circuit from a voltage source in association with the depression of a shutter release. A switching circuit effects switching action when the charge of the capacitor comes to a predetermined value. A shutter of a shutter mechanism is opened in response to the switching action of the switching circuit and a switch connects the capacitor to a second resistive circuit, including a photoconductive element, in synchronism with the opening of the shutter so as to discharge the capacitor. The switching circuit actuates the closing of the shutter when the capacitor discharges to a predetermined value.