Abstract: An automatic exposure control system permitting for a photographic camera to make an exposure in either of the shutter preselection automatic exposure range and the diaphragm preselection automatic exposure range is established by combination of an adapter unit with the camera. This adapter unit has a housing attachable to and detachable from the camera body, and includes an exposure operation and control circuit capable, upon preselection of an exposure time, of deriving an exposure value representing an effective exposure aperture, and, upon preselection of diaphragm value, of deriving an exposure value representing an exposure time. Responsive to the output of the adapter unit, the control device in the camera body controls operation of the shutter and diaphragm mechanisms thereof selectively in accordance with the exposure value derived from said exposure operation and control circuit.

Abstract: A range finder system to detect distance to an object by irradiating radiation toward an object, a distance to which is to be detected based on the principle of a base line range finder and receiving radiation being reflected by said object. It is particularly characterized by that a distance to an object is detected by irradiating a photoelectric conversion means with radiation and then comparing the signal outputted by said photoelectric conversion means with a prescribed reference signal.

Abstract: A device adapted for the purpose of enabling the use of presently available interchangeable photographic lenses in recently developed digitalized single lens reflex camera systems. This device is constructed in the form of an adaptor attachable to and detachable from the body of an interchangeable lens mount and capable, upon attachment to a conventional interchangeable lens, of providing information representing the full open F number of the interchangeable lens in the form of a coded digital signal. This signal is applied to a digitalized camera body associated therewith and provided, for example, with an inputting device adapted to receive the full open F number of the interchangeable lens as coded digital signal.

Abstract: A camera having an objective and visual or automatic focusing means for the objective. For assistance in bringing into sharpest focus an image of an object formed by the objective at the focal plane of the camera, there is provided a sharp focus detecting apparatus constructed in the form of an attachment unit attachable to and detachable from the camera and essentially comprising an optical system subsidiary to the objective, photoelectric means arranged upon receiving light coming from the object through the objective and subsidiary optical system for producing an electrical output signal proportional to the degree of sharpness of the image and oscillatory motion imparting means or scanning means associated with the photoelectric means for periodically varying the spatial relationship along the projection path between the photoelectric means and the subsidiary optical system.

Abstract: The present invention relates to an electrical driving circuit of a camera, particularly for preventing the misoperation of the release, whereby an interval timer for controlling a constant period of taking photographs is provided so as to carry out the release operation with the period controlled by the interval timer, while the operation state of the film winding up means of the camera is detected in such a manner that the release operation with the period of the interval timer is prohibited when the operation of the film winding up means has not been completed before the release operation with the period of the interval timer.

Abstract: In a roll film camera combined with a long length film magazine detachably mounted on the rear of the camera body, a film contained in the supply spool in the magazine is pulled past an exposure aperture by an intermittent-drive film advancing sprocket, while the take up spool in the magazine is driven by a separate driving means through a slip clutch to take up the film advanced from the sprocket. In one embodiment, this arrangement is provided with a film guiding means having buffering and braking functions mounted in the magazine and positioned between the sprocket and the take up spool so that when the sprocket is stopped while the separate driving means is driving the take up spool, the film is brought into frictional engagement with the surface of the film guiding means, whereby the film is braked and stabilized from residual movement during exposure.

Abstract: In a shutter-time-preference single lens reflex camera, in which the shutter time control is done with a predetermined shutter time, and diaphragm value is determined by an output information of a photometric means which measures a transmission light of a photographing lens and the above predetermined shutter time information, a camera actuating means provided in the camera body is put into operation through a magnet means provided in the camera body so that the aperture of the photographing is controlled in accordance with the above predetermined diaphragm value, and then the shutter time control is performed. Further, the camera includes an electric driving device and the driving of the electric driving device is controlled by a safety switch which, in turn, is controlled for its ON and OFF conditions by the completion of the exposure operations such as the operation of the shutter rear screen.

Abstract: A roll film camera of the type in which the film may be contained either in a magazine of normal film frame capacity removably mounted within the camera body or in a magazine of large film frame capacity detachably mounted on the rear of the camera body and in which the film transport and shutter tensioning mechanisms are operatively connected with each other by means of a single operating member. The film transport mechanism is provided with clutch means arranged between said single operating member and the driving means for the camera side takeup spool upon attachment of the large capacity film magazine to the camera body for disconnecting the takeup spool driving means from the single operating member.

Abstract: A camera which permits mounting of an electric film rewinding device and which is provided with a compartment for inserting a film containing magazine. In the wall of the compartment, there is an opening which is provided with means for mounting and dismounting a manual film rewinding device in addition to electric rewinding device mounting means arranged at the same opening, so that the electric or manual film rewinding device can be interchangeably mounted on and detached from the camera.

Abstract: A film rewinding device for a camera using a motor for rewinding film. Upon completion of film rewinding, the device automatically stops the film rewinding operation with detecting means disposed in the device to detect the completion of film rewinding. This is done by utilizing the difference between the load on the motor during the rewinding operation and the load at the completion of the rewinding operation.

Abstract: An operating apparatus provided with a rotary actuator which is driven by a motor to operate two actuating means for the shutter and film-winding mechanisms of an associated camera in timed relation. The motor is associated with a control circuit including a delay circuit responsive to the voltage of a power supply source connected to the motor, by which the initiation of the braking of the motor is controlled with respect to the termination of duration of the film winding operation so that when the motor is stopped from rotating, the rotary actuator assumes with high accuracy a predetermined operating position ready to operate the actuating means for the shutter mechanism regardless of variation of the voltage of the power supply source.

Abstract: A camera being so composed as having an electric driving device which has a means to detect completion signals for each of such actions as film wind up, shutter release, film rewinding preparation and film rewinding, wherein an electric motor is controlled by said signals to perform each action of film wind up, shutter release and film rewinding automatically and in time sequence.