Abstract: A light measuring device in which the field of a photometric system is divided into a plurality of areas, and the outputs of these areas are computed based on the one of various formulae which is selected depending on the relative size of the subject image to the total field as the focal length of a photographic lens varies, to obtain an exposure value.

Abstract: A motor driven camera includes a mirror drive mechanism of swinging a movable mirror between a finder viewing position and an exposure retracted position, a shutter charge mechanism for performing charge driving and charge releasing of a shutter, a first film drive mechanism for driving film in a direction reverse to the feeding direction for each shot, a first motor serving as a drive source for driving the mirror drive mechanism, the shutter charge mechanism and the first film drive mechanism, and a clutch mechanism having output transmission systems being changed over in response to a change of the direction of rotation of an output of the first motor, one of the output transmission systems being connected to the mirror drive mechanism and the shutter charge mechanism, and another of the output transmission systems being connected to the first film drive mechanism.

Abstract: A motor driven camera having a mirror box in which a movable mirror supported to be pivotally movable between a finder-viewing position and an exposure retracted position is assembled, includes a mirror drive mechanism for driving the swing motion of the movable mirror, a shutter unit, a shutter charge mechanism for driving the charging of the shutter unit, and at least one motor constituting the drive source of the mirror drive mechanism and the shutter charge mechanism, wherein the mirror drive mechanism, the shutter unit, the shutter charge mechanism and the motor are assembled in the mirror box.

Abstract: A camera having an auto-focus device includes a circuit for compensating the aperture value in response to changes of the zoom lens. A focus detection circuit detects the focus condition of first and second objects in the field of view. An aperture calculation circuit determines a signal corresponding to a difference between the in-focus position of the lens to the first object and the in-focus position of the lens to the second object. The aperture value is determined when both objects fall within the depth of field on the basis of the difference signal. The compensation circuit compensates the aperture value in response to the change of the zoom lens. The compensated aperture value is determined so that the first and second objects are both within the depth of field of the changed zoom state.

Abstract: A motor driven camera includes a charge mechanism for charging at least a shutter a first motor serving as a drive source for driving the charge mechanism, a film transportation mechanism for feeding film to make exposure of the next frame thereof, a second motor serving as a drive source for driving the film transportation mechanism, a first motor control circuit for driving the first and the second motors in parallelism to make ready to shoot the next frame after completion of exposure, operation detecting means for detecting an operating state of at least one of the first and the second motors, and a second motor control circuit for forcibly stopping one of the first and the second motors in response to output information produced by the operation detecting means representing that the operating state detected by the operation detecting means is not a predetermined state, the second motor control circuit driving again the forcibly stopped motor after completion of an operation of another motor.

Abstract: A display device for use in a photographic camera has a light receiving type display arrangement including a negative type, electro-optically photosensitive panel having a plurality of first segments and a second segment. The first segments comprise groups of display segments each displaying a character. The configuration of the character is varied by controlling the energization of the first segments. The second segment comprises a window-type segment which can be switched between the states of transmitting and shielding light by controlling the energization of the second segment. The display device further includes illuminating members for illuminating the areas of the first and second segments. The illuminating member has a light emitting arrangement for conducting the light from the illuminating member into the second segment.

Abstract: A lens drive device for a camera drives a lens by a motor to a position preset by an operator. The lens position is stored in a memory. When the lens is to be moved to the stored position while the lens is moved by an auto-focus device to an in-focus position, the lens is instantly moved by the motor to the stored position based on the data stored in the memory.

Abstract: A light measuring device having an automatic focus control mechanism including one-shot type focus control means for effecting focus control in one-shot type focus control mode and servo type focus control means for effecting focus control in servo type focus control mode, in which a field to be photographed is divided into a plurality of areas which are subjected to light-measurement, and a control circuit is provided to vary weighting for light-measurement of these divided areas according to the selection of the above-mentioned focus control mode effected by said automatic focus control mechanism.

Abstract: In a camera having an electronic finder for converting an object image formed by an image forming optical system of the camera to electrical signals and performing a display in response to said signals, apparatus is provided for supporting the electronic finder in such a way as to enable the electronic finder to be observed from either the front or the rear of the camera, and a control circuit is provided for changing the display state of the electronic finder in response to the support state of the supporting apparatus.

Abstract: A data retention apparatus which protects against loss of data from the data processing circuits of a camera during replacement of the camera battery. A non-volatile memory, such as an E.sup.2 PROM, is arranged to receive data from the data processing circuits when the camera's battery cover is opened. An operating member holds the camera battery against it s contacts when the cover is opened so that data transfer can take place. Thereafter the operating member can be operated to release the battery.

Abstract: A motor driven camera having a film windup device for winding up film by an electric motor for windup as a drive source, comprises a first windup transmission system for rotating a spool by the motor for windup as the drive source, the first windup transmission system being driven through a first planetary clutch arranged to be driven by the rotation of the motor in one direction, a second windup transmission system for rotating a sprocket by the motor for windup as the drive source, the second windup transmission system being driven through a second planetary clutch arranged to be released from the connection by rotation of the motor in the other direction, and a holder for holding the second planetary clutch in the released state from that connection.

Abstract: The present invention relates to a so-called AE lock device for camera, and more particularly to such device in which as the object brightness is changing rapidly, when the stored value of brightness at the time of the AE lock is later found to give an improper exposure value, either photographer is warned of this, or the AE lock mode is cancelled automatically.

Abstract: A film data reading device is provided with contacts for reading a data relative to a film from a data code part provided on a film cartridge. The contacts are arranged to be protrusible into and retractable from a cartridge loading chamber and to be retracted from the cartridge chamber when loading the chamber with the film cartridge.

Abstract: In the disclosed camera, a reading device in the camera body's cartridge chamber reads electrically sensible data from a cartridge by determining the existence of data at one location of a data carrying surface on the cartridge and optically reading the remaining electrical data at the location of another data carrying surface. A positioning device positions a movable carrier member which holds optical detecting elements a specific distance form the other data carrying surface. Preferably the determination of the existence of data is performed by electrically contacting the one location of the data carrying surface.

Abstract: A multi-program control camera permitting selection of various exposure control modes is provided with a display arrangement to indicate, by pictographs and/or letters, the effects of a picture image obtainable by selection of the exposure control modes; and to automatically shift a selected exposure control mode to another mode when the effect of the picture image expected is difficult to obtain by the mode selected on the basis of at least one of the information values including the maximum aperture value of a lens, the minimum aperture value thereof, a fixed aperture, a focal length and the brightness of an object to be photographed.

Abstract: The disclosed invention is a multi-mode automatic exposure control camera which operates with selection of various image effects and enables even the beginner to make photographs with less susceptibility to failure. Upon consideration of different image effects, a plurality of combinations of shutter time and aperture value are provided for one mode, and in the usual mode selection, a more frequently used combination is made preferentially selectable to provide an improved operation.

Abstract: A camera of multi-mode versatility provided with an automatic focus control device operating with manual selection of servo and one-shot modes in combination with a coordinating system responsive to the setting of either the shutter speed priority or the shutter speed leading programmed automatic exposure mode for automatically operating the focus control device in the servo mode and responsive to setting either the aperture priority or the aperture leading programmed automatic exposure mode for operating the focus control device in the one-shot mode.

Abstract: A camera having a common electrical power source for the light metering circuit and either the range finding circuit or the lens drive motor. The output of the light metering circuit which occurs when the range finding circuit or the lens drive motor transits from unenergization to energization is prohibited from being used for automatically controlling exposure.

Abstract: Rotation control of a motor used as a drive source in a motor driven winding-up mechanism for a camera. By rotating the reversible motor in a forward direction, the winding-up transmission mechanism moves. When the film has been wound up by one frame, the reversible motor rotates in the opposite direction a minute angle.

Abstract: A focus detecting device for a camera adjusts its accuracy according to a selected one of available photographic modes, such as a panning mode using a shutter preference arrangement, a snap-shot mode using a normal combination of shutter time and an aperture value, or a portrait mode using an aperture preference arrangement.