Abstract: A camera accessory is detachably engaged with a camera body including a camera body mount and body-side electric contact points. The camera accessory includes a camera accessory mount assuming a bayonet structure with a first tab, a second tab and a third tab. The camera accessory mount is configured to be inserted through the camera body mount without any of the first through third tabs hindered by three camera body-side tabs disposed at the camera body mount as long as the camera accessory mount is inserted at the camera body mount at a correct interlock phase. The camera accessory mount is configured such that insertion of the camera accessory mount through the camera body mount is disallowed at any phase other than the correct interlock phase with at least two tabs among the first through third tabs coming into contact with at least two of the camera body-side tabs.

Abstract: A camera system having a predetermined image circle, comprises: an interchangeable lens having a lens mount portion; and a camera body having an image sensor that is disposed within that image circle, and a body mount portion, wherein, when a radius of circular portion at a maximum internal diameter part of an opening portion of the lens mount portion is termed rM, a flange back that is a distance from the lens mount portion to a light reception surface of an image sensor in a state that the interchangeable lens and the camera body are mutually engaged is termed da, and the diameter of the image circle is termed D, the following equations are satisfied: 14.0 mm?2rM?40.0 mm??Conditional Expression #1 16.0 mm?da?20.0 mm??Conditional Expression #2 14.0 mm?D?20.0 mm??Conditional Expression #3.

Abstract: A camera accessory is equipped with an accessory mount assuming a bayonet structure with the first through the third tabs set over intervals along a circumferential direction and projecting from an inner side of the accessory toward an outer side. The camera accessory mount is structured so that insertion of the accessory mount is allowed as long as the accessory mount is inserted at a correct interlock phase without any of the first through the third tabs coming into contact with any of three camera body-side tabs, and that insertion of the accessory mount is disallowed if the accessory mount is positioned at a phase other than the correct interlock phase with at least two tabs coming into contact with at least two of the camera body-side tabs. The first through the third tabs extend along varying lengths along the circumferential direction. The first tab has the greatest length.

Abstract: A lock pin is inserted into a hole of a lens holding frame in order to lock a blur correction lens when blur correction is not executed. An optical axis of the blur correction lens and an optical axis of a photographic optical system match when the blur correction lens and the lens holding frame have fallen in the gravitational direction by their own weight and the lock pin and the hole have come into contact with each other.

Abstract: A lock pin is inserted into a hole of a lens holding frame in order to lock a blur correction lens when blur correction is not executed. An optical axis of the blur correction lens and an optical axis of a photographic optical system match when the blur correction lens and the lens holding frame have fallen in the gravitational direction by their own weight and the lock pin and the hole have come into contact with each other.

Abstract: A lock pin is inserted into a hole of a lens holding frame in order to lock a blur correction lens when blur correction is not executed. An optical axis of the blur correction lens and an optical axis of a photographic optical system match when the blur correction lens and the lens holding frame have fallen in the gravitational direction by their own weight and the lock pin and the hole have come into contact with each other.

Abstract: A lock pin is inserted into a hole of a lens holding frame in order to lock a blur correction lens when blur correction is not executed. An optical axis of the blur correction lens and an optical axis of a photographic optical system match when the blur correction lens and the lens holding frame have fallen in the gravitational direction by their own weight and the lock pin and the hole have come into contact with each other.

Abstract: A display apparatus in a camera for displaying photographic information using rotating elements. The display apparatus includes rotating pointers which rotate about display scales to display the photographic information. The display apparatus further includes a control unit which receives camera control information and in response to the control information, the control unit controls driving circuitry which causes the rotating display pointer to point to an index on the display scale representing the photographic information.

Abstract: A camera lens barrel includes a multiple thread screw mechanism that rotates a drive tube. Drive tube moves along an optical axis while rotating with respect to a fixed unit. Due to an action of a first cam during the rotation of the drive tube, a cam tube moves along the optical axis with respect to the drive tube. A first lens unit is integrated with the cam tube and rotates with respect to the cam tube. During rotation of the first lens unit, a second lens unit moves along the optical axis with respect to the cam tube due to an action of a second cam. The multiple thread screw mechanism inhibits movement of the drive tube along the optical axis until the drive tube is rotated to a predetermined angle of rotation.

Abstract: A camera capable of operating in a red-eye prevention mode. The camera has an electronic flash device which is activated by a drive circuit in synchronization with the exposure. The electronic flash device also serve as a pre-light-emission device capable of performing pre-light-emission for the purpose of preventing red-eye effect. When it is judged from the photographing condition that red-eye effect may occur, a controller activates the electronic flash device to effect a pre-light-emission for reducing the size of pupils of eyes of a person to be photographed, before the main flashing which is executed in synchronization with the exposure.

Abstract: This invention is applicable to a camera having a cartridge chamber into which a film cartridge is detachably insertable along its axis direction. The camera is equipped with a cartridge-load detection switch for outputting a load signal when the cartridge is loaded in the cartridge chamber, and outputting a non-load signal when the loaded cartridge is drawn out from the cartridge chamber by at least a predetermined amount. When the photographed cartridge is partially drawn out from the cartridge chamber and then reloaded into the cartridge chamber as it is, the output of the load signal is continued if the draw-out amount is below the predetermined amount, thereby preventing an erroneous judgment that a new cartridge is loaded into the cartridge chamber. Therefore, for example, the double exposure can be prevented.

Abstract: A camera having a multiple speed film driving mechanism that can accurately read film data on a film cartridge. The camera has a motor that drives a spool axis of the film cartridge, and a reading device that can read film data stored on a recording medium on the film cartridge. When the film cartridge is loaded into the camera, the reading device reads film data on the recording medium that is rotated together with the spool axis at a first speed. When film data reading is finished, the spool axis is rotated at a second speed to feed the film into the camera. A motor drive control circuit and CPU controls spool axis rotation at multiple speeds and directions.

Abstract: A camera includes a cartridge chamber in which a film cartridge is loaded, a spool chamber in which a take-up spool is mounted, and an aperture disposed between the cartridge the chamber and the spool chamber. The camera has a mechanism which feeds film out of the cartridge by rotating a spool shaft of the cartridge loaded in the cartridge chamber, and leads the film past the aperture to the take-up spool. The camera is further provided with a cartridge cover for concealing the cartridge chamber when it is closed and for exposing the cartridge chamber when it is open. A rear cover which is openably mounted on the rear side of the camera body, conceals the aperture and the spool chamber when it is closed and exposes the aperture and the spool chamber when it is open.

Abstract: A device (e.g., a camera) loaded with a film unit operates to detect a characteristic of the film unit, such as the state of an information part of the film unit. The detection result is used as a basis to control the performance of a further operation, such as a phototaking operation or a state-setting operation for the information part.

Abstract: A camera provided with a rear surface switch includes a pressure plate. The pressure plate maintains film in a flattened alignment within a film exposure region of the camera. An external cover encloses a rear of the pressure plate. A switch includes a movable operational member that protrudes from the cover. An electrical conductive member is attached to the rear of the pressure plate. An electrical signal is output in accordance with the movement of the operational member. The operational force resulting from the movement of the operational member is supported by the pressure plate.

Abstract: The picture frame switching mechanism according to the present invention includes: a plurality of picture frame definition members whose relative position in a plane perpendicular to an optical axis of an optical system is changed so as to switch picture frames; a drive section which drives a portion of the plurality of picture frame definition members; and a linked driving section which drives other portion of the picture frame definition members in linkage according to predetermined conditions with driving of the portion of the picture frame definition members.

Abstract: A camera capable of operating in a red-eye prevention mode. The camera has an electronic flash device which is activated by a drive circuit in synchronization with the exposure. The electronic flash device also serve as a pre-light-emission device capable of performing pre-light-emission for the purpose of preventing red-eye effect. When it is judged from the photographing condition that red-eye effect may occur, a controller activates the electronic flash device to effect a pre-light-emission for reducing the size of pupils of eyes of a person to be photographed, before the main flashing which is executed in synchronization with the exposure.

Abstract: A camera has a light shielding member surrounding an axially movable lens housing arranged to project through a circular opening in a camera housing. The light shielding member has an annular disc portion with an inner peripheral grooved surface frictionally engaging an outer cylindrical surface of the lens housing. The disc portion is positioned between a transverse inner surface of the camera housing cover and a surface of a helicoid member. At its outer periphery, the light shielding member has a generally cylindrical flange that projects axially between a longitudinal inner surface of the camera housing and the helicoid.

Abstract: A camera including a mount portion onto which a lens barrel housing a lens is mounted as movable in a direction of an optical axis thereof, a moving mechanism for moving the lens barrel in the direction of the optical axis, a limiter for setting a limit of movement of the lens barrel moved by the moving mechanism while the lens barrel is mounted on the mount portion, and a limit remover for removing the limit of movement set by the limiter when the lens barrel is dismounted from the mount portion. The camera further includes a signal transmission apparatus in which the lens barrel is mounted as movable in the direction of the optical axis thereon on the camera body. The signal transmission apparatus includes a light emitting element located on either one of the lens barrel and the camera body, and a light receiving element located on the other one of the lens barrel and the camera body, for receiving light from the light emitting element.

Abstract: The invention prevents film displacement without sacrificing the speedy photographic characteristics during the time of continuous photography. A part to prevent film displacement is moved to one of a contact position with a film and a removed position from the film. The part to prevent film displacement prevents a film displacement toward the direction of advancing film at the contact position. A driving device drives the part to prevent the film displacement. The photography control device carries out one time photography and the film advancement during the single mode setting and carries out the operation of photography and the film advancement alternately and repeatedly during the release operation. During the continuous photography mode setting, the device to control the film displacement controls the driving device and placed the part to prevent film displacement in the removed position only at the time of the film advancement after photography.