Abstract: A lens tube includes a standard member, a lens, a guide, and a pushing member. The standard member has a standard surface via which the standard member is to be mounted to a camera main body. The lens retainer retains at least one lens and is connected to the standard member movably along an optical axis of the at least one lens. The guide is provided facing the lens retainer in a radial direction of the at least one lens to guide the lens retainer along the optical axis. The pushing member pushes the lens retainer and the guide in opposite directions.

Abstract: A lens tube includes a standard member, a lens, a guide, and a pushing member. The standard member has a standard surface via which the standard member is to be mounted to a camera main body. The lens retainer retains at least one lens and is connected to the standard member movably along an optical axis of the at least one lens. The guide is provided facing the lens retainer in a radial direction of the at least one lens to guide the lens retainer along the optical axis. The pushing member pushes the lens retainer and the guide in opposite directions.

Abstract: An internal indicator of a viewfinder of a camera includes a viewfinder optical system which includes a focusing screen on which an object image is formed through a photographic optical system of the camera; at least one optical deflector that is positioned on or in the close vicinity of the focusing screen and is provided with at least one deflecting surface; and at least two light emitters for illuminating the optical deflector from the outside of the viewfinder optical system, which emit at least two light beams of different colors to be incident on the optical deflector.

Abstract: A film winding-rewinding apparatus for a camera comprises a driving pulley, a driven pulley and an endless belt, a rewinding fork, a winding spool, a selective transmission mechanism, and an idler. The driving pulley is attached to a reversible motor. The belt is tensioned around the driving pulley and the driven pulleys. The rewinding fork engages with the spool of a film cartridge and the film is wound by the winding spool. The transmission mechanism transmits drive power to the winding spool or the rewinding fork. When the motor is driven in the positive direction, the power is transmitted to the winding spool, and when it is driven in the negative direction, the power is transmitted to the rewinding fork. The idler is disposed in the vicinity of the belt and engages with a side of the belt which is loosened when the motor is driven in the negative direction.

Abstract: A film winding-rewinding apparatus for a camera comprises a driving pulley, a driven pulley and an endless belt, a rewinding fork, a winding spool, a selective transmission mechanism, and an idler. The driving pulley is attached to a reversible motor. The belt is tensioned around the driving pulley and the driven pulleys. The rewinding fork engages with the spool of a film cartridge and the film is wound by the winding spool. The transmission mechanism transmits drive power to the winding spool or the rewinding fork. When the motor is driven in the positive direction, the power is transmitted to the winding spool, and when it is driven in the negative direction, the power is transmitted to the rewinding fork. The idler is disposed in the vicinity of the belt and engages with a side of the belt which is loosened when the motor is driven in the negative direction.

Abstract: An exterior structure of a camera includes a first exterior member, a second exterior member and a cover member. The first exterior member is provided with a hole and an elastically deformable first finger. The second exterior member is provided with an elastically deformable second finger which can be engaged by the first finger of the first exterior member when the first and second exterior members are fitted together. The cover member is adapted to close the hole of the first exterior member and is provided with an elastically deformable third finger. The third finger is inserted into the hole of the first exterior member to engage with the edge of the hole.

Abstract: An optical unit for detecting a focus state. The optical unit has a focus detection zone restricting plate having a plurality of openings arranged in a first pattern in a vicinity of a predetermined focal plane on which an object image is formed. A sensor unit having a plurality of sensor sections is arranged in a second pattern, different to the first pattern, in a vicinity of an image reforming surface on which the object image is reformed. A plurality of mirrors deflect light transmitted through the plurality of openings arranged in the first pattern toward the plurality of sensor sections so as to have a direction identical to a direction of the second pattern of the plurality of sensor sections. The plurality of openings and the plurality of sensor sections are provided on a body of the optical unit. The plurality of mirrors are provided on members separate from the body of the optical unit.

Abstract: A focus detecting apparatus is provided including an image reforming optical system which splits a bundle of rays incident upon a detecting zone, which is provided on a predetermined focal surface, and reforms an image. The predetermined focal surface is substantially conjugate with a focal plane of a taking lens. The focus detecting apparatus further includes a line sensor which receives the reformed image, a detector which detects a focus state of the taking lens in accordance with an output of the line sensor, and a driver which moves the detecting zone on the predetermined focal surface.

Abstract: A contact pin subassembly including a plurality of contact pins, a contact pin holder which holds the contact pins and which is provided with a plurality of insulation ring portions in which the associated contact pins are slidably fitted, and springs which are held in the contact pin holder to bias the contact pins outward from the insulation ring portions. The contact pins subassembly may be combined into an assembly with a camera body, a lens, or some other subassembly of a device or instrument which requires contact pins, by mounting to the respective subassembly.

Abstract: A device for driving a lens including one or more lens groups displaceable in a direction along the optical axis by an electric drive unit. A memory unit is provided for storing a position of the lens group, and a controller for displacing one or more lens groups to the position stored in the memory unit by the electric drive unit.

Abstract: A camera having a mid-exposure zooming function, including a zoom motor driving a zoom lens, a trigger switch initiating mid-exposure zooming, and a mid-exposure zooming execution mechanism for initiating the driving of the zoom motor based on the operation of the trigger switch for initiating exposure.

Abstract: A retractable zoom-strobe device including a strobe housing, which is movable between a retracted position and a projected position, and a movable illuminating angle varying member, which is movably supported by the strobe housing, are provided. A powered strobe light emitter moving mechanism includes a strobe gear train, the gears of which are fixably mounted with respect to one another. The strobe gear train engages a swing arm, to which the strobe housing is attached, to move the strobe housing between the retracted position and the projected position. A powered illuminating angle varying member is also provided, which includes a zoom gear train which has a rack that moves the light emitting unit. Both the zoom gear train and the strobe gear train are powered by a single drive motor.

Abstract: A single lens reflex camera having a camera body, an interchangeable lens which is detachably mounted to the camera body, a focus adjusting mechanism provided in the interchangeable lens, a drive unit which is provided in the camera body to drive the focus adjusting mechanism in the interchangeable lens, and electrical contacts which are provided on the drive unit to transmit and receive electrical signals and/or the electrical power between the camera body and the interchangeable lens.

Abstract: A mounting apparatus for an interchangeable lens camera has a mount lock member which is provided on a body mount of a camera body and which can be disengageably engaged in a lock hole on the interchangeable lens mount. A mount lock releasing member moves in association with the mount lock member and retracts the mount lock member from the body mount when the mount lock member is pushed in. Contact members on the body mount and the lens mount are brought into contact with each other when the interchangeable lens is locked to the camera body, wherein the contact members provided on the camera body have contact pins which can retractably project from the body mount and which are continuously biased to project from the body mount. When the mount lock member is retracted from the body mount, the contact pins are also retracted from the body mount.