Abstract: A battery housing structure is provided for a camera having a battery chamber for housing a battery. The battery housing structure comprises a lid for opening and closing an opening of the battery chamber and an operating member that is movably supported by the lid. Various embodiments are disclosed that provide a battery housing structure in which the operating member can be provided in a narrow space, and in which the battery chamber can be easily opened and closed.

Abstract: A clamp structure clamps superimposed circuit boards to a support plate portion of a rangefinder case in a still camera. The clamp structure includes first and second support arms spaced in confronting relation from each other by a distance greater than the thicknesses of the superimposed circuit boards and the support plate portion. The first and second support arms are disposed in sandwiching relation to the circuit boards and the support plate portion. A rod is inserted in a space defined between the second support arm and the lowermost circuit board which faces the second support arm while the first support arm is being held against the uppermost circuit board which faces the first support arm.

Abstract: A photometry device having a block body, constructed as a single body, on which all of the elements of a photometry system are mounted. The photometry system includes a condenser lens, a stop plate having a stop and a photosensor. An output characteristic of the photo sensor is determined by a pre-set resistance provided in a circuit board, and is adjusted during the process of assembling the block body. The photo sensor does not require a re-adjustment after the block body is assembled into a camera.

Abstract: A front conversion adapter which can be attached to the front face of a lens shutter type of camera having a zoom lens and a finder optical system, wherein a lens frame of the zoom lens moves in accordance with the zooming operation. The front conversion adapter has an adapter body which can be attached to a camera body, and a conversion optical system which is located in front of the zoom lens and which moves in the optical axis direction thereof to change the focal length of the zoom lens. The conversion optical system is supported by an adapter lens frame so as to move in the optical axis direction in association with movement of the lens frame of the zoom lens and in accordance with zooming operation.

Abstract: A camera viewfinder which includes a device for displaying data, such as shutter speed and aperture value. A liquid crystal display and associated illuminating systems are provided for the display device. The illuminating system includes an illuminating lamp and a diffusion plate for diffusing light from the lamp. The diffusion plate has a groove or hole at its center for accommodating the lamp and a flat surface facing the liquid crystal display. The surface of the diffusion plate opposite the flat surface has sloping sides which slope downward from the center of the diffusion plate.

Abstract: In a caseless camera, a cover plate having a contact member at the rear side thereof is slidably mounted at the front side of a camera body between its closing and opening positions. An electric flash mounted inside the camera body traversely movably between its restoring and operating positions is provided with an inclined step at the front side thereof. The contact member of the cover plate contacts and downwardly push the inclined step of the electric flash so as to return the electric flash to its restoring position, when the electric flash is in its operating position, upon the sliding movement of the cover plate from its opening positions to its closing position.

Abstract: A focusing screen mounting device for a camera which has a high stability and a minimum number of components to reduce the number of steps of adjustment needed during assembly. The focusing screen mounting device includes a focusing screen holder which is made of a flexible material and which is arched towards the focusing screen so as to urge the focusing screen towards the penta-prism of the camera. The focusing screen holder is hingedly mounted along a rear edge and is provided with upwardly-extending protrusions for securing the focusing screen.

Abstract: A camera having an interchangeable finder with rails or rail grooves that is detachably mounted on a camera body by being moved back and forth. The camera body has rail grooves (or rails) engaging the interchangeable finder. A viscoelastic member and a resin member or a metal member are secured in combination to the interchangeable finder of the drawing type or the camera body. When the interchangeable finder of drawing type is mounted on the body, the resin member or the metal member abuts against the camera body or the interchangeable finder of drawing type to thereby establish an environmental seal.

Abstract: The eyepiece in an interchangeable finder is made axially adjustable by mounting it in a holder which, in turn, is slidably mounted within the finder. In the preferred embodiment, sliding movement of the eyepiece holder is accomplished through a rack and pinion.