Leica Camera Ag

André De Winter

An objective adjusting device has a stationary housing, an adjusting ring with an internal thread and a tube, with an external thread, that is guided rectilinearly in an axial direction and carries optical active elements. The adjusting ring is rotatably supported in the housing, and the tube has at least one axially parallel opening with mutually parallel sliding surfaces in which a guide element connected to the housing engages. The guide element is designed as a lug with a sliding head which is adapted in width to the opening and is provided with a slot, of settable slot width, running in a radial direction.

Rectilinear guide which can be set without play

A lens mount for viewfinder cameras, having a distance setting ring and, coupled thereto, an apparatus for transmitting the set distance to the setting lever of a measuring viewfinder arranged on the camera side. The apparatus contains an outer worm connected to the distance setting ring, an inner worm, inserted in said outer worm and guided rectilinearly in the lens mount, and a cam ring rotatably supported in the inner worm and with an axial cam pointing to the camera on the end face, is characterized in that the cam ring is locked into an annular groove in the inner wall of the inner worm and is provided with preferably two pins which point radially outward over the edge of the inner worm at the end of the camera side, and which engage in each case in an axial groove in the outer worm.

Lens mount for viewfinder cameras

An interchangeable objective for integrated rangefinder cameras is described, having a mechanically mounted objective head () and a spiral () with a bayonet fitting (), the spiral () containing a spiral mechanism () for driving an objective head carrier () that is guided axially in a straight line and formed as a cylindrical ring, and a focusing ring () which is connected to the spiral mechanism () and can be actuated from outside, and is characterized in that, for the purpose of inserting a rear mount part () of the objective head () into the objective head carrier (), the focusing ring () can be released from the spiral mechanism () by removing radially oriented connecting means () and can be pushed onto a front mount part () of the objective head (), a threaded ring () is rotatably mounted on a central mount part () of the objective head (), and the threaded ring () can be screwed () onto the objective head carrier () in order to connect the objective head () to the latter.

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Leun, Germany

André De Winter