Ernst Leitz Wetzlar Gmbh

Leica Camera Ag

Klaus Dieter Schaefer

Walter Bletz

A manually operable flashlight unit (,) having a foot part (,) fitting a finder shoe (,) on a camera (,), standard contacts (,) for chassis ground and (,) for flash release being arranged in the foot part (,), has the additional feature that a single further contact (,) is provided in the foot part (,) for a bidirectional information exchange between a circuit arrangement (,) contained in the flashlight unit (,) and a circuit arrangement (,) arranged in the camera (,).

Manually operable flashlight unit

Device for the corrective compensation of the altering aperture error formed by varying the aperture stop in reproducing systems of image recording apparatus, for instance photographic cameras. The reproducing system (2,3,4) comprises at least one optical member (3,22) affecting the aperture error and displaceably supported along the optical axis (23) of the reproducing system (2,3,4) for varying its relative position with respect to the other components (2,4) of the reproducing system. Setting means (17,28) are further provided which as a function of the variation in the aperture stop displace the optical member (3,22) by an extent corresponding to a corrective compensating nominal value along the optical axis (23) of the reproducing system (2,3,4).

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Braunfels, Germany

Klaus Dieter Schaefer