Abstract: The invention relates to a mirror mechanism for a monocular reflex camera with a laminated focal plane shutter, in which at least the opening blades of the shutter are automatically guided back into their initial positions by a spring-operated guidance member after the exposing procedure.To simplify construction of the opening blades return mechanism there is provided an arm on the shutter return mechanism which is capable of being coupled to the swivel lever for the viewfinder mirror when the opening blades move back. The swivel lever can be moved back against the action of a spring and held by a catch.

Abstract: The lamellar focal-plane shutter for monocular mirror reflex cameras comprises a swivelling viewfinder mirror and shutter blades returning automatically to their starting positions after each exposure operation. The intrinsically stationary end of an opening spring which is connected to an opening lever is fastened to a first tensioning plate and the intrinsically stationary end of a closing spring, which is connected to a closing lever, is fastened to a second tensioning plate. Both tensioning plates are interconnected by a coupling rod which is tensioned against the action of a return spring upon the winding and cocking action of the camera. The rod is held in this tensioned position by a detent lever which can be actuated for the release of the coupling rod by means of a releasing arm which is moved back to its start position when the viewfinder mirror returns to the observing position.