Device for setting exposure time and aperture size on cameras

Controllable shutter device for a camera for achieving extremely short selective exposure times at selectively sized diaphragm apertures when taking photographs with the camera, which comprises

• a lens shutter assembly having a lens passage for film exposure fitted with a reciprocating shutter sector system of sectors movable between a closed position and an open position for opening the lens passage and a reciprocating diaphragm segment system of segments movable between a closed position and a selectively sized open position for forming the diaphragm working aperture of the lens passage and for closing the lens passage, and
• control means for effecting initial diaphragm adjustment movement of the diaphragm segments at a low movement rate for formation of a selectively sized diaphragm working aperture before film exposure, then for effecting timed exposure shutter opening movement of the shutter sectors from the closed position to the open position for opening the lens passage for film exposure, and thereafter for effecting subsequent shutter closing movement of the diaphragm segments at a correspondingly high movement rate relative to the initial low movement rate thereof, at the end of a selectively timed interval following the timed opening movement of the shutter sectors and corresponding to the selective exposure time, for closing the lens passage, whereby to terminate film exposure.