Bellows camera having reflex mirror and automatic exposure control

Claim 1

A bellows camera for use on microscopes for photomicrographic purposes, the camera having a reflex viewing device and an automatic exposure control and comprising in combination: a shutter disposed between the microscope tube and the camera housing; a bellows suspended between a bellows carrier plate and said shutter; a camera housing mounted on said bellows carrier plate and including a pivotable reflex mirror, a viewing screen, and a plateholder on its upper side; a first measuring diaphragm disposed in a plane conjugate to the film or image of the camera; a mirror in the camera housing, said mirror reflecting a portion of the total image-forming light rays into said first measuring diaphragm when said reflex mirror is in its exposure position; a second measuring diaphragm being disposed in the plane of said viewing screen in a place whereon the same portion of imageforming light rays which is reflected into said first measuring diaphragm when said reflex mirror is in its exposure position is reflected by said pivotable reflex mirror when the latter is in its viewing position; and a light-sensitive element behind said first measuring diaphragm.