A panoramic camera has masking plates selectively movable for masking the exposure aperture so as to form a picture frame of a panoramic size or for opening the whole exposure aperture. A plate actuating mechanism provided on the fixed lens mount selectively sets the masking plates in either the full...http://www.google.de/patents/US5086311?utm_source=gb-gplus-sharePatent US5086311 - Panoramic camera
