Abstract: An attachment for a photographic camera for alternately maintaining a focussing screen and a film holder in an operative position with respect to a camera. The attachment is provided with a focussing screen rendered movable by connection to a rotatable shaft between operative and operative positions to permit placement of the film holder when the screen is in its inoperative position. Locking means actuated by the rotatable shaft are provided to lock the focussing screen or the film holder in operative positions. Also, means operated by rotation of the shaft are provided to control the condition of the camera shutter.

Abstract: A container for photographic processing composition being releasably sealed by a novel seal provided by a flexible web releasably bonded to a plurality of lips surrounding an aperture in the container. The novel seal is such that, owing to its relatively small area of bonding between the web and the lips, it assures proper separation of the web from the lips when a pulling force is exerted on it. The seal formed by the bonding of the web to the plurality of lips is such that it withstands rupture that might result from excessive internal pressure in the composition when subjected to shock forces.