Lens mount for camera filter holder - has adaptor ring with lateral securing screw

摘要

The filters and rasters are held in a rectangular, light proof box (1) mounted on the front of the camera, and with the lens (8) clipped to an opening in the front of the box. An adapter ring (2) is fitted to the front of the box either by securing screws or by a threaded clamping ring (33) through the defining aperture. The lens is secured by locating in the stepped ring and by tightening a clamping screw (30). The lens is fitted by one rapid action, enabling different lenses to be exchanged. The adaptor ring is easily fitted to most filter boxes.