Bellows Extension unit for Macro Photography.
This runs on four rugged racks fitted to the camera standard that mounts like a lens into the camera body. The lens fits into the front standard, and is driven along the focusing stage with a rack and pinion movement that can lock and hold any position with a clamp screw. Extension from 67mm to 204mm can be set using the scale on the side of the rack. The stage itself has a 1/4 inch tripod socket.
