Ross Landscape Camera Singlet Meniscus Lens

Singlet meniscus lens, manufactured by Ross. Single lens in mounted at one end of a copper alloy body tube. A circular aperture is found at other end of tube. Aperture is protected by a retractable dust cap which rotates around a screw inserted beside aperture. A movable collar surrounds body tube. Collar has screw thread for attaching lens to camera. Manufacturer's name is engraved on side of collar.