Manual focus - Adaptall mount

This is a ""Catadioptric"" type telephoto lens with two silver evaporation coated reflective mirrors. The silv

Manual focus - Adaptall mount

This is a ""Catadioptric"" type telephoto lens with two silver evaporation coated reflective mirrors. The silver evaporation coating on the rear lens surface compensates for spherical aberrations on reflective surface giving high quality images throughout the focusing range.