UV filter made by Leica with a ~21mm screw thread. Cuts out ultraviolet light as well as protects the lens. Very thin design in both frame and thread lenght. Might originally have been designed for the Leica Hektor 5cm f2.5 or other Leica lenses with 21mm filter threads. Metal body available in black.

• Size: 27 x 2mm
• Weight: 4g