Monocular made by Carl Zeiss. It is made for the Contaflex model III, IV, rapid, and super as it can be screwed directly into the filter thread of the 50mm f2.8 Tessar. This will transform the lens into a 400mm f14 telephoto. Metal body available in black.

• Size: 94 x 70 x 53 mm
• Weight: 225 g