Carl Zeiss N-Mirotar 210mm

A unique 210 mm telephoto lens for night photography. The N-Mirotar has the capacity to transform subjects invisible to the naked eye in near pitch darkness into bright illuminated daylight-type scenes. Using only general-purpose black and white films, the image amplifier tube of the N-Mirotar intensifies residual light of the scenes 80,000 times and passes it on to the macro lens which delivers illumination to the film plane at 2.500 times the intensity of an f/1.4 lens. The effective lens speed is f/0.03. The N-Mirotar features a special grip for easy handheld shooting and operates up to 40 hrs. on two 1.5V penlight batteries, in total only 43 of these lenses have been produced for Contax YB, complete and fully working in special case