The 300 mm Tele-Tessar® T* f/4 lens offers a long focal length, remarkably high speed, compact
design and easy operation at one and the same time. It is a telephoto design where the distance
between the front lens vertex and the rear focus is only about 80% of the focal length. It offers
virtually perfect monochromatic correction and excellent image quality even at full aperture - a
decisive improvement over earlier telephoto designs.