GOI Leningrad f. M42 2.9/38-78mm Space prototype

Until now completely unknown prototype lens developed for the Soviet space program. This unique lens has a zoom function from 38mm to 78mm with fast constant aperture of f:2.9, it also features internal focusing. The generous focusing lever is located on the front of the lens to allow easier operation with spacesuit gloves. The lens is in very good condition, optics only show slight flaws in the coating. It is one of the most advanced Soviet optical constructions and one of the rarest lenses existing.