Carl Zeiss Sonnar 135mm f/3.5 lens, made in DDR. - Model: Carl Zeiss Sonnar 135mm f/3.5 - Focal Length: 135mm - Aperture: f/3.5 - Country of Manufacture: DDR Thank you for viewing. This is an old lens made by Carl Zeiss. It has an M42 screw mount, so please use a mount adapter when using it with a mirrorless camera. If you wish, we can prepare it as a set. The lens is in extremely good condition. It has been stored in a dehumidified storage cabinet. Focal Length...150mm Maximum Aperture...3.5 Other Features...Old lens