Lens manufactured in 1976. There are some scuffs and scratches on the glass. Attention!!! The filter mounting ring is bent!
Zeiss Sonnar 5.0cm f/2.8 COPYThe Jupiter-8 (sometimes marked in Cyrillic, ЮПИТЕР-8) is a postwar Soviet copy of the prewar Zeiss Sonnar 50mm f/2 for the Contax, built with six elements in three groups. It was made in Contax and M39 mounts, both for rangefinder cameras.Without a doubt the strength of the lens is the image quality. Soviet optical factories were known for sharp optics, and this one is no exception. The edges are not so good but the center is.The lens was originally available only in the natural rather dull "silver" of aluminum but in the 1970s was also made with a black finish. It belonged to the Soviet class of lenses which was named Jupiter.DescriptionFocal length - mm 52 Geometrical relative aperture 1:2Corner of a field of vision: 45 ° The size of a shot: 24x36 mmQuantity of lenses/groups: 6/3 Forward topmost focal length: −49,60 mmBack topmost focal length: 27,75 mm Distance from the first to last surface: 31,74 mmLight diameter of the first surface: Ø29,0 mm Light diameter of last surface: Ø22,0 mmResolution (0mm/10 mm mm/20): 39/29/24 lines/mm Resolution on THAT (centre/field): 30/14 lines/mmEnlightenment type: chemical, single-layered Limits of a scale of diaphragms: 1:2 - 1:22Near limit of focusing: 1 m Working distance: 28,8 mmLens with the camera thread : M39x1 Weight: 130 gr