Jupiter 9
1957, KMZ
Sergey
The Jupiter 9 f/2/85mm lens made in the Soviet Union in 1957 by the Mechanical Factory of Krasnogorsk (KMZ), based on the design of the Carl Zeiss Sonnar. Production began in 1948, when the lens was initially called the ЗК-85 (Sonnar Kransogorsk).
The lens has seven glass elements in three groups; a single glass at the front, and two cemented groups of three.