The Jupiter-8 50 mm f/ 2 (Russian: "Юпитер") is a fast standard  prime lens with a single-layer chemical coating for cameras with the m39 Leica Screw Mount (LSM) and the Contax I-III system (CRM).

It was also produced in a bayonet variant for Kiev rangefinder cameras.

• Real focal length: 52 mm.
• Resolution (0 mm/10 mm/20 mm)
• Resolution according to the technical specifications (centre/edge):30/14 lines/mm
• Coefficient of transparency: 0.81
• Geometric vignetting: 56%