The Russian Jupiter-8 is a high quality normal lens for the Leica Threadmount rangefinder cameras. It was sold as a standard lens on many cameras - Zorki-3, 3M, 4, 4K, Leningrad, Drug and some others. This lens is a copy of the famous Zeiss Sonnar 50/2.

It was produced in both LTM and Contax/Kiev mount and proved to be one of the most successful Soviet lenses. Of course, we have to credit Carl Zeiss for this.

This is the last version of the Jupiter-8, the barrel is finished in black, the lens is more compact and modern-looking. This is an excellent normal lens for your Leica or Bessa.

Focal length: 52.3 mm
Aperture: 1:2 (settings from 4 to 22)
Focusing: 1 m - infinity
Filter size: M40.5x0.5 mm
Optical registration (back focus): 28.8± 0.02 mm
Mount: M39x1 mm (LTM). The lens mounts and RF couples with any Leica or Leica copy (FED, Zorki etc.)

The glass is coated; the barrel is finished in black enamel.

(Source: www.fedka.com)