KMZ Jupiter-8 50 mm F/2, UdSSR Objektiv für Fuji FX, Fujifilm X Mount !!! s/n: 6150629
KMZ Jupiter-8 50mm F/2, USSR Lens For Fuji FX, Fujifilm X mount ! It was available in the M39 lens mount, or "Leica thread mount". It is a copy of the Carl Zeiss Sonnar 50mm f2. Lens mount: M39, Fuji FX.