KMZ Jupiter-8 50 mm F/2, UdSSR Objektiv für Panasonyc, Olympus Micro 4/3! s/n: 6623461
KMZ Jupiter-8 50mm F/2, USSR Lens For Panasonyc, Olympus, Micro 4/3 ! It was available in the M39 lens mount, or "Leica thread mount". It is a copy of the Carl Zeiss Sonnar 50mm f2. Focal length: 50mm.