JUPITER 8 Red P USSR Lens F 2/50 mm for M39 L39 mount FED Zorki Leica Camera

Jupiter-8 P 50mm f / 2 - aperture standard lens with a fixed focal length and a single layer of chemically-coated for cameras with threaded connections M39 Leica Screw Mount (LSM).

The actual focal length: 52.49 mm
Angle of view - 45 °
The front vertex focal length: -49.60 mm
Back vertex focal length: 27.75 mm
The distance from the first to the last surface: 31.74 mm
Light diameter of the first surface - 29.0 mm
Light diameter of the last surface - 22.0 mm
Resolution (0 mm / 10 mm / 20 mm): 39/29/24 lines / mm
Resolution of TU (center / edge): 30/14 lines / mm
Light transmission coefficient: 0.81
Geometric vignetting: 56%