Vintage Jupiter-8M lens Carl Zeiss Sonnar lens film camera photography ussr

Description

Standard lens with coated optics for rangefinder cameras. Replica of the Carl Zeiss Sonnar 1: 2/5 cm lens. The design and technological documentation for this Zeiss lens went to the USSR as reparations.
Variants of Jupiter-8 with M39 and Contax-Kiev threads were produced for rangefinder cameras Zorkiy and Kiev, respectively.
Focal length: 50mm
Field of view: 45 °
Frame size: 24 × 36 mm
Number of lenses / groups: 6/3
Working distance - 31.85 mm
Aperture ratio: 1: 2
Aperture scale limits: 1: 2–1: 22
Aperture blades - 9
Aperture adjustment - with fixed positions.
Aperture preset - none
Near focusing limit - 1 m
Connections:
lens with camera - internal mount Contax-Kiev
for screw-in bits - M40.5 × 0.5
for slip-on attachments - ∅42 mm
Filter Mount Location: Front
Resolution according to TU (center / edge): 32/18 lines / mm
Light transmittance coefficient: 0.81
Weight - 130 g
Jupiter-8M gives, in general, a picture similar to Jupiter-8. This means the lens is great. With a soft and distinctive pattern. With good aperture and a beautiful pattern in the out-of-focus area.