Jupiter 8 2.0/50mm M39 FED Zorky Leica RF silver Soviet Sonnar copy lens

+ front cover

Old Jupiter - 8 2/50 lens silver rare edition

Krasnogorsk Optical Glass Plant, KMZ

for rangefinder cameras Leica Zorky FED

Copy of Zeiss Sonnar 5.0cm f/2.8 lens

The Jupiter-8 (sometimes denoted in Cyrillic - YUPITER-8) is a post-war Soviet copy of the pre-war Zeiss Sonnar 50mm f/2 lens for Contax, consisting of six elements in three groups. It was produced with Contax and M39 mounts, both for rangefinder cameras.

Undoubtedly, the strong point of the lens is the image quality. Soviet optical factories were famous for sharp optics, and this lens is no exception. The edges aren't as good, but the center is.

Initially the lens was available only in natural, rather dull "silver" aluminum, but in the 1970s they started to produce it with black coating as well. It belonged to the Soviet class of lenses called "Jupiter".

Description

Focal length - mm 52 Geometric relative aperture 1:2

Angle of field of view: 45° Frame size: 24x36 mm

Number of lenses/groups: 6/3 Front upper focal length: -49.60 mm

Rear upper focal length: 27.75 mm Distance from first to last surface: 31.74 mm

Light diameter of the first surface: Ø29.0 mm Light diameter of the last surface: Ø22.0 mm

Resolution (0 mm/10 mm/20): 39/29/24 lines/mm TO resolution (center/field): 30/14 lines/mm

Enlightenment type: chemical, single-layer Aperture scale limits: 1:2 - 1:22

Near focus limit: 1 m Working distance: 28.8 mm

Threaded lens: M39x1 Weight: 130 g.

Lens Condition:

✅Focusing works with enough smoothness to be a pleasure to work with

✅The iris opens and closes smoothly.

❌There are a few defects on the lumen in the form of dots (shown in the first photo). Does not affect the photo. Also on the lens there are small scratches from wiping.

❌Some dust particles under the lenses.