This copy of the Jupiter 8 was likely manufactured in the early 1960s based on the design and serial number. The lens barrel is made from aluminium, which makes the lens very light, at roughly 130 grams. It is also very common to find the 40.5mm filter thread bent, due to the soft light metal.
The lens mount is Leica Thread Mount (L39). While this will attach to a Leica, the slightly different register required on the Zorki camera, that it was designed for and the lower quality control from the Soviet factory at the time, means that the lens is well known to impact the exact focusing, generally back focusing on a Leica.
The Jupiter 8 has a Sonnar lens design, with a construction of six elements in three groups. Single lens coating has been applied to the front element, which is meant to reduce flare control.
Aperture range is from f/2 to f/22 with 9 aperture blades. The aperture ring is at the front of the lens and does not have click steps. Focusing is through the ring further back on the lens, and is from 1 metre through to infinity.
Optical design:6 elements in 3 groups.
Analog Carl Zeiss Sonnar 1:2/5 cm
Aperture:f/2 to f/22
9 bladed aperture
Covers:Standard 35mm film size
(24×36 mm negative)
Filter Size:M40.5x0.5 mm