The Tessar 50mm f/2.8 is a standard lens for the Contarex system, designed as a more affordable option.
It features a black barrel finish and was introduced in 1960, remaining in production until 1969.
A total of 5,978 units were produced.
Manufactured by Carl Zeiss in Oberkochen, this particular example, with a serial number in the 4,160,000 range, was made in 1965.
It features the classic Tessar optical design with 4 elements in 3 groups.
The minimum focusing distance is 35 cm.
The measured weight is a lightweight 206g.

There are minor scuff marks on the aluminum helicoid ring, but overall, the lens shows minimal signs of use and maintains a fairly clean appearance.
All functions operate properly.
The glass shows slight coating deterioration and a small amount of haze around the edges, but neither is expected to affect actual shooting performance.
The lens comes with its original front cap and a plastic case marked with the Zeiss Ikon name (note that the serial number on the case does not match the lens).