GOI Jachma K MC 2.8/300mm prototype

Commissioned by the Soviet Olympic Committee in 1978 and developed by the State Optical Institute (GOI) for the 1980 Moscow Olympic Games, this ambitious telephoto lens was originally intended for use with the newly introduced Almaz-102 camera. Due to its highly complex optical system, however, performance comparable to contemporary Nikon and Canon designs could not be achieved at the time, and production was delayed. Only in 1986 did the Zavod Arsenal in Kiev begin small-scale production of the Yashma-4N lens for Kiev SLR cameras with Nikon mount.

The example offered here is the only documented GOI prototype known to survive in fully operational condition. Like the later series, it features internal focusing, a built-in filter drawer, and multi-coated optics, but uniquely in the original Almaz (Pentax K) mount. The engravings are made in both Cyrillic and Latin script, suggesting that this prototype may have been intended as a presentation model for international audiences. Well preserved and fully functional, with good optics, this rare prototype is offered complete with an Almaz-103 camera body no. 8502292. A true rarity of museum quality, representing a milestone in Soviet optical design and a unique opportunity for advanced collectors.