Brief Description: Rare and collectible Soviet LZOS Rubinar MC 500mm f/5.6 Macro mirror lens from 1994, offered as a complete original kit with hard case, filters, lens hood, caps, and Russian manual/passport. This is the rarer and more desirable f/5.6 version, known for its unique catadioptric optical design, sharp rendering, and distinctive donut bokeh. Popular among vintage lens collectors, mirrorless photographers, wildlife, astronomy, and cinematic video enthusiasts.