Contax 100-300mm F/4.5-5.6 Vario-Sonnar T* MM C/Y Mount Lens Review

The Contax 100-300mm F/4.5-5.6 Vario-Sonnar T* MM is a telephoto zoom lens built for the Contax/Yashica C/Y mount system. Part of the Vario-Sonnar T* line, it covers a versatile focal range suited for wildlife, sports, and portraiture, with the signature Zeiss T* coating aimed at controlling flare and boosting contrast. The variable aperture is typical for a zoom of this era and range, prioritizing reach and portability over speed. The 67mm filter thread keeps accessories manageable.

At this price point from KEH in bargain condition, the lens represents an affordable entry into vintage telephoto territory for shooters working with adapted C/Y glass on mirrorless bodies or maintaining legacy Contax film kits. Expect cosmetic wear and the handling quirks common to older zoom designs, but the Zeiss optical heritage still delivers when the glass is clean. This is a specialty piece for collectors, film photographers, or budget-conscious adaptors willing to work manually.