Yashica's telephoto prime in C/Y mount — the ML 135mm f/2.8 from the Contax/Yashica system.
The Yashica ML 135mm f/2.8 is a telephoto prime from the Contax/Yashica mount system. Yashica's ML lenses shared the C/Y mount with the premium Zeiss-branded Contax lenses but at a more affordable price point. The ML designation indicates Yashica's multi-layer coating. At 135mm f/2.8, it provides a classic portrait and telephoto perspective.
Optical performance is decent. Sharpness is good when stopped down and acceptable wide open. The ML multi-coating provides reasonable contrast and flare resistance. The rendering is pleasant for portraits without the clinical perfection of the Zeiss 135mm f/2.8 Sonnar that shared the same mount. A capable vintage telephoto at a budget price point.
Contax/Yashica mount, manual focus. Filter thread is 55mm. Weight is approximately 400 grams. Build quality is solid with metal construction typical of quality Japanese lenses from this era. The C/Y mount adapts well to mirrorless cameras via simple adapters. Compatible with all Contax and Yashica SLR bodies.
Affordable on the used market — significantly cheaper than the Zeiss C/Y alternatives. Check for haze, fungus, and smooth focus operation. A good budget 135mm for C/Y system users or mirrorless adapters. The Zeiss 135mm f/2.8 Sonnar is optically superior but costs considerably more.