Fast telephoto prime lens with Carl Zeiss Planar optics for Contax/Yashica mount cameras.
The Carl Zeiss Planar T* 100mm f/2 is a fast telephoto portrait prime for the C/Y (Contax/Yashica) SLR system. At f/2 it provides exceptionally shallow depth of field for subject isolation. The Planar formula at 100mm is optimised for close-to-medium subject distances, making it a highly regarded portrait lens.
100mm focal length, f/2 maximum aperture, Carl Zeiss T* multi-coating, Planar formula, C/Y (Contax/Yashica) bayonet mount.
The C/Y Planar 100mm f/2 is among the most sought-after C/Y mount lenses for portrait photography, delivering Zeiss micro-contrast and smooth bokeh at f/2. Adapted to mirrorless cameras it remains a reference portrait lens. Wide open at f/2 the rendering is slightly soft in a pleasing way; at f/2.8 it is very sharp.
Inspect for fungus, haze, and T* coating condition. Test at f/2 for bokeh quality and transition rendering. Check aperture blades for oil-free operation — the wide f/2 aperture requires clean blades. Confirm C/Y bayonet engagement. Test focus helicoid smoothness.