Zeiss's rare fast Contax prime — the Planar T* 55mm f/1.2, limited-run manual-focus glass for the C/Y mount.
The Zeiss Planar T* 55mm f/1.2 was a very fast standard prime for the Contax/Yashica mount, released in 1997 as a limited commemorative lens produced in small numbers. It was among the fastest optics ever offered in the Contax system.
This is a manual-focus C/Y-mount lens with a 55mm focal length and a maximum aperture of f/1.2. The bright f/1.2 opening pushed the Planar design to its limits for shallow depth of field and low-light capture. Precise figures are omitted where they cannot be verified.
The very fast aperture and near-standard focal length suit portraits and available-light work where thin depth of field and subject isolation are the goal. Its wide-open rendering is a key part of why collectors prize it.
This is a rare and expensive collector's lens that commands a substantial premium on the used market. Inspect thoroughly for haze, fungus and coating wear, confirm smooth focus and clean aperture action, and verify originality and condition given the value. A C/Y adapter allows mirrorless use.