Zeiss's constant-aperture Contax tele zoom — the Vario-Sonnar T* 70-210mm f/3.5, manual-focus glass for the C/Y mount.
The Zeiss Vario-Sonnar T* 70-210mm f/3.5 was a telephoto zoom for the Contax/Yashica mount, offered from around 1980 and notable for a constant f/3.5 aperture across its range. The Vario-Sonnar name marks it as a Zeiss zoom design.
This is a manual-focus C/Y-mount zoom spanning 70-210mm with a constant maximum aperture of f/3.5. The fixed aperture held exposure steady while zooming through the telephoto range. Further specifications are omitted where they cannot be verified.
The 70-210mm range suits portraits, travel telephoto framing and some sport and wildlife, giving reach and compression with the flexibility to reframe without switching lenses. The constant aperture aids consistent exposure.
Used copies are a capable, moderately priced Contax telephoto zoom. Check the zoom and focus for smooth travel, look for internal haze, fungus and coating wear, and confirm clean aperture blades and any tripod collar. It adapts to mirrorless with a C/Y adapter.