Carl Zeiss Jena's telephoto for Exakta — the 135mm f/4 Sonnar in vintage mount.
The Zeiss Sonnar 135mm f/4 in Exakta mount is a telephoto prime from Carl Zeiss Jena (East German) produced for the Ihagee Exakta SLR system. The Exakta bayonet was one of the earliest SLR lens mounts and supported a range of quality German optics. The Sonnar formula is Zeiss's classic telephoto design with low element count and smooth rendering.
The lens delivers 135mm at f/4 maximum aperture with Carl Zeiss Jena's optical quality and the characteristic Sonnar rendering, Exakta bayonet coupling for manual focus and aperture, and full-frame 35mm coverage. Build quality reflects East German precision optical manufacturing of the period.
Carl Zeiss Jena Exakta-mount lenses represent the pre-division Zeiss tradition of optical excellence, now accessible as vintage glass. The Exakta mount is adaptable to most modern mirrorless cameras with appropriate adapters, making Zeiss Sonnar rendering accessible to contemporary photographers at a fraction of new Zeiss pricing.
Test the Exakta bayonet coupling and verify focus ring operation. Inspect element condition for haze and T-coating (Zeiss multi-coating) integrity. Check aperture blade operation. For modern mirrorless adaptation, verify Exakta-to-target-mount adapters are available.