Carl Zeiss Jena's fast Exakta tele — the Sonnar 180mm f/2.8 Olympia-derived telephoto.
The Carl Zeiss Jena Sonnar 180mm f/2.8 is a fast telephoto prime from Jena, descended from the pre-war Olympia-Sonnar developed for sports coverage. Offered in the Exakta bayonet, it was the premium long lens of the system, large and heavy but bright for its focal length. It served photographers who needed reach with a wide aperture for portraits, sport and wildlife in the Exakta era.
This is a manual-focus Exakta-mount lens with a 180mm focal length and a maximum aperture of f/2.8. It uses a Sonnar-type telephoto optical layout and is a substantial, heavy lens. The aperture is set on the barrel and coupled through the Exakta actuating mechanism on supporting bodies. Exact element count, weight and filter thread are omitted here where they cannot be confirmed for the specific Exakta variant.
The Sonnar 180mm f/2.8 gives strong subject separation thanks to the combination of a long focal length and a bright aperture, throwing backgrounds well out of focus for portrait and sports work. Central sharpness is good and improves stopped down, while the rendering stays smooth and classical. Its reach and speed suit portraits, field sport and wildlife where a fast tele earns its weight.
This is a heavier and pricier lens than the 135mm Sonnars, and clean Exakta examples are sought after. Inspect the large front element for haze, fungus and coating wear, and confirm the aperture blades are dry and the ring firm. Because of the size, check the focus helicoid and any tripod collar for play. On mirrorless with an Exakta adapter it works as a bright manual tele, best supported on a tripod.