Carl Zeiss Jena's standard prime for Exakta — the fast 50mm f/2 with CZJ character.
This Carl Zeiss 50mm f/2 in Exakta fit is a fast standard prime from the Carl Zeiss range (likely Zeiss Jena Pancolar or similar) for the Ihagee Exakta SLR system. The f/2 maximum aperture was among the fastest available standard primes in the film SLR era.
The lens delivers 50mm at f/2 maximum aperture with Carl Zeiss optical quality, Exakta bayonet mount, manual focus, manual aperture, and full-frame 35mm coverage. Specific optical formula (Biotar, Pancolar, or other) would be confirmed from the physical lens markings.
Carl Zeiss fast standard primes in Exakta mount are among the most sought-after vintage lenses for adaptation to modern mirrorless cameras, where their smooth rendering and fast aperture provide a distinctive character. Exakta adapters are readily available for Sony FE, Micro Four Thirds, Fujifilm X, and other systems.
Identify the specific optical formula from the lens markings (Pancolar, Biotar, Flektogon variant, etc.). Test aperture ring and focus ring operation. Inspect Zeiss T-coating on elements. Verify Exakta bayonet coupling. Optical condition and specific formula variant are key determinants of collector and practical value.