CZJ-branded Praktica 135mm — the multi-coated f/2.8 telephoto from Carl Zeiss Jena.
The Praktica 135mm f/2.8 MC CZ Jena is a fast telephoto branded as Praktica but manufactured by Carl Zeiss Jena. The MC designation indicates multi-coating. At f/2.8, it is faster than the Pentacon f/3.5 alternative (ID 4551). The CZJ origin ensures genuine optical quality. Mount not specified but likely Praktica B or M42.
CZJ optical quality is genuine — the Jena designation confirms Carl Zeiss manufacture. Multi-coating improves contrast. The f/2.8 provides useful speed at 135mm for portraits. Sharpness is good for the CZJ standard. Build quality is solid German precision. Better than Pentacon alternatives in the Praktica system.
Mount likely Praktica B or M42 — verify. If M42, universal camera compatibility makes this more practical. CZJ quality with MC coating. Manual focus. The mount determination is critical — M42 provides far more utility than Praktica B. Filter thread varies. Build quality CZJ precision.
Check mount carefully — M42 is dramatically more useful than Praktica B. CZJ quality with f/2.8 speed and MC coating. If M42, this is a good vintage telephoto for mirrorless adaptation. If Praktica B, limited to the restricted system. The CZJ quality justifies seeking this lens over Pentacon alternatives.