Pentacon Six / Praktisix Lenses

3 interactive lens diagrams

Praktisix and Pentacon six medium-format SLR system | 6×6 roll film

Carl Zeiss Jena manufacturer catalogs list 6×6 Biometar and Flektogon lenses for Praktisix and Pentacon six cameras. Their medium-format bayonet is distinct from the Praktina, M42 and Praktica B interfaces used by other Jena production variants.

CARL ZEISS JENA BIOMETAR 120mm f/2.8— 5 ELEMENTS / 4 GROUPS, f = 119.232 mm (design), F/2.8 (modeled calibration)CARL ZEISS JENA BIOMETAR 80mm f/2.8— 5 ELEMENTS / 4 GROUPS, f = 80.61 mm (0.8× scaled), F/2.8 (stop calibrated)CARL ZEISS JENA FLEKTOGON 50mm f/4— 7 ELEMENTS / 4 GROUPS, f ≈ 50.00 mm, F/4