Lens Lab
Steinheil München REGULA-Auto-Cassaron 50 mm f/ 2.8
50mm · f/2.8
Overview
The Steinheil München REGULA-Auto-Cassaron 50mm f/2.8 is a compact, well-built vintage lens with a solid metal feel. Optically, it delivers dreamy, soft images wide open with noticeable corner softness and glow, but sharpens when stopped down. It exhibits heavy flare and ghosting, likely due to minimal coatings, which some users appreciate for character. Bokeh is generally pleasant but occasionally uneven. This lens suits photographers seeking a vintage, low-contrast look and forgiving flare, rather than technical perfection.