A 75mm f/2.5 Color Heliar lens by Schneider.
The Voigtlander 75mm f/2.5 Color Heliar is a short telephoto prime for Leica Thread Mount (L39/M39) rangefinder cameras, produced by Cosina under the Voigtlander brand as part of the Bessa rangefinder lens revival. The Heliar formula — a 5-element symmetrical design — originates in Voigtlander's pre-war optical heritage; the 'Color' prefix indicates multicoating. The 75mm focal length covers portrait-range fields of view on full-frame.
75mm focal length, f/2.5 maximum aperture, Heliar formula (5 elements), multicoated, Leica Thread Mount (L39/M39), aperture ring, focus ring with rangefinder coupling. Compact portrait-range prime.
The 75mm focal length on full-frame is between the 50mm standard and classic 85mm portrait length — preferred by some portrait photographers for slightly more natural compression with less working distance required. Compared to the Voigtlander Heliar Classic 75mm f/1.8 VM (Leica M bayonet), this L39 version requires an M-adapter to use on M-mount bodies and offers a slower, more compact form factor. Note: the canonical name in this database attributes the lens to 'Schneider,' which appears to be a data entry error — the Color Heliar formula is exclusively Voigtlander/Cosina.
Check rangefinder coupling accuracy at multiple focus distances. Inspect multicoating for cleaning marks. Test aperture blade condition at intermediate stops. Verify L39 thread engagement on adapters or Leica rangefinder body. Cross-check against Voigtlander product documentation — not Schneider.