N°100039 · Family detail
Carl ZeissWide·PRAKTICA B mount·1979
Carl Zeiss Jena DDR Prakticar 20mm F/2.8 MC
Specifications01
MountPRAKTICA B
Focal length20mm
Max aperturef/2.8
TypeWide · Prime
Release year1979
Weight310 g
Filter size67 mm
Min focus distance0.2 m
Aperture blades6
Optical elements9
Groups8
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeUltra-wide angle prime lens
Summary02
20mm f/2.8 prime wide-angle lens for Praktica B (M42) mounts. Intended for general wide-angle photography such as landscapes and interiors.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Praktica B mount has a flange distance of 44.4 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Sony EAdapter · 26.4 mm
- Canon RFAdapter · 24.4 mm
- Nikon ZAdapter · 28.4 mm
- Fujifilm XAdapter · 26.7 mm
- L-MountAdapter · 24.4 mm
- Micro Four ThirdsAdapter · 25.15 mm
- Fujifilm G (GFX)Adapter · 17.7 mm
Covers full-frame: it can vignette on a medium format sensor.
- Canon EF-MAdapter · 26.4 mm
No plain adapter reaches infinity focus on: Canon EF, Nikon F.
Other Mounts03
No alternate mounts are indexed for this family yet.