N°100197 · Family detail
Carl ZeissWide·CONTAX G mount·1996
Carl Zeiss G Biogon T* 21mm F/2.8
Specifications01
MountCONTAX G
Focal length21mm
Max aperturef/2.8
TypeWide · Prime
Release year1996
Weight200 g
Filter size55 mm
Min focus distance0.5 m
Max magnification0.0498
Aperture blades7
Optical elements9
Groups7
AutofocusYes
StabilizationNo
Aperture controlAperture ring
Lens hoodNot available
EraPro
Production statusFilm era
Additional Info02
Lens TypeUltra-wide angle prime lens
Summary02
21mm prime wide-angle lens with a maximum aperture of f/2.8 for the Contax G mount. Used for general wide-angle photography and low-light wide scenes.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Contax G mount has a flange distance of 29 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Contax G lenses have no focus ring: the camera focused them. Use an adapter with a focus dial.
- Sony EAdapter · 11 mm
- Canon RFAdapter · 9 mm
- Nikon ZAdapter · 13 mm
- Fujifilm XAdapter · 11.3 mm
- L-MountAdapter · 9 mm
- Micro Four ThirdsAdapter · 9.75 mm
- Fujifilm G (GFX)Adapter · 2.3 mm
Covers full-frame: it can vignette on a medium format sensor.
- Canon EF-MAdapter · 11 mm
No plain adapter reaches infinity focus on: Canon EF, Nikon F.
Sources03
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Other Mounts03
No alternate mounts are indexed for this family yet.