N°8666470 · Family detail
Carl ZeissWide·M42 mount·1976
Carl Zeiss Jena DDR Flektogon 20mm F/2.8 [electric] MC
Specifications01
MountM42
Focal length20mm
Max aperturef/2.8
TypeWide · Prime
Release year1976
Weight350 g
Filter size67 mm
Min focus distance0.19 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
Carl Zeiss Jena Flektogon is a 20mm f/2.8 wide-angle manual-focus lens for M42 mount, suited for landscape and general wide-angle use. The [electric] marking indicates a specific version/variant.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The M42 screw mount has a flange distance of 45.46 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Many M42 lenses close the aperture only when a pin at the rear is pressed. Use an adapter that presses the pin, or set the A/M switch to M.
- Sony EAdapter · 27.46 mm
- Canon RFAdapter · 25.46 mm
- Nikon ZAdapter · 29.46 mm
- Fujifilm XAdapter · 27.76 mm
- L-MountAdapter · 25.46 mm
- Micro Four ThirdsAdapter · 26.21 mm
- Fujifilm G (GFX)Adapter · 18.76 mm
Covers full-frame: it can vignette on a medium format sensor.
- Canon EF-MAdapter · 27.46 mm
- Canon EFAdapter · 1.46 mm
A rear element that sticks out can hit the camera mirror.
No plain adapter reaches infinity focus on: Nikon F.
Other Mounts03
No alternate mounts are indexed for this family yet.