N°100037 · Family detail
CanonWide·CANON FD mount·1979
Canon FDn 20mm F/2.8
Specifications01
MountCANON FD
Focal length20mm
Max aperturef/2.8
TypeWide · Prime
Release year1979
Weight305 g
Filter size72 mm
Min focus distance0.25 m
Max magnification0.1299
Aperture blades6
Optical elements10
Groups9
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodBW-72 - Bayonet-type round
TeleconvertersCanon Extender FD 2X-B→ 40mm F/5.6
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeUltra-wide angle prime lens
Summary02
Canon FDn 20mm F/2.8 is a fixed 20mm wide-angle prime for Canon FD-mount cameras, suited to landscapes, interiors, and general wide-angle use. It has a maximum aperture of f/2.8.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Canon FD mount has a flange distance of 42 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- FD lenses stay at full aperture until the camera moves a lever on the lens. Use an FD adapter with a ring that moves this lever.
- Sony EAdapter · 24 mm
- Canon RFAdapter · 22 mm
- Nikon ZAdapter · 26 mm
- Fujifilm XAdapter · 24.3 mm
- L-MountAdapter · 22 mm
- Micro Four ThirdsAdapter · 22.75 mm
- Fujifilm G (GFX)Adapter · 15.3 mm
Covers full-frame: it can vignette on a medium format sensor.
- Canon EF-MAdapter · 24 mm
No plain adapter reaches infinity focus on: Canon EF, Nikon F.
Other Mounts03
No alternate mounts are indexed for this family yet.