Canon EF 20mm F/2.8 USM

Specifications01

MountCANON EF

Focal length20mm

Max aperturef/2.8

TypeWide · Prime

Release year1992

Weight405 g

Filter size72 mm

Physical length70.6 mm

Min focus distance0.25 m

Max magnification0.1401

Aperture blades6

Optical elements11

Groups9

AutofocusYes

StabilizationNo

Aperture controlNone The aperture is controlled from the camera

Lens hoodEW-75II - Bayonet-type petal-shaped

TeleconvertersNot compatible

Sensor coverage43.3 mm

EraFilm era

Production statusDiscontinued

Additional Info02

SpecialUSM

Lens TypeUltra-wide angle prime lens

Summary02

Canon EF 20mm f/2.8 USM is a wide-angle prime lens for Canon EF-mount DSLRs, intended for landscapes and general wide-angle photography. It has a fixed maximum aperture of f/2.8.

AI-assisted summary — verify against linked sources

Specifications from thelensdb

Where can this lens be adapted?

The Canon EF mount has a flange distance of 44 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.

Sony EAdapter · 26 mm
The camera mount (46.1 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
Canon RFAdapter · 24 mm
Nikon ZAdapter · 28 mm
Fujifilm XAdapter · 26.3 mm
L-MountAdapter · 24 mm
The camera mount (51.6 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
Micro Four ThirdsAdapter · 24.75 mm
Fujifilm G (GFX)Adapter · 17.3 mm
Covers full-frame: it can vignette on a medium format sensor.
Canon EF-MAdapter · 26 mm
Canon EFNative