Canon EF 20mm lens

The Canon EF 20 mm f/2.8 USM lens is an ultra-wide-angle prime lens produced by Canon for the EF lens mount. It features an ultrasonic motor. On a camera with an APS-C sensor the focal length is equivalent to 32 mm, and it is classified as a wide-lens. It features a ring-type USM motor featuring full-time manual and a fixed front element. The optical scheme of the lens includes eleven element in nine groups without any special lens. The performances are considered good, but not enough to compete with modern prime lenses; some zoom lenses from the Canon L series offer similar performances.

Canon EF 20 mm lens
Canon-20mm MG 2033.jpg
Technical data
Typewide-angle prime lens
Focus driveUltrasonic motor
Focal length20 mm
Crop factor1.0
Aperture (max/min)f/ 2.8 - f/ 22
Close focus distance0.25 m (0.82 ft)
Max. magnification0.14x
Diaphragm blades6[1][2]
Construction11 elements in 9 groups
Short back focusNo No
Lens-based stabilizationNo No
Macro capableNo No
Applicationinteriors, reportage, general
Max. length70.6 mm (2.78 in)
Diameter77.5 mm (3.05 in)
Weight405 g (14.3 oz)
Filter diameter72 mm
Lens hoodEW-75II
Angle of view
IntroductionJune 1992
Retail info
MSRP75,000 yen USD


  1. ^ Canon Inc. "EF20mm f/2.8 USM". Canon Camera Museum. Retrieved 2017-05-12.
  2. ^ "SLRgear has moved! Our lens reviews are now all on the main IR site".

External linksEdit