Canon EF 20mm lens

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Canon EF 20 mm lens
Canon-20mm MG 2033.jpg
Maker Canon
Technical data
Type wide-angle prime lens
Focus drive Ultrasonic motor
Focal length 20 mm
Crop factor 1.0
Aperture (max/min) f/ 2.8 - f/ 22
Close focus distance 0.25 m (0.82 ft)
Max. magnification 0.14x
Diaphragm blades 6[1][2]
Construction 11 elements / 9 groups
Features
Short back focus No No
Lens-based stabilization No No
Macro capable No No
Application interiors, reportage, general
Physical
Max. length 70.6 mm (2.78 in)
Diameter 77.5 mm (3.05 in)
Weight 405 g (14.3 oz)
Filter diameter 72 mm
Accessories
Lens hood EW-75II
Angle of view
Horizontal 84°
Vertical 62°
Diagonal 94°
History
Introduction June 1992
Retail info
MSRP 75,000 yen USD

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.

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