Canon EF 20mm lens

Canon EF 20 mm lens
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
Construction	11 elements in 9 groups
Features
Short back focus	No
Lens-based stabilization	No
Macro capable	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.

References

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

External links

EF20mm f/2.8 USM - Canon museum

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[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".

[1]

[2]

v t e Canon EF/EF-S/EF-M lenses
EF-S zoom	EF-S 10–18mm EF-S 10–22mm EF-S 15–85mm EF-S 17–55mm EF-S 17–85mm EF-S 18–55mm EF-S 18–135mm EF-S 18–200mm EF-S 55–250mm
Ultra-wide zoom	EF 11–24mm EF 16–35mm EF 17–40mm
Standard zoom	EF 24–70mm EF 24–105mm EF 28–135mm EF 28–300mm
Telephoto zoom	EF 70–200mm EF 70–300mm EF 75–300mm EF 100–400mm EF 200–400mm
Wide-angle prime	EF 14mm EF 20mm EF 24mm EF-S 24mm EF 28mm EF 35mm
Standard prime	EF 50mm
Telephoto prime	EF 85mm EF 100mm EF 135mm EF 200mm
Super telephoto prime	EF 300mm EF 400mm EF 500mm EF 600mm EF 800mm
Distorting lens	EF 8–15mm Fisheye
Tilt-shift	TS-E 17mm TS-E 24mm TS-E 45mm TS-E 50mm TS-E 90mm TS-E 135mm
Macro	EF-M 28mm Macro EF-S 35mm Macro EF 50mm Compact Macro TS-E 50mm MACRO EF-S 60mm Macro MP-E 65mm 1–5x Macro TS-E 90mm Macro EF 100mm Macro TS-E 135mm Macro EF 180mm Macro
EF-M zoom	EF-M 11–22mm EF-M 15–45mm EF-M 18–55mm EF-M 18–150mm EF-M 55–200mm
EF-M prime	EF-M 22mm EF-M 28mm Macro EF-M 32mm
Lens accessories	Extender EF
Discontinued zoom	EF 17–35mm EF 20–35mm EF 22–55mm EF 24–85mm EF 28–70mm EF 28–80mm EF 28–90mm EF 28–105mm EF 28–200mm EF 35–70mm EF 35–80mm EF 35–105mm EF 35–135mm EF 35–350mm EF 38–76mm EF 50–200mm EF 55–200mm EF 70–210mm EF 80–200mm EF 90–300mm EF 100–200mm EF 100–300mm
Discontinued prime	EF 15mm Fisheye EF 40mm EF 135mm with Softfocus EF 1200mm TS-E 45mm