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Canon EF 20mm f/2.8 USM

Canon EF Autofocus

Canon EF 20mm f/2.8 USM

Focal length
20 mm
Aperture
f/2.8
Weight
405 g
Filter diameter
72 mm
Min. focus distance
25 cm
Length
71 mm
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At a Glance

The 20 mm wide-angle for full-frame Canon EF has an f/2.8 maximum aperture and weighs 405 g. It focuses down to 25 cm and allows manual focus override at any time. The wide field of view suits landscapes, architecture and interiors.

Good for

  • Landscape
  • Architecture
  • Interiors

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

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Min. focal length
20 mm
Max. focal length
20 mm
Max. aperture (min. zoom)
f/2.8
Max. aperture (max. zoom)
f/2.8
Min. aperture
f/22
Elements
11
Groups
9
Weight
405 g (0.89 lb)
Filter diameter
72 mm
Min. focus distance
25 cm (9.84 in)
Max. magnification
1:7.1 (0.14×)
Length
71 mm (2.8 in)
Diameter
78 mm (3.07 in)
Released
June 1992

Manufacturer data: canon-europe.com

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Canon EF 20mm f/2.8 USM fit?

The Canon EF 20mm f/2.8 USM is a full-frame lens for Canon EF cameras. On full-frame bodies it uses the whole sensor; on APS-C Canon EF cameras its field of view equals 32 mm in full-frame terms.

Canon EF cameras

Full frame:
Canon EOS-1D X Mark III,Canon EOS 6D Mark II,Canon EOS-1D X Mark II,Canon EOS 5D Mark IV,Canon EOS 5Ds,Canon EOS 5Ds R,Canon EOS 5D Mark III,Canon EOS 6D,Canon EOS-1D C,Canon EOS-1D X,Canon EOS 5D Mark II
APS-C:
Canon EOS 850D (Rebel T8i),Canon EOS 90D,Canon EOS 250D (Rebel SL3),Canon EOS 4000D (3000D, Rebel T100),Canon EOS 2000D (1500D, Rebel T7),Canon EOS 800D (Rebel T7i),Canon EOS 77D,Canon EOS 200D (Rebel SL2),Canon EOS 80D,Canon EOS 1300D (Rebel T6),Canon EOS 750D (Rebel T6i),Canon EOS 760D (Rebel T6s),Canon EOS 7D Mark II,Canon EOS 1200D (Rebel T5),Canon EOS 70D,Canon EOS 700D (Rebel T5i),Canon EOS 100D (Rebel SL1),Canon EOS 650D (Rebel T4i),Canon EOS 60Da,Canon EOS 600D (Rebel T3i),Canon EOS 1100D (Rebel T3),Canon EOS 550D (Rebel T2i),Canon EOS 60D,Canon EOS 7D,Canon EOS 500D (Rebel T1i),Canon EOS 50D,Canon EOS 450D (Rebel XSi),Canon EOS 1000D (Rebel XS)

With the Canon Mount Adapter EF-EOS R the lens can also be used on Canon RF cameras.

With the Canon Mount Adapter EF-EOS M the lens can also be used on Canon EF-M cameras.

Canon EF 20mm f/2.8 USM compared

Key specs side by side with the most similar Canon EF lenses.

LensCanon EF 20mm f/2.8 USMSigma 20mm F1.8 EX DG Aspherical RFZeiss Distagon T* 2,8/21Zeiss Milvus 21mm F2.8
Focal length20 mm20 mm21 mm21 mm
Max. aperturef/2.8f/1.8f/2.8f/2.8
Weight405 g520 g600 g851 g
Filter diameter72 mm82 mm82 mm82 mm
Min. focus distance25 cm20 cm22 cm22 cm
Length71 mm89.5 mm109 mm95 mm
Autofocusyesyesnono
Image stabilizationnononono
Open these lenses in the comparison and add more

Canon EF 20mm f/2.8 USM: FAQ

Does the Canon EF 20mm f/2.8 USM have autofocus?

Yes, the Canon EF 20mm f/2.8 USM has autofocus.

Does the Canon EF 20mm f/2.8 USM have image stabilization?

No, the Canon EF 20mm f/2.8 USM has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the Canon EF 20mm f/2.8 USM weigh?

The Canon EF 20mm f/2.8 USM weighs 405 g. It is 71 mm long with a diameter of 78 mm.

What filter size does the Canon EF 20mm f/2.8 USM use?

The Canon EF 20mm f/2.8 USM takes 72 mm screw-in filters.

How close can the Canon EF 20mm f/2.8 USM focus?

The minimum focus distance of the Canon EF 20mm f/2.8 USM is 25 cm, measured from the sensor plane.

Is the Canon EF 20mm f/2.8 USM a full-frame lens?

Yes, the Canon EF 20mm f/2.8 USM covers full frame. On APS-C cameras its field of view equals 32 mm in full-frame terms.

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