Quick answer
The Canon EF 20mm lens is a ultra-wide prime lens covering 20mm at f/2.8 for the Canon EF mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
Canon EF 20mm lens: a wide-angle prime lens with a 20mm focal length and a maximum aperture of f/2.8, made for Canon EF mount cameras. The wide view suits landscapes, architecture and environmental shots.
Canon EF 20mm lens specifications
- Brand
- Canon
- Mount
- Canon EF
- Focal length
- 20mm
- Maximum aperture
- f/2.8
- Lens type
- Prime
- Released
- 1992
- Minimum focus distance
- 0.25 m
- Filter thread
- 72 mm
- Weight
- 405 g
- Length
- 70.6 mm
- Diameter
- 77.5 mm
Specification source: wikidata.org
What can you shoot with the Canon EF 20mm lens?
At 20mm this is a ultra-wide prime, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
Its bright maximum aperture handles indoor and evening light reasonably well.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 20mm | 84° | 94.5° |
| APS-C | 1.6x | 32mm | 58.7° | 68.1° |
Frequently asked questions
What mount does the Canon EF 20mm lens use?
It uses the Canon EF mount, so it fits Canon EF cameras directly.
What is the focal length of the Canon EF 20mm lens?
It is a fixed 20mm lens with a maximum aperture of f/2.8. That makes it a ultra-wide lens.
Is the Canon EF 20mm lens a prime or a zoom lens?
It is a prime lens with a fixed 20mm focal length. Primes usually open wider than zooms; this one opens to f/2.8.
What is the Canon EF 20mm lens equivalent on a crop sensor?
On APS-C (1.6x crop) it frames like 32mm on full frame, with a 58.7° horizontal and 68.1° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Canon EF 20mm lens fit?
Any Canon EF-mount camera, including Canon EOS 1D X, Canon EOS 5D, Canon EOS 5D Mark II, Canon EOS 5D Mark III, and Canon EOS 5D Mark IV and 7 more.
Alternatives for Canon EF from other brands
All Canon EF lensesSame mount, overlapping focal range, closest maximum aperture first.
