Quick answer
The Canon EF 17–40mm lens is a ultra-wide to standard zoom lens covering 17-40mm at f/4.0 for the Canon EF mount. Its moderate maximum aperture works best in good light or with a higher ISO.
About this lens
The Canon EF 17–40mm lens is a wide-angle zoom lens covering 17-40mm at f/4 for Canon EF mount cameras. It covers wide angles for landscapes, interiors and architecture.
Canon EF 17–40mm lens specifications
- Brand
- Canon
- Mount
- Canon EF
- Focal length
- 17-40mm
- Maximum aperture
- f/4.0
- Lens type
- Zoom
- Released
- 2003
- Minimum focus distance
- 0.28 m
- Filter thread
- 77 mm
- Weight
- 500 g
- Length
- 96.8 mm
- Diameter
- 83.5 mm
Specification source: wikidata.org
What can you shoot with the Canon EF 17–40mm lens?
At 17-40mm this is a ultra-wide to standard zoom, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
- Landscapes and cityscapes
- Street and travel photography
Its moderate maximum aperture works best in good light or with a higher ISO.
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 | 17–40mm | 48.5–93.3° | 56.8–103.7° |
| APS-C | 1.6x | 27–64mm | 31.4–67° | 37.4–77° |
Frequently asked questions
What mount does the Canon EF 17–40mm lens use?
It uses the Canon EF mount, so it fits Canon EF cameras directly.
What is the focal length of the Canon EF 17–40mm lens?
It zooms across 17-40mm with a maximum aperture of f/4.0. That makes it a ultra-wide to standard lens.
Is the Canon EF 17–40mm lens a prime or a zoom lens?
It is a zoom lens covering 17-40mm, so you can reframe without moving. Its maximum aperture is f/4.0.
What is the Canon EF 17–40mm lens equivalent on a crop sensor?
On APS-C (1.6x crop) it frames like 27–64mm on full frame, with a 31.4–67° horizontal and 37.4–77° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Canon EF 17–40mm 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.
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All Canon lenses
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