Canon EF-S 10-22mm lens
|EF-S 10-22mm f/3.5-4.5 USM|
|Short back focus:||Yes|
|Focal length (35mm equiv.):||16-35mm|
|Frame coverage:||APS-C 1.6x|
|Aperture (max/min):||f/3.5-4.5 / f/22-29|
|Construction:||10 groups / 13 elements|
|# Diaphragm blades:||6|
|Close focus distance:||0.24 m (0.79 ft)|
|Max. magnification:||0.17 @ 22mm|
|Max. diameter:||83.5 mm (3.3 in)|
|Max. length:||89.8 mm (3.5 in)|
|Weight:||385g (13.6 oz)|
|Filter diameter:||77 mm|
|Lens hood:||EW-83E, optional|
|Angle of view|
|Horizontal:||97°10' – 54°30'|
|Vertical:||74°10' – 37°50'|
|Diagonal:||107° 30' – 63° 30'|
The Canon EF-S 10-22mm f/3.5-4.5 USM lens is a wide to ultra-wide angle zoom lens for Canon digital single-lens reflex cameras with a Canon EF-S lens mount. The field of view has a 35 mm equivalent focal length of 16-35mm, which is analogous to the EF 16-35mm f/2.8L on a full-frame camera. The 10-22mm is an internal focusing lens. Of the 13 elements, one is of Canon's Super Ultra-Low Dispersion glass and three are aspherical elements.
The 10–22 is considered to have good image quality (sharp and low distortion) and build. The optical construction is similar to L-series lenses, but it is not designated as L-series (as reflected in the build quality), which some have argued is for marketing reasons, as with the 17–55.
- "This is an extremely sharp lens, at all three tested focal lengths."
- "The Canon 10-22mm has much less distortion than any wide zoom I've tested"
- "There is moderate barrel distortion at 10mm, a negligible amount at 15mm, and only a tiny amount of pincushion distortion at 22mm. Overall, exemplary performance in this measure."
- "This lens is small, light and solidly built. Sometimes Canon's non-L series lenses can feel a bit cheap, but not this one. … there is little to fault about it with regard to either fit or finish."
Cost is the biggest criticism; the 10–22 costs as much as many L-series lenses, but is only usable on EF-S cameras, and thus is questionable as a long-term investment. Others think this less of a concern.
Filters exacerbate vignetting, hence thin filters are recommended at 10mm, and stacking filters is discouraged.
Similar lenses 
The Nikon 12–24 DX is Nikon's ultra-wide angle zoom for its APS-C sensors (which are slightly larger than those of Canon), and is earlier, but is more expensive, not as wide, and has more barrel distortion.
Some consider the Tokina 12–24 to be comparable and cheaper, while others consider the Canon 10–22 to be significantly superior. In May 2008, "PhotoZone" considered the Tokina 11-16mm, f/2.8, introduced in 2008, to be the best ultra-wide angle lens available for Canon APS-C Format cameras. Noted photography blogger Ken Rockwell, however, considers the Canon 10–22 to be better than either version of the Tokina 11–16—the original reviewed by PhotoZone, or the Mark II released in 2012—for Canon shooters.
- Canon Inc.. "EF-S 10-22mm f/3.5-4.5 USM". Canon Camera Museum. Retrieved 31 May 2007.
- Atkins, Bob. "Canon EF-S 10-22/3.5-4.5 USM Lens Review". photo.net. Retrieved 9 March 2008.
- "Canon EF-S 10-22mm f/3.5-4.5 USM". The Luminous Landscape. Retrieved 9 March 2008.
- Rockwell, Ken. "Canon 10-22mm". KenRockwell.com. Retrieved 9 March 2008.
- Andrews, Ian. "Canon EF-S 10-22mm f/3.5-4.5 USM". photodo.
- "Canon EF-S 10-22mm f/3.5-4.5 USM". SLRgear.com. Retrieved 9 March 2008.
- Rockwell, Ken. "Nikon 12-24mm f/4". KenRockwell.com. Retrieved 9 March 2008.
- "Canon EF-S 10-22mm f/3.5-4.5 USM – Test Report / Review". photozone.de. Retrieved 9 March 2008.
- "Tokina AF 11-16mm f/2.8 AT-X Pro DX (Canon) – Review / Lens Test Report". photozone. Retrieved 15 July 2008.
- Rockwell, Ken (September 2012). "Tokina 11-16mm: Recommendations". KenRockwell.com. Retrieved March 15, 2013. "If you shoot Canon, get the Canon 10-22mm, since it doesn't cost much more and has a much wider and longer zoom range. I have not compared its sharpness, however the Canon's distortion control is superior."
- Rockwell, Ken (September 2012). "Tokina 11-16mm f/2.8 II: Compared". KenRockwell.com. Retrieved March 15, 2013. "Canon's [10–22mm] lens is wonderful, and seeing how it sells for about the same price, I'd get the Canon lens for Canon."
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