Canon EF-S 10-22mm f/3.5-4.5 USM

The Canon EF-S 10-22mm f/3.5-4.5 USM provides a full-frame equivalent of 16-35mm because Canon APS-C DSLRs have a 1.6x crop factor. But this is only a 1mm difference from DSLRs with a 1.5x crop factor.

Canon EF-S 10-22mm f/3.5-4.5 USM

Canon EF-S 10-22mm f/3.5-4.5 USM

The lens is made up of 13 elements in 10 groups and features Super Spectra coatings designed to reduce ghosting and flare. AF is smooth and very quiet, and at only 385g this is one of the lightest wide-angle lens available. Even a few hundred grams can make a difference when you’re carrying it around all day!

This lens looks and feels good, with a solid build quality. The auto/manual focus switch is located conveniently on the left, and has a smooth action. The focus ring is positioned behind the zoom ring and is narrow, but being raised above the rest of the lens makes it very easy to turn. When zooming the internal elements move so the lens doesn’t extend out at the end, and the front element stays fixed rather than rotating.

Image quality is very good overall, with a sharp central area and impressive edge sharpness. At the wider end of the zoom there’s a consistent amount of chromatic aberration at the edges of the frame regardless of aperture selected, but this is easier to remedy than a lack of sharpness. At 10mm the lens does suffer from a small amount of barrel distortion. At 22mm there’s no perceptible distortion of this type though.


Canon’s ultra-wide offering is very impressive, with excellent edge sharpness for this type of lens. There is a small amount of chromatic aberration at the edges, but this can be easily fixed in RAW editing software such as Adobe Lightroom. At just 385g this is a light lens in the wide-angle group by quite a margin, and that’s a very important feature for landscape lenses.


  • Street price £377 (As of June 2016)
  • Full frame of APS-C: APS-C
  • Lens mount: Canon EF-S
  • Maximum aperture: f/3.5-4.5
  • Minimum aperture: f/22-27
  • Construction: 13 elements in 10 groups
  • Number of diaphragm blades: 6
  • Minimum focus: 24cm
  • Filter thread: 77mm
  • Weight: 385g
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his review was first published in the September 2012 issue of Digital Photo - download back issues here.