Canon's original APS-C ultra-wide zoom, a quality option before cheaper alternatives arrived.
The Canon EF-S 10-22mm f/3.5-4.5 USM was launched in 2004 as Canon's first ultra-wide zoom for APS-C DSLRs. Covering a 16-35mm equivalent range, it was the only Canon option for wide-angle APS-C photography for a decade. Ring USM autofocus and good optics made it a solid choice for landscapes and architecture.
Optical quality is good with sharp centre performance and well-controlled distortion for an ultra-wide. The faster f/3.5-4.5 aperture lets in more light than the later EF-S 10-18mm IS STM. Ring USM provides fast, silent autofocus with full-time manual override. Build is solid plastic.
Canon EF-S mount only, 77mm filter thread. The EF-S 10-18mm f/4.5-5.6 IS STM succeeded it with IS and an STM motor at a lower price but with a slower aperture. The 10-22mm retains the advantage of a faster aperture and USM motor.
Moderate value used. Check USM motor and zoom ring smoothness. The 10-18mm IS STM is cheaper and has IS but is slower. The 10-22mm is the better lens for photographers who value the faster aperture and don't need IS. Still respected for its optical quality.