Crop sensor Canon only - 500D - 550D - 40D - 50D - 7D
This exciting new zoom lens provides ultra wide-angle coverage to the EOS 400~450~40~50D Digital Cameras. Equivalent to a 16-35mm zoom, it offers excellent performance and optics designed from the ground-up for digital SLR use. Three Aspherical lens elements, plus a Super-UD element, assure image quality.
Ring-type USM means fast and silent AF along with full-time manual focus. It focuses as close as 9.5 inches.
Read more - Canon Lens 10-22mm - merlin-photographics.co.uk
http://www.merlin-photographics.co.uk/#/canon-lens-ef-s-10-22mm/4533411316