The Canon EF 17-40mm f/4L USM is a wide-angle zoom lens that is very capable on full frame and crop sensors (equivalent focal length 27-64mm), extremely solid and built for everyday wide-angle use. If wide-angle is your thing, then this zoom will give you great quality across its focal range. Design The Canon EF 17-40mm
Go Wide with the Canon EF 17-40mm f/4L USM
