From ultra-wide angle zoom on full-frame cameras or a standard zoom on DSLR's with APS-C sensors, on which this lens delivers 28-70mm equivalent.
Maintaining a f/4 maximum aperture means there is no need to vary shutter speed or ISO as you zoom.
Super Spectra coating on the elements ensures colour balance and minimises ghosting and flare to ensure you'll be proud of your image quality.
L-series is Canon's flagship professional lens range and EF 17-40mm f/4L USM delivers with its precision-designed EF optics.
Check out some of our Summer Highlights from this weeks #CanonChallenge.
We asked photographer Serena Ho to create her own #CanonChallenge, and she delivered the goods.
If you’re a professional shooter and have a personal project you’ve dreamt about bringing to life, now could be the time to make it happen.
Jason Grant reveals how to find your decorating style in images.
Let your photos tell a story with wall art tips from Jason Grant.
Discover how to use your photography to make your child's room their own special space.
Join us on this walk down memory lane, as we review some of our community's favourite shots from our 2016 Facebook wall.
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