17-40mm ultra-wide-angle zoom lens with f/4 maximum aperture for Canon SLR cameras
3 aspherical lens elements and super UD glass element create superior optics in all conditions, Closest focusing distance : 0.9 feet
Powerful ring-type ultra-sonic monitor (USM) produces fast and silent autofocusing, Focuses as close as 11 inches; supports screw-in 77mm filters or up to 3 gel filters
Suitable for Wedding/Nature Photography, Weather-resistant construction; measures 3.3 inches in diameter; 1-year warranty
Purchase this product between May 1, 2016 and July 30, 2016 and get 13 months of free damage protection from Canon. The product must be registered within 30 days of the purchase date to be eligible.
Video Review Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras
Due to popular demand: we look at this much-loved L lens(http://bit.ly/EF17-40mm). Here's our video review on this wide-angle zoom with a red ring on it. Pricing ...
Canon 'L' lenses have a reputation for extremely high picture quality - but what about older designs? The Canon 17-40mm f/4 'L' is clearly a great ultra wide ...
Do you really need image stabilisation in an ultra-wide angle lens? Canon seems to think so. We take a look at the new 16-35mm f/4L IS USM ...
In a galaxy not so far away...a comparison of Canon's Ultra Wide Angle Zoom L lenses - 16-35 f/2.8L(http://bit.ly/16-35f28), 16-35 f/4 IS L(http://bit.ly/16-35f4) and ...
