Canon EF 17-40mm f/4L USM Lens

 

 

Product Features

  • 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
  • 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
  • Weather-resistant construction; measures 3.3 inches in diameter; 1-year warranty

Technical Details

  • all-glass-optical