Canon Ef17-40mm f/4.0 L Usm Lens

Canon Ef17-40mm f/4.0 L Usm Lens The EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion. Features Superb optical performance throughout the zoom range Fast autofocus speed Highly resistant to dust and moisture 28cm minimum focusing distance at all focal lengths A high-quality, wide-angle zoom for a variety of subjects. Ultra-wide or standard zoom The EF 17-40mm f/4L USM acts as an ultra-wide angle zoom on film or full-frame digital EOS cameras. On DSLRs equipped with APS-C sized sensors it acts as a standard zoom, giving an angle of view equivalent to a 28-70mm lens on a full-frame camera.