Canon EF 17-40mm f/4L USM Ultra Wide Zoom Lens - f/4 8806A002

A new and affordable L-series ultra-wide-angle zoom lens that''s ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. It offers weather-resistant construction similar to other high-end L-series lenses.