Canon EF 17-40mm F/4 L USM (Canon Warranty)
CANON ULTRA WIDE ANGLE ZOOM LENS
- It has a constant f / 4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters
- it offers weather-resistant construction similar to other high-end L-series lenses
A new and affordable L-series ultra-wide-angle zoom lens thats 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. This lens focuses as close as 11 inches (0.28m) , and offers both Canons full-time manual focus and a powerful ring-type USM for fast and silent AF.