Canon EF 17-40mm F4 L Lens

Canon EF 17-40mm F4 L Lens

An 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. This lens focuses as close as 28cm, and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/

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