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Canon EF 17-40mm f/4L sample images

17-40mm

This Canon EF 17-40mm f/4L is ideal for both film and digital SLRs. On the other side, the lens is equipped with the Superior optics including three Aspherical lens elements and in addition to a Super UD (Ultra-low Dispersion) glass element, plus it also offers both Canon’s full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture and

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