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EF 17-40mm f/4L USM
The affordable L-series EF 17-40mm f/4L USM is an ultra-wide-angle zoom lens that’s ideal for both film and digital SLR cameras. You will get superior optics due to the use of three Aspherical lens elements along with a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for digital cameras.
The EF 17-40mm f/4L USM provides both Canon’s full-time manual focus and ring-type USM for fast and silent Autofocus and can focus as close as 11 inches (0.28m). It comes with constant f/4 maximum aperture, and also offers the choice of a rear lens holder for up to three gel filters or screw-in 77mm filters. Similar to other high end L-series lenses, the EF 17-40mm f/4L USM has weather-resistant construction.
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Topics: Ultra Wide Zoom |