Canon EF 17-40mm f/4L USM

Canon EF 17-40mm f/4L USM Prices, product details, cost, comparisons, online deals, features, photos, buy from Australia
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 11 inches (0.28m), 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/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. Finally, it offers weather-resistant construction similar to other high-end L-series lenses Features Optimized for Digital Imaging High Speed Rear Focusing Close Focusing to 11 inches Non Rotating Front Element Rear Gel Filter Holder Shorter and about 35% lighter than 16-35 f/2.8 L-Series Lens Specifications Construction 9 groups /12 elements Angle of view 104° - 57° F stop range 4-22 Closest Focusing Distance 0.28m / 0.9 ft. Maximum Magnification 0.24 (at 40mm) Filter Size 77mm Dimensions (Length x Diameter) 3.3" x 3.8" / 83.5mm x 96.8mm, Weight 500g , 17.6 oz.