Canon EF Autofocus Lenses Canons reputation for excellence in optics has been well established for years. And with the introduction of EF lenses for the EOS, its only getting better. EF Lenses have the largest diameter mount of any 35mm camera, which not only strengthens the whole system, but permits optical innovations never before possible. L-Series lenses have better sharpness and contrast because Canon uses aspherical elements to eliminate spherical aberrations. In addition, the L-Series telephotos use UD (Ultra-low Dispersion) glass to reduce chromatic aberration resulting in more accurate colors. A built-in Ultrasonic focusing Motor (indicated by USM) provides pro-quality AF speed with split-second accuracy. Highly portable lens with high optical performance and light weight of 12 oz. (340 g). A very practical ultra-wide-angle zoom. The large front lens group minimizes peripheral darkening, and the flare-blocking diaphragm minimizes flare. Also, with lens group 2 being the zoom group, distortion is corrected. Item Specifications: Product Description: Canon EF wide-angle zoom lens - 20 mm - 35 mm Lens System: Wide-angle zoom lens Mounting Type: Canon EF Lens Aperture: F/3.5-4.5 Focal Length: 20 mm - 35 mm Optical Zoom: 1.7 x Min Focus Range: 13.4 in Focus Adjustment: Automatic, manual Lens Construction: 11 group(s) / 12 element(s) Special Functions: Wide angle, zoom Filter Size: 77 mm Length: 3 in Weight: 12 oz More details about product EOS EF 20-35mm f/3.5-4.5 USM Zoom Lens (77Ø)
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