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. Ultra wide-angle lens for the EOS 20D or Digital Rebel*. The 10-22mm lens has a 35mm equivalent 16-35mm zoom range, and keeps the same compact size throught the focal range. * EF-S Lenses are compatible with the 20D and Digital Rebel only Specifications: Close-focusing to 9.5 -- fill the frame with subjects as small as 3.6 x 5.4 Lens Size: 3.3 x 3.5 Filer Size: 77mm Weight: 13.6 oz. More details about product EF-S 10-22mm f/3.5-4.5 USM Lens
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