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. The EF 70-300mm f/4-5.6 IS USM telephoto zoom lens has been developed to meet the high-performance standards that todays photographers demand. Improved Image Stabilizer Technology provides up to three stops of shake correction, and the Mode 2 option stabilizes images while panning with a moving subject. Compared to the original Canon EF 75-300mm IS zoom lens, this telephoto lens has faster autofocus, and overall the lens is lighter and has a smaller diameter than the original. The zoom ring can be locked at the 70mm position, making this powerful lens easy to transport, too. Lens hood ET-65B not included. Specifications: Focal Length: 70-300mm Maximum Aperture: f/4-5.6 Lens Construction: 15 elements in 10 groups Diagonal Angle of View: 84 - 23 20 (with full-frame camera) Focus Adjustment: front-focusing method with helicoid ring drive Closest Focusing Distance: 4.9 ft./1.5m Zoom System: 6-group helical zoom (rotational angle: 84) Filter Size: 58mm Optional Lens Shade: ET-65B Maximum Diameter x Length: 3 x 5.6 (76.5mm x 142.8mm) Weight: 22 oz. (630g) (lens only) More details about product EF 70-300mm f/4-5.6 IS USM Telephoto Lens
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