The Sigma 50-200mm F4-5.6 DC OS HSM is a telephoto zoom lens designed for smaller chip APS-c cameras only. Stigma's Optical Stabilization System allows handheld photography even in low-light conditions. Its Hyper-Sonic Motor has been developed for a quiet and high-speed auto focus. With a minimum focus distance of 43 inches, and a maximum magnification ratio of 1:4.5, this lens is still fairly compact, at 4 inches long, and weighing only 15 ounces.
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