The Sigma 120-400/4.5-5.6 DG OS telephoto zoom lens incorporates Sigmaâ€™s original OS (Optical Stabilizer) function. It offers the equivalent of using a shutter speed approximately 4 stops faster. Three SLD (Special Low Dispersion) glass elements provide excellent correction for chromatic aberration. This lens is equipped with the rear focus system that minimizes fluctuation of aberration caused by focusing. It provides optimum image quality throughout the entire zoom range. The super multi-layer lens coating reduces flare and ghosting.
High image quality is assured throughout the entire zoom range. The minimum focusing distance of 150cm (59.1 inch) throughout the entire zoom range and has a maximum magnification of 1:4.2 make it useful for close-up photography. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focusing capability.
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