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Product Description
A wide-to-standard zoom lens designed for APS-C DSLRs, the Sigma 17–50mm F2.8 EX DC OS HSM features a large f2.8 maximum aperture and an OS (optical stabilizer) function for better handheld shooting. The HSM (hyper-sonic motor) ensures quick, accurate, and consistent autofocusing, while the FLD glass elements—together with two glass mold elements and one hybrid aspherical lens—correct aberration for excellent sharpness and contrast Read More