With a large 1.4 aperture the Sigma 50mm f/1.4 ART DG HSM Lens is a pro level performer. A Hyper Sonic Motor (HSM) ensures quiet smooth and accurate autofocusing. This member of the Art Line delivers high-level artistic expression Special Low Dispersion (SLD) glass Super Multi-Layer coating and a minimum focusing distance of 0.4 in. (40cm) .
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