Sigma introduced the Art version of its 24-70mm f/2.8 lens in February 2017, bringing with it the familiar-looking exterior design with a mix of metal and “thermally stable composite” material, along with rubber sealing around the mount. Internally, Sigma says they’ve updated the optical construction to meet the demands of ultra-high-megapixel cameras. It has 19 []
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The Sigma 17-50mm f/2.8 EX DC OS HSM lens features a wide-range zoom lens, specially designed for APS-C format SLRs. Its constant f/2.8 aperture enables you to shoot high-quality photos and videos in dim light conditions. The optical design of the Sigma 17-50mm f/2.8 EX DC OS HSM Lens includes a couple of low-dispersion elements with the trio of aspherical elements. It is how it reduces aberrations while promoting sharpness and clarity. It covers a versatile range of 25.5-75 mm focal length.
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