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I have experience with this lens compared to Sony DT 35mm F18 SAM Sony DT 1650 SSM Sony DT mm F3556 SAM Sigma 50mm F14 EX DG HSM Sigma 85mm F14 EX DG HSM price paid na positive sharp lens even wide open high quality buid feeling internal focus and zoom autofocus spot on negative weight (felt frontheavy on my a77ii)Photographers who like to keep up with the news will undoubtedly have heard of this completely new, unique lens A zoom lens with a maximum aperture of f/18Sigma 15mm f/18 Overview The Sony Amount Sigma 15mm f/18 DC HSM Art Lens is a wideangle to normallength zoom that features a fast, bright constant f/18 maximum aperture It is specifically designed for use with APSCsized sensors and provides a 35mmequivalent focal length range of mm Sigma 18 35mm F 1 8 Dc Hsm Lens Announced Price Specs Where To Buy Camera News At Cameraegg Sigma 18-35mm f1.8 art dc hsm lens for sony