The 35mm f/1.4 DG HSM is Sigma's first large aperture 35mm full-frame lens. It was announced November 2012 and goes head-to-head against the equivalent offerings from Nikon, Canon and Sony.
Outstanding performance in the corners of a high-resolution full-frame sensor even wide open; Good build quality; Quiet and fast AF operation; Relatively low price compared to the big names
Performance at the borders/corners of the DX/APS-C image circle could be better; No weather sealing