Sigma 35mm F/1.4 DG HSM Art lens is ideal to take yo ur artistic expression to the next level. Designed for full frame cameras and also can be used with APS-C sensors too. This lens features a unique lens concept and design. Includes Hyper Sonic Motor (HSM) technology, floating internal focussing system, SLD and FLD Glass elements. While the HSM is used for quiet, high speed and accurate autofocusing, the floating focusing system makes sure superior optical performance with subjects at closer shooting distance. Both the axial and chromatic aberration are corrected by SLD glass elements along with FLD glass elements which both are equal to fluorite. Its ideal in low-light because of its large aperture 1.4 and is compatible with Sigma USB dock and Pro optimization software to adjust and fine tune focusing parameters.