The 56mm f/1.4 DC DN is part of Sigma's Contemporary series of lenses and is designed for use with APS-C-format Sony E-mount mirrorless cameras. The lens is characterized by its bright f/1.4 maximum aperture, which suits working in difficult lighting conditions and also offers improved control over depth of field for isolating subjects and working with selective focus techniques. The optical design utilizes two aspherical elements and one SLD element, which help to reduce both spherical and chromatic aberrations for greater sharpness and clarity. A Super Multi-Layer Coating has also been applied to suppress flare and ghosting in order to achieve more contrast and color accuracy when working in strong lighting conditions.  The portrait-length prime is designed for APS-C-format Sony E-mount mirrorless cameras and provides an 84mm equivalent focal length. Two aspherical elements are used to limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering. A stepping AF motor benefits both photographers and videographers with its fast, precise, and near-silent performance.