Key Features E-Mount Lens/APS-C Format 84mm (35mm Equivalent) Aperture Range: f/1.4 to f/16 One SLD Element, Two Aspherical Elements An especially sleek portrait-length prime, 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