Key Features E-Mount Lens/APS-C Format 45mm (35mm Equivalent) Aperture Range: f/1.4 to f/16 Two Aspherical Elements A fast, versatile prime, this 30mm f/1.4 DC DN Contemporary Lens from Sigma is designed for use with APS-C-format Sony E-mount mirrorless cameras. The bright f/1.4 maximum aperture benefits working in low-light conditions and also affords extensive control over depth of field for using selective focus techniques.