Sigma 23mm f/1.4 DC DN Contemporary Overview A fast-aperture wide-angle prime for APS-C-format mirrorless cameras, the Sigma 23mm f/1.4 DC DN Contemporary Lens provides a field of view equivalent to 35mm on a full-frame camera. Offered here with a Sony E-mount, this lens delivers high resolution along with beautiful bokeh effects thanks to its large f/1.4 maximum aperture. An inner focus system with a stepping motor delivers fast and accurate autofocus for still and video use, and with a minimum focusing distance of 9.9′′ the lens is well-suited for close-up photography and portraiture. Prime wide-angle lens is designed for APS-C-format Sony E-mount mirrorless cameras and provides a 35mm equivalent focal length. Bright f/1.4 maximum aperture with 9-blade diaphragm benefits working in difficult lighting conditions, offering greater control over depth of field and generous bokeh effects. Thirteen elements in 10 groups, including 3 SLD glass elements and 2 aspherical lens elements, to achieve sharp, clear images. Inner focus system with stepping motor for fast, reliable AF for both still and video use. Compatible with AF assist function and lens aberration correction on supported cameras. Compatible with lens based optical correction when used with supported cameras. Minimum focusing distance of 9.9′′ allowing for unique close-up photographs and portraits. Dust and splash-resistant construction with a brass bayonet mount for ensured accuracy and durability.