The SIGMA 16mm F1.4 DC DN is the world's first interchangeable lens for mirrorless Sony E-Mount cameras with sensors in APS-C format. It offers a focal length of 24mm at 35mm KB format and a speed of F1.4. In the Micro-Four-Thirds mount, the lens's image angle corresponds to that of a 32mm focal length lens in 35mm KB format, and it also offers the F1.4 aperture value. It is the wide-angle lens with high light intensity that photographers have been waiting for with non-reflecting cameras. The DN lenses for mirror-less cameras feature a lightweight, compact body designed for everyday use that offers superior performance in all major focal lengths. The 16mm F1.4 DC DN Contemporary builds on the success of the 30mm F1.4 DC DN, which SIGMA launched in 2016 as the first lens in a new series of fixed focal lengths for mirror-less cameras. It also combines the luminous intensity of F1.4 with optical peak performance. The 16mm F1.4 DC DN, which is based on the same development concept as the SIGMA 30mm F1.4 DC DN, has a lens construction of 16 elements in 13 groups and is made of high-quality materials. This lens effectively minimizes optical aberrations and delivers excellent resolution even at wide open apertures and across the entire aperture range. The lens construction and the stepper motor provide a smooth autofocus even with video recordings and the connection is protected against dust and splash water by a seal.