The Sigma 16mm F1.4 DC DN | C is a great lightweight, fast-aperture wide prime for mirrorless cameras. Ideal for travel and documentary photography, this economical optic is a winner. For the photos in this article, it is paired with the Olympus OMD-E5, for a 32mm F1.4 equivalence. 1/2000 F2.2 ISO 200.