Sigma 30mm f/1.4 DC DN Contemporary Lens for Canon EF-M with Accessory BundleCanon EF M mount mirrorless camera owners who are in the market for a compact prime lens that produces brilliant images and crisp video will appreciate the performance of the Sigma 30mm f 1. 4 Contemporary DC DN Prime Lens. Not only does this lens capture bright and compelling photos, it also helps you achieve silky smooth, dramatic bokeh image effects. Designed for Versatility Sporting a focal length of 30mm, a large light gathering aperture of f 1.