Sigma 56mm f/1.4 DC DN Contemporary Lens for Sony E-Mount Cameras BundleThe Sigma 56mm f 1. 4 DC DN Contemporary Lens smallest mid tele lens in its class with a large aperture of f 1. 4 offering an opportunity to experience the fun of shooting wide open. While retaining the compact, lightweight, and outstanding image quality concepts of the Contemporary line, thanks to Sigmas leading edge technology, this lens provides the amount of bokeh and admirable brightness expected from f 1. 4 lenses even in the mid tele range.