The 85mm f/1.4 DG DN lens for Sony E is a portrait-length full-frame lens from Sigma's Art-series that works with the E-mount mirrorless cameras. As a member of the Art line of lenses, this piece performs really well optically, has a bright aperture and is sleek in design.Despite being designed for use with full-frame cameras, the Sigma 85mm DG DN Lens can also be used with the APS-C models for a 127.5mm equivalent focal length. The f/1.4 maximum aperture also provides for control over the depth of field thus enabling it's user to isolate the subject matter with selective focus.