For natural looking perspective in landscape photography, portraiture and snapshots, this large-aperture, medium telephoto lens is ideal, and easily portable. Equipped with a rear focusing optical system perfect for medium telephoto lenses, this lens compensates for all types of aberration, delivering outstanding image performance that is sharp and clear, even at maximum aperture. Designed with portrait photography in mind, a great deal of thought went into the natural, soft blur effect. The lens delivers quick, quiet USM autofocusing as well as smooth full-time manual focus. As with the EF85mm f/1.8 USM, the lens's operability is outstanding, with a constant lens length as well as a wide manual focus ring and non-rotating filter and hood mounts.