The Rokinon 10mm T/3.1 Cine Manual Focus Wide Angle Lens has been developed primarily for professional cine / movie making purposes. It features a De-clicked Aperture to reduce noise while shooting. This lens is follow-focus compatible to provide a convenient quick and precise method for controlling the focus on your camera. The lens has an 8-bladed aperture and optical construction is comprised of 14 elements divided into 9 optical groups with two aspherical lens element and one ED glass element. Multi-coated glass allows for a high level of light transmission and it minimizes flare and ghosting.