The Rokinon 85mm F/1.4 Canon RF mount telephoto lens is the first 85mm prime lens with precision manual focus control to be available in Canon RF mount. It sports a new exterior design with a contemporary look that matches and handles well with Canon’s full frame mirrorless cameras. Reduces Chromatic Aberrations. This portrait length tele offers a very fast F1.4 maximum aperture for effective low light shooting, fast shutter speed capture, and precise selective focus control. Its optical design consists of 9 Ultra Multi-Coated elements in 7 groups including one Hybrid-Aspherical element to reduce chromatic aberrations for increased clarity and sharpness. Features. Numerous features include a metal chassis, weather sealing, a slip resistant matte finished aperture control ring, and a removable lens hood. The curved blade diaphragm provides pleasing bokeh while the non-rotating 72mm filter mount enables easy use of polarizing and other filters that require precise positioning.