XEEN by ROKINON 16mm T2.6 Professional Cine Lens For Canon EF New Pro Xeen Line!! Xeen by Rokinon is a new line of professional cine lenses. They feature all the most important specifications of a professional cine lens. The lenses are housed in a durable aluminum housing, focusing & aperture gears are smooth and accurate, focusing throw is generous, and the front lens diameter is 114mm. Xeen by Rokinon lenses are all compatible with full frame cameras and are available Canon EF, Nikon, Sony FE, Micro Four Thirds, and PL mounts. All include a 3 year warranty.