Xeon 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. Xeon by Rokinon lenses are all compatible with full frame cameras and are available for Canon EF, Nikon, Sony FE, Micro Four Thirds, and PL mounts. All include a 3 year warranty. Best of all, they are affordable and are often half the price of comparable pro cine lenses!