Xeen by Samyang 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 114 mm. Xeen by Samyang lenses are all compatible with full frame cameras and are available Canon EF mount. All include a 2 year warranty. Best of all, they are affordable and are often half the price of comparable pro cine lenses!