Features an aluminum body for increased durability, a tripod mount, large & easy to read markings, and a long focus throw (200 Degree) Unified focus, aperture gear and T-stop scale positions among all Xeen by Samyang lenses Xeen by Samyang lenses all have a 11 bladed diaphragm & unified 114 mm front diameters for use with standard matte boxes. 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. Best of all, they are affordable and are often half the price of comparable pro cine lenses!