Samyang Xeen 50mm T1.5 (Canon EF, Meter)Rokinon's Xeen 50mm T1. 5 Lens for Canon EF Mount is built specifically for use as a cinema lens, and is not a modified still lens. It features an internal focus design so that the lens does not change size while focusing, minimizing breathing. Each lens in the Rokinon Xeen cinema lens set is multi coated for good contrast, glare prevention, and are color matched to a factory standard, allowing you to assemble a set over time with minimal color shift.