Rokinon's Xeen 24mm T1.5 Lens for Canon EF Mount is built specifically for use as a cinema lens. It features an internal focus design so that the lens does not change size while focusing, this minimizes the appearance of breathing when changing focus. Each lens in the 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. This 24mm lens provides what is considered a wide angle of view on full-frame cameras, and a tighter angle of view on smaller formats.