The Canon Cinema Prime Cn-E24mm T1.5 L F Lens is a 24mm wide-angle fixed focal length lens designed for cine-applications. It comes in Canon's Ef mount and is for use with Canon's Eos C300 and with full-frame Eos Dslrs.The lens is based on Canon's Ef 24mm f/1.4L Ii and is optimized for cine-use with upgraded optics and coating and a completely redesigned mechanical construction. A fast 1.5 aperture achieves superb quality in low light and a rounded 11-blade diaphragm along with the fast aperture produce strong bokeh and circular highlights. The diaphragm ring is stepless, super-smooth and totally manual, even when used with a DSLR, offering detailed handle. The lens features sharp optics capable of supporting even 4K recording quality.The Cn-e 24 was released with two complementary relatives - the Cn-e 50mm and Cn-e 85mm. All three lenses share the same front diameter, form factor, optical design, placement of gear rings and mechanical construction.