The Canon CN-E 50mm T1.3 L F Cine Lens is an EF-mount standard-width lens for Canon’s C-series cinema cameras, for full-frame EOS DSLRs, and for any video-capable cameras that accept EF-mount lenses. The aperture is a fast 1.3 and lets you get superior shots in low light. The diaphragm is made up of 11-blades and is as round as can be, and along with the fast aperture it can produce impressive bokeh and beautiful circular highlights. The diaphragm ring is stepless, is super-smooth, and is fully manual, even when used with a DSLR, offering evermore accurate handle.