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, full-frame EOS DSLRs, and any video-capable camera that accepts EF-mount lenses.The aperture is a fast T1.3 that 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, super-smooth, and fully manual, even when used with a DSLR, offering an evermore accurate handle.

The CN-E 50 was released with two complementary relatives, the CN-E 24mm and CN-E 85mm. All three lenses share the same front diameter, form factor, optical design, placement of gear rings, and mechanical construction. Because of the identical characteristics, one lens can be swapped with another easily, even when geared accessories are involved.
Application
Canon EF mount for Canon EOS C300 and Canon full-frame EOS DSLRs
Focal Length
50 mm fixed focal length
Maximum Aperture
1:1.3
Diaphragm Blades
11 blades
Angle of View
1.5:1 / 1.4 x .94" (36 x 24 mm): 39.6deg. x 27.0deg.
1.78:1 / .96 x .54" (24.4 x 13.8 mm): 27.6deg. x 15.7deg.
Minimum Object Distance
From image sensor: 18" (45.7 cm)
Object Dimensions at M.O.D.
1.5:1 / 1.4 x .94" (36 x 24 mm): 9.8 x 6.4" (24.9 x 16.3 cm)
1.78:1 / .96 x .54" (24.3 x 13.8 mm): 6.69 x 3.7" (17 x 9.4 cm)
Front Lens Diameter
4.48" (114 mm)
Dimensions
4.66 x 4.66 x 4" (11.8 x 11.8 x 10.16 cm)
Weight
2.43 lbs (1.1 kg)
Specifications
Features: New
Brand: Canon
Manufacturer Part Number: 6570B001
Manufacturer: Canon, Inc
Warranty
Warranty length: 1 Years