Canon 20mm f/2.8 EF USM
Rating: Ed: -, User: - (normalized, 0=useless, 50=average, 100=excellent).
Mount: Canon EF.
Aperture range: f/2.8 to f/22.
Close focus distance (CFD): 25 cm / 0.82 ft (from sensor plane).
CFD magnification: 1:7.1 / 0.14X.
Focus: AF (built-in, unknown type).
Filter diameter: 72 mm.
L x D, W: 71 x 78 mm, 405 g.
IR: Poor IR performance.
Approximate street price: USD 470 (new, w/o tax).
Canon is a multinational corporation headquartered in Tokyo, Japan specializing in the manufacture of imaging and optical products. Its products including cameras, lenses, flash units, scanners, photocopiers, printers and steppers (used in semiconductor fabrication). The company was founded in 1937 as Precision Optical Instruments Laboratory and renamed Canon Inc. in 1947.