EF Mount Lens Aperture Range: f/1.4-22 Two High Refraction Lens Elements Gaussian Optics Eliminate Astigmatism Ultrasonic Autofocus Motor Manual Focus Override Infrared Index Minimum Focus Distance: 17.8″ Filter Thread Diameter: 58mm
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Standard focal length 50mm lens is effective in a multitude of shooting situations and ideal for day-to-day shooting
Elements/Groups: 7/6; Diaphragm: Blades 8; Filter Thread: Font 58mm; An f/1.4 maximum aperture provides clear imaging in low light situations and shallow depth of field
Ultrasonic autofocus motor (USM) operation is fast, smooth and virtually silent
Two high-refraction lens elements and new Gaussian optics eliminate astigmatism and suppress astigmatic difference