EF50mm f/1.0L USM Specifications

Article ID: ART159963 | Date published: 06/09/2015 | Date last updated: 08/18/2015


EF50mm f/1.0L USM Specifications


EF50mm f/1.0L USM

Marketed September 1989
Lens Construction (group) 9
Lens Construction (element) 11
No. of Diaphragm Blades 8
Minimum Aperture 16
Closest Focusing Distance (m) 0.95
Maximum Magnification (x) 0.11
Filter Diameter (mm) 72
Maximum Diameter x Length (mm) 91.5 x 81.5
Weight (g) 985

An ultra-fast standard lens with the largest aperture for SLR lenses in the world at the time. Two large-diameter ground and polished glass aspherical lens elements (3rd & 8th) provide high-contrast with low-flare image quality even at maximum aperture. Curvature of field is minimized through use of four high-refraction glass elements. Spherical aberration and curvature of field at close focusing distance are minimized by floating mechanism. A ring USM (Ultrasonic Motor) achieves silent, high-speed AF and full-time manual focusing.



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