Specifications:

Brand Canon
Focal Length 50mm
Aperture Maximum: f/1.2
Minimum: f/16
Camera Mount Type Canon EF
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Angle of View 46°
Minimum Focus Distance 1.48′ (45 cm)
Magnification 0.15x
Maximum Reproduction Ratio 1:6.6
Optical Design 8 Elements in 6 Groups
Diaphragm Blades 8, Rounded
Autofocus Yes
Filter Thread Front: 72 mm
Dimensions (DxL) Approx. 3.38 x 2.58″ (85.8 x 65.5 mm)
Weight 1.28 lb (580 g)
Package Weight 1 kg
Box Dimensions (LxWxH) 6.0 x 5.4 x 5.2″

Features:

Normal-length prime is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides an 80mm equivalent focal length.

Exceptionally bright f/1.2 maximum aperture affords extensive control over depth of field for selective focus applications and also benefits working in low-light situations.

One aspherical element helps to suppress spherical aberrations and distortion for a high degree of sharpness and accurate rendering.

Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.

A ring-type Ultrasonic Motor (USM), along with optimized focusing algorithms and a high-speed CPU, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.

Rounded eight-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.

As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.