The Canon EF 50mm f/1.2 L USM belongs to Canon's range of professional optics. It is extremely bright with a maximum aperture of f/1.2. On the program, we find a fairly simple optical formula, based on the combination of 8 lenses divided into 6 groups, as well as the Super Spectra treatment. The lens incorporates a USM motor and a circular diaphragm with 9 blades.