Canon RF 50mm f/1.2L USM LensDistinguished by its speed, the RF 50mm f 1. 2 L USM from Canon is a desirable normal length prime due to its versatile focal length and bright f 1. 2 maximum aperture. This fast design excels in difficult lighting conditions and also benefits working with shallow depth of field and selective focus techniques. The optical layout incorporates one UD element and one aspherical element, which help to reduce both chromatic and spherical aberrations in