Canon RF 50mm f/1.2 L USM LensThe RF 50mm f 1. 2L USM from Canon is highly sought after due to its versatile focal length and bright f 1. 2 maximum aperture. This lens excels in difficult lighting conditions and working with shallow depth of field and selective focus techniques. Lens Construction 15 elements in 9 groups and Diagonal Angle of View 46 Degrees. Features: RF Mount Lens Full Frame Format Aperture Range: f 1. 2 to f 16 One UD Element, One Aspherical Element Ring Type