Angle of view (Horizontal): 40, Angle of view (Vertical): 27, Angle of view (Diagonal): 46, Lens construction (elements/groups): 15/9, No. of diaphragm blades: 10, Minimum aperture: f/1.2, Closest focusing distance: 0.4m, Maximum magnification: 0.19x. The large diameter RF50mm F1.2 L USM lens for the EOS R system delivers unparalleled optical performance in a standard focal length for sharp portraits.