Canon RF 50mm F1.2 L USM. Lens structure (elements/groups): 15/9, Lens type: Telephoto lens, Closest focusing distance: 15.7" (0.4 m). Camera brands compatibility: Canon, Lens coating features: Fluorine coating. Market segment: Professional, Product color: Black. Diameter: 3.54" (8.98 cm), Filter size: 3.03" (77 mm), Length: 4.25" (108 mm)