105mm HD MultiCoated UV Filter for Sigma 150-600mm F5-6.3 DG OS HSM | S 120-300mm F2.8 EX DG OS HSM 105mm Ultraviolet Filter, 105mm UV Filter, 105 mm UV Filter Look at your lens for the symbol  the number next to it is the filter thread size. 3-Layer Multi-Coating, Absorbs Ultraviolet Light General Protective Filter Low-Profile Aluminum Frame High-Transparency Optical Glass