PRO 77mm Filter Kit + PRO 77 mm Tulip Lens Hood for Tokina AT-X Pro 11-16mm f/2.8 DX II - 77 mm Polarizing Filter, 77mm UV Filter, 77mm Florescent Filter & 77mm Flower Lens Shade Hood Filter Kit: 77mm Circular Polarizer (rotational), 77mm Ultraviolet Filter, 77mm Florescent Daylight Filter - HD Multi-Coated Low Dispersion Optical Glass - Aluminum Ring Fitted 77 mm Circular (Rotational) Tulip Lens Hood, Flower Lens Shade Fits Perfectly On To Lens - No Adapters Required Look at your lens for the symbol  usually on the front or under the lens cap (under the cap will just be a number) the number next to it is the filter thread size.