77mm Pro series Multi-Coated High Resolution Digital Ultraviolet Filter For Sigma 10-20mm f/4-5.6 EX DC HSM Autofocus Lens, Sigma Normal 50mm f/1.4 EX DG HSM Autofocus Lens, Sigma 70-200mm f/2.8 EX DG APO OS HSM This ultimate clear uv filter will not affect color balance. It protects lenses from expensive front element damage Reduces lens flare and ghosting Microfiber Cloth 77mm HD Filter