82mm Pro series Multi-Coated High Resolution Digital Ultraviolet Filter For Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF Autofocus, Sigma 24-70mm f/2.8 IF EX DG HSM Autofocus Lens, Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens 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 82mm HD Filter