B+W 82mm XS-Pro Digital ND Vario MRC-Nano Filter 66-1075252 B&H
Amazon.com : B + W 77mm UV Protection Filter (010) for Camera Lens - Xtra Slim Mount (XS-PRO), MRC Nano, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 77 mm, Clear Protector :