“ Just looking at your review of the Nikon 200mm f2 AF-S. Nikon manufacture a special CP-L filter assembly for this lens. The part number should be C-PL-1L ( pls check with Nikon to confirm). I have the C-PL-1L for my Nikon 300mm f2.8 AF-S lens. This enables you to adjust the polariser externally to get the best result ”