Wanderer2 wrote:
B+W, Marumi, and top of the line Hoya are all excellent. At different times I have used all three and all performed very well and are of excellent build quality. The website LensTip has done comparative reviews of circular polarizers and rated these three brands at the top of the rankings.
Was surprised no one mentioned Marumi till now. Their thin one is excellent.
Thin is needed for ultra wide angle; about 14 mm on full frame, to not see the filter in the frame.