I just got a new to me used lens (Sigma 17-50 OS) and I know I'm going to want a CPL to use with it. I'm looking at several used ones, but have no clue which ones are good and which ones to avoid. Also, manufacturers like Hoya have several different offerings, and I don't know which ones are better. Advice from the experts will be much appreciated.
Some of the ones I'm looking at are Hoya CIR-PL, Hoya Alpha, Hoya Ultra, Hoya EVO, and Marumi DHG.