Kit
Senior Member
95mm filter size + extreme wide angle lens = going to be difficult to find a proper C-PL filter for it, in fact any filter at all without vignetting
I am using the Zeiss 95mm UV filter. No vignetting I can see but I shoot mostly with f/11. Zeiss also makes a 95mm circular polariser. Large filters are not difficult to get. You have to pay a premium for the good ones though.