Buy & Sell Listing - Want to BuySelling WTB small square Wratten ND 3.0 filter Location NC, USA Description I want to do some long exposure photos with a Rokinon fisheye, and the easiest way to add an ND filter seems to be tacking a gel filter to the back of the lens (I may eventually add the Panasonic 8mm filter holder if results are good...). I've tried some 4-stop ND gel filters intended for lighting applications with mixed results, and still need to reduce light beyond 4 stops. Film/gel type ND filters are not that easy to find, and expensive when you do find them. I'd like to try a proper 10-stop gel before springing for a full piece... Does anyone have high density wratten ND filter stock they would be willing to part with a small piece of? Offering Negotiable References Here; eBay: 4153r Acknowledgment I have read and agree to the Buy and Sell rules.