Square Filter ND8(3 Stops) 100x100mm Square Filter with Protective Frame, Waterproof ND Neutral Density Filter Light Reduction Filter made of HD Optical Glass, Nano-Xcel Pro Series
SKU: SKU.1872
A
There are coatings on both sides, and the middle is transparent.
A
They fit all filter holders that don't have to have an additional seal glued to the filters. I use it myself with the Rollei Mark II filter holder and the Haida M10.