100*150*2mm Soft GND8 Square Filter HD Optical Glass Waterproof ND Filter - X-PRO Series
SKU: SKU.1810
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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.
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It fits exactly. The width is crucial, so with 100mm width it fits.
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There are coatings on both sides, and the middle is transparent.
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Yes. The filters are also very high quality, I can only recommend them, the price-performance ratio is great!