B08BQV8RD6 Breakthrough Filters ND6 150mm Square Neutral Density Filters with Foam Light Sealing Gaskets for Square Filter Holders

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World’s Sharpest and most colour neutral ND. 100% Guaranteed
World’s First Tempered Square Filter.
16 MRC layers create a protective layer structurally harder than the glass
Nanotec(R) Coatings repel dirt and moisture
Individual colour coded protective diamond case