B07Z4BCCVB NiSi 4×5.65 Nano Infrared Neutral Density 2.1 (7-Stop) Glass Filter

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NiSi 4×5.65″ Nano Infrared Neutral Density 2.1 (7-Stop) Glass Filter – 4×5.65″ Protective Filter Case – 1 Year Warranty
Exclusive dual-sided Nano coating technology
4mm thick optical glass with precision cut, grinding, and polishing
Ultra low color shifting with anti-reflective coating
Water proof, scratch, and oil resistant