Neutral Density (ND) filters are used to manage the volume of light hitting your sensor.  All NiSi Cinema filters are constructed in NiSi exclusive lens grade optical glass for maximum transmittance, clarity and faithful colour reproduction with no loss of sharpness. Our 4×5.65″ 6K cinema filters are available in 1 to 7 stops. The Nano IRND Cine Filters series uses NiSi advanced Nano Coating technology. This coating, coupled with high-quality optical glass and strict manufacturing standards, give you a filter with accurate colour reproduction, extreme sharpness and low reflection. These features, make the IRND the perfect filter for today high-resolution cameras.