Neutral Density (ND) filters are used to manage the amount of light hitting the sensor. All NiSi Cinema filters are constructed from NiSi-exclusive precision application optical glass for maximum transmittance, sharpness and faithful colour reproduction. Our 4×5.65? 6K cinema filters are available from 1 to 7 stops. The IRND Cine Nano series utilises NiSi Nano® Coating technology. This coating, coupled with high quality optical glass and stringent manufacturing standards, creates a filter with accurate colour reproduction, extreme sharpness and low reflection. These characteristics make the IRND the perfect filter for today's high-resolution cameras.