The NiSi Cinema 44 Nano IR Neutral Density 1.5 Filter 5 Stop creates a darkening of the entire image by 5 stops allowing you to compensate for bright conditions whilst keeping your Aperture Shutter speed and iso where you need them to be. The IR Coating eliminates any unwanted colouration of the image when used in conjunction with other filters. In order to remove any colour cast and keep the Blacks as rich and true as possible one layer of NiSi Optical Nano Coating is applied to each of this filters surfaces along with the IR coating to provide the highest colour accuracy as possible. This coating coupled with highquality optical glass and strict manufacturing standards give youaccurate colour extreme sharpnessmaking it perfect for todays highres. cameras.DualSided Nano Coating Infrared Light ControlMade out of a single piece of optical glass each filter features NiSis exclusive Dualsided Nano coating technology with infrared light pollution control.