The NiSi Cinema 4x4" 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 coloration of the image when used in conjunction with other filters. In order to remove any color cast and keep the Blacks as rich and true as possible, one layer of NiSi Optical Nano Coating is applied to each of this filter's surfaces along with the IR coating to provide the highest color accuracy as possible. This coating, coupled with high-quality optical glass and strict manufacturing standards, give you accurate color, extreme sharpness making it perfect for today’s high-res. cameras. Dual-Sided Nano Coating & Infrared Light Control Made out of a single piece of optical glass, each filter features NiSi’s exclusive Dual-sided Nano coating technology with infrared light pollution control. Scratch, Oil & Water Resistant The nano-coating creates a protective layer over the glass, making it scratch-resistant and easy to clean. Ultra-Low Color Shifting Superior color control compared to other leading competitors. Anti-Reflective Coating NiSi’s nano-coating reduces glares and reflections to deliver a 6K digital image with no loss in clarity.