All NiSi square filters are Nano coated and offer true to life colour through our IR technology.  NiSi Filters are low reflection, are made from high definition Optical glass and offers double-sided waterproofing.  By using neutral density filters the camera is vulnerable to infrared light which will cast the unwanted red colour to images. NiSi Filters have an added infrared protection coating layer to eliminate the infrared light through the lens to bring back the True to Life Colour.