ND filters are also helpful when the contrast between the highlights and shadows is too high to get a quality exposure. The ND64 6 stops ND filter is generally used during the golden hour to create exposures of 1-2 minutes for smooth water or clouds. A 6 Stop is also great for capturing dynamic water while retaining some texture before the golden hour. NiSi ND filters do not affect the colouration of the image, offer a true to life colour and are made from high-quality optical glass (not resin) with nano coating to prevent losing any single bit of detail. By using a neutral density filter the camera is vulnerable to infrared light which will cast the unwanted red colour to the photos when shooting at a small aperture. NiSi ND filters have an infrared protection coating layer to eliminate the infrared light through the lens to bring back the natural true to life colour.