The Hoya ND 500 reduces light by an equivalent of 9 stops. Neutral density filters (ND filters) are among the most sought-after and important types of photographic filters for several reasons. For photographers, ND filters provide precise control over the amount of light entering the lens, allowing for greater creative control over exposure. For video content creators, ND filters are very helpful in adjusting shutter speeds to match frame rates while maintaining the depth of field of the footage. Thanks to the leading ACCU-ND technology, the image is not negatively affected by color shifts that can occur due to inferior materials, poor quality control during manufacturing, or issues with infrared leakage in the light spectrum. With HOYA's exclusive ACCU-ND technology, a uniform reduction of light in the visible and IR spectrum is achieved. As a result, photographers need not worry about color shifts when using HOYA ND filters under various shooting conditions.