The Haida PROII Variable ND 2-5 Stop is a solid variable neutral density filter that provides an exposure reduction of 2 to 5 stops. The 0.6 to 1.5 density creates a darkening of the entire image, allowing you to video or photograph with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled by rotating the front filter ring, helping you to predetermine the additional exposure length required. By slowing your exposure time or increasing your aperture, you can control depth of field and convey movement more easily. For easier, repeatable control over density settings, the front ring is also visually demarcated with dots that represent different density values. Key features of the Haida PROII Variable ND 2-5 Stop Reduces Exposure by 2 to 5 Stops Darkens Entire Image Greater Control over Exposure Settings Optical Glass Construction Coating: Optical reduce reflective coating, Optical hydrophobic hard coating