Variable Exposure ReductionThe NiSi True Color ND-Vario 1-5 Stops offers an exposure reduction of 1 to 5 stops. The density of 0.3 to 1.5 results in a darkening of the entire image, allowing for larger apertures or slower shutter speeds than usual. The density level is easily adjusted by rotating the front filter ring with or without the included silver lever, which can be used to determine the additional exposure time in advance. By slowing down the exposure time or increasing the aperture, depth of field can be controlled and motion can be rendered visibly. The transition of density is smooth, allowing the photographer or videographer to precisely adjust the exposure time to the requirements of a particular scene. For easy and repeatable control of the density settings, the front ring is marked with numbers representing the different aperture values. The ring is knurled on the sides to ensure a secure grip and to facilitate attachment and removal. True Color CoatingThe filter is also equipped with a True Color Coating that prevents color shifts, as seen with other variable filters. The True Color ND-Vario 1-5 Stops is made from high-resolution optical glass for the best resolution and quality. The glass is coated with a NiSi Multilayer Nano Coating, providing a waterproof, oil-resistant, and anti-reflective coating to avoid ghosting and reflections.