NiSi 95mm True Color ND-VARIO Pro Nano Filter Bundle with Hard-Shell Filter CaseNiSi 95mm True Color ND VARIO Pro Nano 1 5stops Variable ND The NiSi True Color ND VARIO Pro Nano 1 5stops Variable ND is designed to mount onto lenses with 95mm front filter threads and provides an exposure reduction of 1 to 5 stops. The 0. 3 to 1. 5 density creates a darkening of the entire image, allowing wider apertures or slower shutter speeds than usually possible. Degree of Density The degree of density is easily controlled by rotating the