NUANCES Variable ND2-400 filters are made of mineral glass, introducing innovative technology .A new coating process ensures an uniform density and a nano metallic alloy is applied on both side of a highly resistant tempered Schott Glass B270, renowned for its high transmittance and low reflection. Nuances Variable ND2-400 will catch 1 to 8 f.stops of light, dedicating its use to long-exposure photography and/or depth of field reduction in extremely bright conditions for video shooting. Specs: Mount: Aluminium Tread Diameter: 67mm Number of Stops: 1 to 8 Carrying Pouch: included Base (1/1000s) 1/500s – 1/4s Transmission % 50 to 0.40 What's in the box 1 x Cokin Nuances ND 2 > 400 67mm Mineral Glass Filter 1 x Filter Pouch Limited 1-Year Warranty