The NiSi Cinema 4 x 5.65” Variable Neutral Density 0.6-1.8 (2-6 Stops) Filter is a variable natural density filter with the range of 0.6-1.8 or 2-6 stops. It creates a darkening of the entire image, allowing a cinematographer to shoot with a wider aperture or slower shutter speed. The degree of density is easily controlled by rotating the gear or combining a lens motor to control the density. The aluminum and glass filter is 6mm thick and occupies a single filter slot in a compatible 4 x 5.65″ matte box or can be used without a matte box. It offers 2 to 6 stops of neutral-color light reduction and features NiSi’s optical glass. (NOTICE: Filter product images are rendered examples. Actual product appearance and effect will vary.)