NiSi Swift System extends the capability of the True Color 1-5 Stop VND by adding extra filters simply by pressing them on the front Reduces Exposure by 1 to 9 Stops True Color 1-5 stops VND Variable Filter + ND16 (4 Stop) = 5-9 Stops Variable Neutral Density Filter Offering Greater Control Over Exposure Settings, Allows Reduce Shutter Speeds and Wider Apertures True Color result that avoids color shift seen in other Variable filters Exposure Range-Control Filter Ring with Hard Stops at Each End No 'X' Effect High Definition optical glass Nano Coating, Waterproof and Anti-Reflective Coating An optional rotating lever that can be removed The Black Mist 1/4 Reduces Highlights, Lower Contrast, Softens Wrinkles and Blemishes The Black Mist Creates a soft, pastel-like quality of light and Creates that cinematic look Use the ND16 (4 Stops) or Black Mist 1/4 without the True Color VND using the included adapter ring