Filter for Lenses NiSi Swift System ND16 / 4 stops. This specific filter can be combined with the NiSi True Color VND 1-5 stops to achieve ND variations between 5 and 9 stops, or it can be used with the NiSi Swift adapter to achieve a 4-stop reduction in exposure. It features a nano-coating that makes it waterproof and resistant to reflections. The new Multi-Ti coating provides additional scratch resistance and improved anti-reflective properties. Available in sizes 49, 52, 55, 58, 62, 67, 72, 77, 82, and 95 mm.