NiSi ND16 4-Stop Filter for 67mm True Color VND and Swift System

Designed for use with Ni Si Swift System 4 Stops Full Spectrum Neutral Density Filter True Color Transmittance Precise Stops NEW Multi-Ti Coating Nano coating, waterproof and anti-reflective coating Use with swift system adapter ring to get 4 stops exposure reduction or add on to the Ni Si True Color VND 1-5 stops to get 5-9 stops VND