NiSi67mm True Color ND-Vario 1-5 Stops (0.3-1.5), Variable ND ND2-ND32, Nano-Coating with Optical Glass

NiSi - 67mm Swift True Color ND-Vario, 1-5 Stops (ND2-ND32) Variable ND Filter, Waterproof Nano Coating Optical Glass, with Lens Filter Case and Lens Cap - Compatible with NiSi Swift System Filters

NiSi 67mm Swift FS ND16-4-Stop Neutral Density Thread-Less Filter - for NiSi Swift System, Friction Mounted Press-On Filters - Full Spectrum True Color, Optical Glass, Waterproof Nano Coating