NISI Pro Nano 1.5-5 Stop Nano Nan Vario Filters are Variable Density Neutral Gray Filters (ND) providing a reduction in the shutter speed of 1.5 to 5 stops.
The degree of density is easily controllable thanks to a screw on the front ring. Thanks to this ergonomic screw the density transition occurs smoothly what allows the photographer or videographer to adjust the exhibition time required for a scene given.

For those who use this filter with movie or video cameras, it keeps a large opening and allows precise adjustments of the depth of field while maintaining the desired image frequency. The characteristics and qualities of this Filter avoids any "X" that variable ND filters are suffering.

The unique optical glass that made the famous NISI brand was also used for this ND variable, because the quality makes no compromises. In addition, there is Nano Coating treatment that makes the surface waterproof and resistant to grease and dirt. The cleaning of the filters has never been so simple.