The Hama Vario ND2-400 Neutral-Density Filter has a variable neutral density from ND2 to ND400.
By turning the filter you vary the amount of light transmitted from 1 stop to 8.
65 stops without affecting the original colors.
This gives you very precise control over the exposure.
This neutral density filter is therefore very suitable for taking dynamic photos of, for example, waterfalls, streams, waves, etc.