4Pcs ND Filter Set ND2 ND4 ND8 ND16 Neutral Density Filtors for Digital Camera
1 ND16 Lens Filter. The number indicates the fraction by which light is reduced; for example, ND2 cuts the light entering the lens by 1/2, ND4 by 1/4, and ND8 by 1. 1 ND8 Lens Filter. 1 ND4 Lens Filter.