ND filter types
| | lens area opening, as fraction of the complete lens | Filter Optical Density | f-Stop Reduction | % transmittance |
| | 1 | 0.0 | 100% | |
| ND2 | 1/2 | 0.3 | 1 | 50% |
| ND4 | 1/4 | 0.6 | 2 | 25% |
| ND8 | 1/8 | 0.9 | 3 | 12.5% |
| ND16 | 1/16 | 1.2 | 4 | 6.25% |
| ND32 | 1/32 | 1.5 | 5 | 3.125% |
| ND64 | 1/64 | 1.8 | 6 | 1.563% |
| ND128 | 1/128 | 2.1 | 7 | 0.781% |
http://www.austadpro.com/blog/neutral-density-filters-and-graduated-nd-filters/
No hay comentarios:
Publicar un comentario