將波長的穿透率,維持在低穿透的條件,如:5%, 10%, 20%等,維持波段固定的穿透率。
Neutral Density Filters 2%.4%.5%.10%.20%.45%.65%.75%
2% Neutral Density Filters
4% Neutral Density Filters
5% Neutral Density Filters
10% Neutral Density Filters
20% Neutral Density Filters
45% Neutral Density Filters
65% Neutral Density Filters
75% Neutral Density Filters