noun
neutral-density filter; ND filter
Photography and optics term. Also called NDフィルター. Reduces light intensity without affecting color.
See also: ＮＤフィルター
明るい場所で撮影するときは減光フィルターを使うと便利だ。
When shooting in bright places, using a neutral-density filter is convenient.
この減光フィルターは光量を3段階下げられる。
This ND filter can reduce the light by three stops.