GND是啥东西? ( i8 _1 u5 t* m; L. U牛肉粉丝 发表于 2010-10-11 22:19
# ?& G4 ^3 k' l' i7 A* A/ h , P3 s5 A6 T6 N- Y9 d0 TA graduated neutral density filter, also known as a graduated ND filter, split neutral density filter, or just a graduated filter, is an optical filter that has a variable light transmission. 简单的说渐变滤镜