Neutral Density Graduated Filters Quite often the correct exposure for a background in a scene is not the best one for the foreground or viceversa. The most common problem is that the bright sky is reproduced perfectly while the landscape is underexposed; in fact pitch black most of the times. 1, 2 & 3 f-stops graduated neutral density filters These are the occasions where the color and neutral density (ND) graduated (grad) filters can make the difference between a bad image, a good image and a better ... Last modified on Friday, 10 May 2013