Question

A neutral-density filter is helpful in which filming conditions?

Answer 1

 A neutral-density (ND) filter allows a photographer to control the exposure in an image very easily.
this filter is helpful in the following filming conditions:
- when shooting water as it blurs the moment
- adding motion blur to moving object
- when using a wider aperture

Answer 2

Answer and Explanation:

A neutral density (ND) filter is a type of grey filter that easily attaches to a camera lens, to control how much light enters the camera’s sensor. Since a neutral density filter is neutral, it doesn’t have any impact on image color, contrast or sharpness.

1. We can capture blurry, smooth, misty or silky images of water with this filter.
2. We can use a longer exposure time with an ND filter.  
3. This effect is especially suitable in shooting moving water, such as waterfalls or choppy waves.
4. It adds huge drama and visual appeal to an image.