An ND filter is and abbreviation for a Neutral density filter. An ND filter is used by photographers to change the aperture, exposure time and motion blur of a subject or landscape.

Use a Graduated Neutral Density Filter.

1) Ground

2) Girl Next Door

3) Graduated neutral density filter

A type of filter where the effect goes from least to most across the surface of the filter. The assumption is that one portion of the scene deserves more of the modifying effect than the other. Most of the time, this applies to a neutral density filter.

The cast of A Neutral Density - 2005 includes: Lynn Crecelius as Timothy