Some film terms have multiple meanings depending on the context, for example "ND".
ND" (1)- "Nondescript". People and things that are part of the scene but won't draw undo attention are sometimes called ND by Assistant Directors. "Get three ND Background (background extras) for the newspaper stand!"
"ND" (2)- Neutral density filter. An ND filter is a gray glass camera filter that blocks a certain amount of light evenly across the light spectrum. It is placed in front of the lens to reduce exposure while not affecting the color of the image. Crew may also tape plastic sheets (gels) of ND to windows to reduce light coming in through the windows. There are several grades of filters in several ranges.
See photo below:
ND" (1)- "Nondescript". People and things that are part of the scene but won't draw undo attention are sometimes called ND by Assistant Directors. "Get three ND Background (background extras) for the newspaper stand!"
"ND" (2)- Neutral density filter. An ND filter is a gray glass camera filter that blocks a certain amount of light evenly across the light spectrum. It is placed in front of the lens to reduce exposure while not affecting the color of the image. Crew may also tape plastic sheets (gels) of ND to windows to reduce light coming in through the windows. There are several grades of filters in several ranges.
See photo below:
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