What is an ND filter and when would you use one?

ND filter
(Image credit: Digital Camera World)

An ND filter is used to control the amount of light that reaches the sensor without having any effect on colours, tone, or contrast within the scene. Effectively you block out light like a tinted window on a car does. The letters ND stand for neutral density and an ND filter can be a fixed strength or its strength can be variable.

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Jon Adams

Jon started out as a film-maker, working as a cameraman and video editor before becoming a writer/director. He made corporate & broadcast programmes in the UK and Middle East, and also composed music, writing for TV, radio and cinema. Jon worked as a photographer and journalist alongside this, and took his video skills into magazine publishing, where he edited the Digital Photo magazine for over 15 years. He is an expert in photo editing, video making and camera techniques.