114. ND the Essential Tool for the DP
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episode notes
ND filters reduce the amount of light hitting the sensor without having to affect the ISO or shutter speed.
Filter Types
4x4”, 4x5.65”, and 6x6”. They are used in a matte box.
Round fronts with diameters between 27mm and 186mm. They use a tread that attaches directly to the lens.
IR Pollution
Older filters did not have to deal with the sensitivity that comes with digital sensors and thus did not have to deal with IR pollution.
With digital sensors today ND filters have to have some IR protection build into the filters. These are called IRNDs. Make sure, when shooting on digital cameras you are using IRND, or else, you could have muddy brown images.
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