Obviously it was a thing for film cameras, but now that everything is digital, something like “just make the picture darker” seems extremely easy to do with software
quick edit, I know what ND filters are for and how to use them, no need to explain. it just seems to me that it could be engineered in a way that doesn’t require them, which is what I’m asking about
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They are mainly for outdoor video shooting. Because the ISO is static and shutter speed is based on frame rate the only way to adjust exposure is apature without an ND. The change of apature also effects dept of field. So the ND filter gives videographers a second way to adjust for exposure.
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