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Aug 8, 2010 at 15:33 history edited chills42 CC BY-SA 2.5
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Aug 8, 2010 at 15:33 comment added icelava @matt ND filters are useful when there is too much light and one wants to capture a scene at a shutter/aperture that otherwise becomes too washed out without the filter.
Aug 8, 2010 at 15:31 comment added chills42 @ exactly, but the difference is the in the changed aperture/shutter.
Aug 8, 2010 at 13:50 comment added ex-ms Think of it from the meter's point of view. The meter's attempting to get the same total amount of light to the sensor. Add an ND filter to reduce the light, and the meter just changes the aperture/shutter to get to the same total. Result: nearly identical pictures. And if you add a filter but keep the unfiltered settings, you might as well just underexpose by the same amount without the filter.
Aug 8, 2010 at 13:00 comment added chills42 Sorry, I may have misworded that a bit, I meant darken in terms of decreasing the ambient lighting, which will allow you to change your exposure settings.
Aug 8, 2010 at 11:38 comment added ex-ms NDs won't darken a whole scene unless you use the unfiltered exposure values, in which case it's the same effect as underexposure.
Aug 8, 2010 at 2:56 history answered chills42 CC BY-SA 2.5