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Nikon camera settings - Long Exposure NR

This is a great setting allowing your camera to take a second exposure with the shutter closed, and then subtract any sensor noise caused by something called 'dark current'. It is very useful for getting perfectly black skies during long night exposures. But unless you are using for this it has disadvantages.

Turning this setting on has detrimental effects. It reduces the camera’s buffer capacity, and therefore it means that your exposure time effectively doubles. This is one setting that cannot be altered in post processing (there is no way for the camera to take a second exposure after the fact).

Summary

Leave this setting “off” (unless you are unless doing light painting or long exposures at night.)

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