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colourful dots on picture during long exposure D800, pl...

cbrandin

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"RE: colourful dots on picture during long exposure D800, please help?"

cbrandin Silver Member Nikonian since 28th Nov 2011
Thu 15-Nov-12 04:04 PM | edited Thu 15-Nov-12 04:05 PM by cbrandin

These are not hot pixels (mostly), rather it is a long exposure noise - which is a type of thermal noise, not stuck pixels. Colored spots are to be expected because in order to get white dots all three colors (RGB) would have to be noisy in equal amounts. Thermal noise affects pixel wells individually - that is, red green and blue pixels are affected separately.

The "long exposure" noise reduction feature can be used to mitigate this to a large extent. However, when you use long exposure NR images take twice as long to capture because there is the actual exposure and then an additional exposure taken with the shutter closed.

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This is a hot, active topic! colourful dots on picture during long exposure D800, pl... [View all] , ckhuu , Wed 14-Nov-12 12:25 PM
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