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Underexposure is the greatest generator of noise


_DSC4097, originally uploaded by shutterhack.

Taken with a Nikon D50 and AF Zoom-Nikkor 70-300mm f/4-5.6G lens

To deliberatly underexposed the photograph at the time of taking it and hoping to correct or alter the 'ev' value in RAW-post processing software is not a great plan. While you can compensate for under exposure with RAW, if you are talking about a couple of stops, you create a noise machine from your camera. Don't have the science but underexposure is the greatest generator of noise. 1/2 a stop you can get buy, 1 stop you will start seeing noise, > 1 stop forget about it.

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