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many people are saying they want lower mega pixels to combat noise performance, my understanding is that the more mega pixels on a sensor the more noise there is, per pixel and so there will be no positive effect on noise performance by reducing mega pixels on the overall image as a whole, is this correct?

i have in fact read that the more megapixels the finer the grain is, which would create a smoother nicer effect on the whole image

is this information incorrect? any1 have any good websites explaining this?

thanks