Noise is supposed to be generated, among other circumstances like high ISO speeds, when the camera has gone past its black level. If so, I am confused as to why taking a photograph of complete darkness shows no signs of noise. Is it because the photosites remain virgin? The photo is as black as it gets, and still, is just that a block of pure black, as opposed to a less dark, but still pretty dark, photograph. The blacks on this one are not completely black, nevertheless show a considerable amount of noise, especially the sparkly one. HELP!!