I come across a weird situation regarding noise. A lass in my digital photography class mailed me the shot to analyse it. I never seen a case this bad. I had to reduce the size to 120kb to upload so I think the hot pixels will be evident. The attached picture shows some noise that I would expect from a cheap camera, low lit poor focus shot. That noise is evident. What I find strange are the 4 -6 pixels areas that showing up white/blue/red. My guess is the ccd is becoming faulty due to either: Thermal noise on certain pixels due to the heat within CCD. I might get her to shoot a shot covering the lens and examine by dark frame extraction process. Electronic Noise. If the CCD is failing then the stray capacitances might be causing these multi pixel noises. That might explain a signal to noise ratio problem. My thinking here is that some of the individual ccd sensors are being overcharged and causing multi hot pixels in the image. Exact cause: Unknown. Heat? CCD design? poor noise algorythm? I dont think its dust on the CCD or lens as there are red and blue pixels too. Comments please.