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I have tried a couple of security cameras and they seem to have a low S/N ratio (which is bad although with a number of frames the noise can be averaged out quite well), but i noticed they have a good CCD response though which prevent that jerky movement that webcams seem to have in low light. Using webcams in unguided scopes need an enormous number of frames to get a clear pic by weeding out all the stretched/distorted frames.
Security and unmodded Webcams are really only usable as planetary cams.
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