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Humm! Maybe Cam. But, why only in the red channel ? Thermal noise should appear in all channels. It is an internal noise from sensor.
I am thinking on the possibility to be problem with my Halfa filter. A bad one, for example. Those dots aren't a normal noise, understanding normal noise as the noise I saw in red channel with skyglow filter or without filter.
Note that this white spot noise appears in 1100D and 350D. More strong in unmodificated 1100D (it has IR filter). I have no other Halfa filter for test, and I haven't no mate near to ask for one to test.
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