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I used to get plenty of amp glow from my old 350D.. anything over say, 2 minutes and I'd get a rather large glow in one corner of my images..
I found darks would remove it. however the darks had to be taken at a similar temperature to the lights...
From my knowledge of how ICNR works, it should remove amp glow if its present. Being that it is noise generated by heat of the amp during the exposures, it should show up in an ICNR "dark"
Give ICNR a go, failing that, darks is the way to go...
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