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It is a meaningless 'test' as the Sbig has nine times the usable photons. The Canon only uses a third of its pixels for each colour.
Then test them at the same temperature!
Sorry try again by maybe illuminating the Sbig without any filtration for thirty seconds and the Canon for 30 secs through red, green and blue filters and converting the three images to luminance. Then the test would be more equitable. The IR filter still hampers the unmodded Canon.
Bert
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