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I though 0 was unity gain on these?
Not really unity either, unless they have changed the firmware all gains on this camera are above unity as far as I know. The lowest gain was about 0.8e/ADC and 100 equals about 0.25e/ADC. I was looking at starting with the lowest gain to preserve the full well capacity, the read noise at that gain is around double what my ASI294 is at unity gain, which is still around half that of most CCD cameras.
More interesting experimentation to come for me. I have the advantage of skies that fall somewhere between Bortle 3 and 4.
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