Hi Greg,
Not to argue a point too much, but from what (little) I know about CMOS cameras (my Player One Poseidon is quite new) there are more than a few guys over at CloudyNights that say the flat-darks are quite unnecessary with the newer CMOS cameras and that just taking flats in the normal way (just subtracting bias) will work just fine. I've done it both ways with my camera and so far I cannot see any difference.
Peter
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