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Astrophotographers should never use ICNR. If your workflow needs darks at the same time as the lights, save/download the darks separately from the lights. This way many darks (of the same temperature) can be combined into a master the next day and applied to every light sub. When creating the master dark, software can eliminate cosmic ray hits from the individual darks and the dark current noise is reduced by sqrt of the number of darks subs used in the combine. A master dark with just 3 darks combined is far superior to one ICNR frame.
Fred: the adaptive feature in Maxim is "Dark Frame Scaling" in the Set Calibration dialog, the Auto-optimize setting is the interesting one for DSLR users.
Cheers,
EB
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