I do ICNR as well but really would like to be able to take darks separately. Many people do it so I'm sure its possible. I guess I need to take the darks in-between the lights, instead of at the end (for example).
Maybe 1 dark every 2 lights. The problem with that is, it doesn't allow you to do a completely automated run, because you need to be there to put the lens cap on, setup the new exposures, etc.
At the moment with ICNR, I can set up a 2 hour run and go to bed, set the alarm for 2 hours later and point at a new target.
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