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Old 28-09-2013, 12:56 PM
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naskies (Dave)
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Join Date: Jul 2011
Location: Brisbane
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Thanks, gents. Yep, I agree for deep narrowband images it definitely seems worthwhile. For light pollution limited LRGB subs, it's probably not worth the trouble unless you're already doing it for NB.

I forgot to mention above - bottom line, with the 8300 chip (and presumably others too) I'd recommend taking dark frames at the longest duration you image at and scaling down for best results. For example, take a library of 30 min darks and scale them for LRGB subs at 5, 10, 15 mins etc. Doing it the other way (scaling up) result in much more error.
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