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OK,
Couldn't sleep, so fiddled a bit.
I chose the dark frames (ie. the ones taken when the sensor was a bit cooler) and tried again.
I think I was using median combine last night. I tried median combine again and kappa "something or other" (it's late and I was out at work for 14hrs today).
The attached file is with selected darks and median combine.
Is there anywhere that explains these combination methods and suggests what to do with DSS.
I have a trial of Maxim DL, but haven't really tried to use that. I can't capture >30sec exposures directly into Maxim without spending lots of dollars on a special cable for Nikon. Does Maxim load Nikon RAW files?
Thanks again for looking.
It's starting to dawn on me that there is an awful lot to learn about post-processing..................
DT
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