Warren - thanks very much! I'd love to compare notes with you regarding the best gain / offset values for various targets.
I remembered that as I'm now using FITS images, all the relevant image data is now in the file names and FITS headers...
NGC290 - 30 seconds at 100 gain, offset 0
NGC104 (1) - 10 seconds at gain 40, offset 0
NGC104 (2) - 15 seconds at gain 100, offset 8
Cheers,
V
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