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Good point re framing as it seemed to me that the dragons could be included just a little more.
What I like to do is select a short exposure time say 1500 mil.ses and turn gain up to max to check framing and focus even... and that usually shows nebulosity that you may wish to include but just remember to change back to appropriate imaging settings as there have been times where I forgot started my session and come back to find I have wasted half an hour or more with test subs, and on that point it is worthwhile looking at the first couple of images I often stack the first six ( 30 sec subs here) in Deep Sky Stacker and brighten and darken the final image to see how things are going...
Edit addition.
Thanks for your kind words Jacob.
Alex
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