Thanks for the comments!
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nice but at least you tried and got the cobwebs out Mike.
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Quite literally, Dave! I cleaned my mirrors (primary and secondary), re-collimated and removed spiderwebs from inside my tube, (and killed 50 baby spiders on the outside of the tube) before taking this image!
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I've been thinking a LOT about 'transparency' lately...when you say "trans 5/10" do you mean it was 50% cloudy?
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no, not 50% cloudy. I count transparency as how clear the sky is, even if it's 'clear' of clouds. You know sometimes the stars are just really bright, and other times really dim? It can be affected by high level clouds, moisture or smoke or anything else in the air.
And like you, if the transparency is good, you can lower the gain and still have a bright image - if it's bad, you need a higher gain to get the same brightness.
Thanks for feedback!