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Hi Peter,
I can't remember what scope you have and obviously that will play a part in the best exposure setting for your case.
For comparison, I'm also shooting the cat's paw tonight. I have a 10" Schmidt Newt and a QSI683 CCD. For Luminance I shoot 5 min unbinned subs and always run my camera at -15 degC.
Here's a single raw (uncalibrated) sub straight from the camera to give you a comparison. I'm close to the city in Brisbane (all sky camera shows the light pollution).
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