Nice Rob, nice. As you indicate, this is a fascinating area of the night sky. The dust cloud extends a considerable distance. Processing looks pretty good. Surprised you didn't take any darks. Perhaps this is contributing to the dark spots around the image, though I would expect that to be more likely flats. I wouldn't bother combining subs of different exposures unless your using a HDR process. You're better off taking 5 x 10 min subs instead of 10 x 5min subs. Longer subs will give you a more pleasing result, unless of course you need to handle the object's vast dynamic range or your using a NABG chip prone to blooming. Combine the data with same exposure time subs. Then layer the two in PS. There are plenty of other ways to handle the dynamic range situation. Overall, well done. Look forward to seeing more as you start tuning the camera.
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