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Old 07-10-2017, 11:25 AM
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DiscoDuck (Paul)
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Join Date: Apr 2014
Location: Adelaide
Posts: 691
Quote:
Originally Posted by gregbradley View Post
Try making a better bias out of a large number of bias frames and see if that helps. Make sure your bias is at the same temp and gain as the lights. You can get odd effects if darks and biases don't match the lights exactly.

Greg
Thanks Greg. Will give that a go. I also used PI's Superbias. I may then also go back to a straight master bias and see if that helps.

Quote:
Originally Posted by Camelopardalis View Post
Nice Helix Paul

How many subs went into the stack?

I’ve not seen this in my stacks, but I’ll have a good stretch and see...
Thanks Dunk. That's 34 10 minute subs I think from 2 nights. The second night had quite heavy moon and so the stack wasn't much better with the 34 than the first 18 by themselves.

I also came across this, which suggests using an output pedestal in calibration https://pixinsight.com/forum/index.p...10690.msg66814
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