Quote:
Originally Posted by [1ponders]
Glorious shot Pete. Stunning. In the words of the immortal Marcia Hinns "That's Deep"
Can you explain what is up in the top left corner. It looks like a completely out of focus star or a shadow of the secondary and vanes???
Btw Can I borrow your clear skies 
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I think I've solved Pete's donut problem.
I'm alowed to poke fun at him as he is my imaging buddy!

Aint that right Pete.
The donut is caused by light reflected off the CCD (from the bright star) then bouncing into the rear of the filter, then back onto CCD. The long 30 min sub exposure don't help either.
Cheers,
Brad