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black halos
Hi all
I am getting black rings around stars with my new Canon 6D which I have bolted onto a Hyperstar 14" Celestron HD.
The pic attached shows the extent of the problem. The Nikon I have previously used does not show this artefact at all so I am assuming it is due to the new camera all other things being equal.
The exposure is Cent A and stars are a bit long as it's not guided.
Any help would be welcomed.
Thanks
Richard
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