Quote:
Originally Posted by ChrisV
So is this problem specific to the ZWO camera and not the QHY163 which has AR coating? Just wondering as I'm thinking about a mono cam. Sorry to hijack Kevn.
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The reflections are off the sensor cover slip, not the camera window so the QHY version shows the same effect... or so I have read on CN.
Quote:
Originally Posted by glend
I believe I have a fair number of sub examples in my library but I will need to track them down. Once I discovered the problem I resorted to framing Alnitak out to avoid it. I use Baader narrowband filters, but I believe it also happens with Astrodons.
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Ben said he would get me a copy of his Oiii master which is a textbook example of the artefact, so no problem if you can't find then Glen.