Pete, you actually have 2 reflections in this image. All I can sugest is getting a good antireflective UV/IR filter and mounting it at the end of the imaging train and see if a reduction in reflection is possible. I have had quite some improvement using a Baader IR blocking filter mounted on the end of the camera adapter. Not a total resolution, but not a failure either. The QHY8 has reflections from the CCD to the filter or reducer in front on any bright stars and this has reduced significantly.
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