Quote:
Originally Posted by kens
Whats the light source for your flats? Coud it be an artefact of that?
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A light box. Same one I've been using with my QHY8 the last few years so I don't think it's that. Nor the scope as that hasn't changed. All that's new is the camera, filter wheel and reducer.
Also tried a shot without any filter (my 8th filter slot is empty) and got a similar flat. So it's not something to do with the luminance filter.