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I found with my SCT that a lum filter was a big help in restraining reflections that were otherwise very intrusive, I keep seeing RASA images with halos that look like reflections of either the corrector plate or the mirror and wonder if a tightish lum filter would help with them.
The reflections were what tipped me in to buying a really nice APO 80mm rather than a RASA 8". I keep finding them as intrusive as I find the lens diffraction issue in the ASI1600 and similar cameras (Which has stopped me buying one of those too)
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