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I emailed astrotech 3 days ago with regards to their announced 0.75x reducer/flattener, and also asked about the internal reflection... I am yet to get a reply.. Waiting, waiting waiting...
I highly doubt its an aberration, more likely light shining off something inside the OTA.. My current thoughts are secondary baffle, the end of the primary baffle tube and possibly the mirror edge... An aperture mask made for the two mirrors will either identify that as the problem, or rule them out.. then I'd be looking at the other options... At the end of the day I would imagine that this wont be something thats extremely hard to fix.
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