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I have actually just discovered a light leak in the SCT that might impact shooting sky flats. The original fork mount holes look like they are blanked off at the base of the threads but it is just tape, and not very opaque tape that that.
I am just shooting some test darks with the garage light on as I knew it had a light leak but thought it was just a not very form fitting objective cap. Darks shot in light conditions on the SCT resulted in obvious light contamination.
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