Quote:
Originally Posted by AstroJunk
......(one of the biggest benefits of a big truss dob is the ease of alignment - you can watch the donut on the barlowed laser through it's reflection on the diagonal whilst 'doing the business' at the blunt end)
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That's interesting. If I understand correctly what you are doing, it seems to me that a strategically placed "diagonal viewing window" in an OTA might be useful?