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[ATM] Collimation
Give this a try for collimation. Remove a central portion of the reflective coating on the primary, say 1/4 inch and illuminate this area FROM behind with red LED. Using auto collimation eyepiece you then perform collimation watching the multiple reflections via the autocollimation eyepiece. Very accurate, and quick and easily performed without totally wrecking night vision, as checked against conventional use of autocollimation and star test (and easier to perform).
John
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