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Old 05-01-2017, 06:34 AM
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Atmos (Colin)
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Atmos is offline
Join Date: Aug 2011
Location: Melbourne
Posts: 6,413
The curvature would probably look pretty crazy even if the collimation was correct without a flattener. A visual star test will give more accurate results as you only work on the very centre of the field where there are not any other aberrations to contend with.
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