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Does it help if my inspection of the corners as far as star distortion correlates perfectly with the curvature output of CCDI.
Why CCDI is all over the place is because our images are!
Whether this is due to flexure or any other contributing aberration is a matter for elimination.
This is effect is far more insidious than what I have presented here. You will be very surprised what the problem/solution really is!
Perfect hindsight is a wonderful thing.
bert
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