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Old 03-10-2009, 10:07 AM
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Moon (James)
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Thumbs up Easy way to measure flexure

I want to share this great idea from Sander on the QHY yahoo group.

http://deepskystacker.wikispaces.com...ential+flexure

It's the simplest way I have seen to measure flexure.
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Old 03-10-2009, 10:27 AM
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Moon (James)
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(I hope this is the right forum for this post)

Some of my results using this method:
ED127 over 1 hour has Dx=3.17 and Dy=6.31
Old 8" SCT with no mirror lock over 23 minutes has Dx= 19.12 and Dy=40.12
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Old 03-10-2009, 06:29 PM
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Thanks for that James, it may be very useful when I get back into DSO imaging.

Slight problem here for the past 3 months,= cloud.
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