Thread: I fixed it!
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Old 03-07-2019, 04:24 PM
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multiweb (Marc)
ze frogginator

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Join Date: Oct 2007
Location: Sydney
Posts: 21,234
Originally Posted by codemonkey View Post
Not sure yet, just established that turning the fan off improves FWHM significantly and fixes my on-axis elongation. Solution right now is: I turned the fan off.
I reckon it was due to the primary temperature not being uniform. You might have had a hot or cold spot under the fans maybe. I had similar issues by applying gentle heat to a newt primary. Unless it's evenly spreadout you get those temperature differentials that causes stress in the glass and it translates to wonky star shapes.
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