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Old 06-05-2019, 07:40 AM
Billyboy78 (Bill)
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Billyboy78 is offline
Join Date: May 2018
Location: CRESTMEAD Brisbane
Posts: 103
I wish..The 20" primary is F/3.39 and the 8" secondary is F/2.46.

Still battling the astigmatism I polished in. KE says it is around 1mm deep, so nearly there ( ie, 1mm variance in fl). The edge correction has got to be zero so I want to get it as good as possible. Centre correction btw is 18.76mm
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