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Allan,
Great post and thread
Very ingenious design on the primary too
I’m a Newt man through and through since the start
Gee I’m glad I image at f5 not f4
One observation I made was that my carbon fibre newt holds collimation better than the metal tube newts ( obviously little or no thermal expansion along the tube from end to end ) Although that’s at f5 , f4 may be a different proposition
Cheers
Martin
PS: I’ve ordered another Klaus Helmerich Carbon fibre tube for my 8” f5 GSO metal tube newt , so will be retrofitting in March
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