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Solved: focus issue with GSO Dob and TV eyepieces
Having found that there was not enough out-focus for my Televue eyepieces, then buying the 35mm extender from Bintel and not having enough in-focus, I swapped the extender for the new Bintel 2" to 1.25" adapter with built-in T-thread. It raises the eyepiece a couple of millimetres higher than normal and now the TV eyepieces focus without pulling them out a bit. Perfect!
Morton
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