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Running out of things we can do via message exchange, unfortunately. It's a matter of step by step checking each "element" in the system - left barrel, right barrel, focus of each, then both together, focus of both together then followed by collimation. The Zoom control throws an extra curved ball into the system. Where are you Chris - close to Perth or not?
I should have said that "glasses" was really about checking focus. If the naked eye needed a lot of adjustment, beyond the range, it is likely the glasses-corrected eye required less.
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