Thread: Planning to upgrade the OTA - Suggestions? (refractors only)
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  #12  
Old 09-05-2021, 07:25 PM
AdamJL
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Join Date: Sep 2010
Posts: 2,100
Can I ask how you've got the backfocus setup, Kuz?

I see the field flattener has a 75?mm backfocus which is a bit weird. What tubes have you got setup to achieve this?
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