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On Wed, 5 Feb 2020 at 23:03, Robert Chozick via Groups.Io <email@example.com
I just started using an 8 inch RC and tried the CCDT67 on it. I spaced it for 67% bringing the f/8 1620mm scope to F/5.3 1075mm. I really like it and it ends up acting as a flattener to some degree. My guiding wasn’t great so all stars are a little messed up but I think I am going to keep the CCDT67 in most of the time. I like shooting at f/5.3 more than f/8. My other scope is an FSQ-106 so I like using around f/5.