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Old 02-12-2016, 12:16 AM
Mark_S (Mark)
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Mark_S is offline
Join Date: May 2016
Location: Sutherland Shire, NSW
Posts: 7
I guess it does help if I add the remainder of the post DOH!

so ...

I also want to use my 2" Televue Powermate 2x for which I also have the T-ring adapter. My question is what amount of back focus do I need from the Powermate T-ring adapter? From reading the Televue website and a very brief chat to Al Nagler himself from TeleVue in New York I understand this to be 2" (56mm) to the imager. Is this correct or do I need to still work the powermate in with the 146mm stated by Celestron?

Thanks in advance and clear skies!
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