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Are we talking visual or photography???
For solar imaging 99% of the time On the ED80 use the x2.5 PM or the Baader x2.25 Hyperion Barlow. The Meade/ ES x3 telecentric also works well.
(I just wish they made a x3.5 version of the PM or telecentric)
For visual, although I have many (!!!!) Barlow’s and PM’s I seldom use them.
A good Plossl or ortho will work well for the higher magnifications.
I have an ol’ 4.8mm Nagler which is very good, but not used as much as my 6mm Monocentric.
Just my 2c.
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