Thread: Barlows
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Old 20-05-2017, 04:49 PM
astro744
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Join Date: Apr 2007
Posts: 1,244
Quote:
Originally Posted by Merlin66 View Post
Yes the cloudynights link gets a bit heated.

I know about the Pretoria eyepiece (28mm I think) and it WAS coma correcting but can't remember what optimal focal ratio / focal length Newtonian it was designed for.
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