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Re: Secondary Size

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Posted by Rick on June 20, 2003 10:11:00 UTC

What is the F ratio,and how high is focuser when racked in.

For an example, A 10" F-6 1.75" secondary,with 12" tube and a 3" high focuser, the hole for the focuser should be 50.625" or 50-5/8th" from mirror face to center of hole.

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