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Re: ATM Ronchi and Foucault tester questions



> >I am using a JMI focusser as a linear guide so the tester will need to
> >fit in a 1-1/4 inch dia adapter.

The idea of using the focuser is very clever!

Things will get a little cramped inside that 1.25" hole.  Why not just screw 
a 1.25" dowel onto a large plate at right angles, and mount the LED and 
observing port on the plate?

Bill T.

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