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[ATM] Ross null test?

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Subject: [ATM] Ross null test?
From: "Rob" <polaris@gsinet.net>
Date: Wed, 25 Aug 2004 06:21:21 -0400
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hi,
 I am thinking of using a null test for my next project, a 10" f/6 ...  maybe conical.
Is the Ross Null generally the best, easiest for an ATMr like me?  Where can I get a reasonably priced reference lens?
Ceravolo offers one but it's > $500.

  Also, on conical mirrors ...  it seems the main issue is how to support the mirror while working TOT.  How do people do it
with slumped blanks?  It seems the problem is similar.

Thanks,
Rob
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