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Re: [ATM] Astigmatism need fixing? And how to do so?

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Subject: Re: [ATM] Astigmatism need fixing? And how to do so?
From: "Bob May" <bobmay@nethere.com>
Date: Sat, 12 Feb 2005 21:04:40 -0800
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Goi back and do a number of tests, rotating the mirror by smaller increments
and comparing the results.  This way, you can find where the axis of the
astigmatism's saddle is if it really exists or whether you are just not
accurate enough with your testing.  Charting the errors (as well as the
various measurements) with a spreadsheet will show very nicely whether you
have astigmatism or just errors in measurement.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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References:
- [ATM] Astigmatism need fixing? And how to do so?
  - From: J Killea <jkillea@yahoo.com>

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