Thread: Ritchey Chretiens and collimation
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Old 15-09-2009, 05:21 PM
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pmrid (Peter)
Ageing badly.

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Join Date: May 2008
Location: Cloudy, light-polluted Bribie Is.
Posts: 3,760
Paul, I am indebted to you and other contributors who have proffered some practical advice - all of which I receive in the spirit in which it is given. Thank you.
Peter
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