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- From: mcdonald@aries.scs.uiuc.edu (J. D. McDonald)
- Newsgroups: sci.astro
- Subject: Re: > C8 stories + radial guider bug
- Message-ID: <mcdonald.253@aries.scs.uiuc.edu>
- Date: 27 Aug 92 19:06:38 GMT
- References: <-xcn+bb.benoit@netcom.com>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: UIUC SCS
- Lines: 79
-
- In article <-xcn+bb.benoit@netcom.com> benoit@netcom.com (BENOIT SCHILLINGS) writes:
-
-
- >Could someone raytrace a star image at 0.5 inches from
- >the optical axis for a C8 f/10. This could be
- >the best way to know for sure.
-
- Sure. This is actually for a Meade 8 inch f/10, but Celestrons
- are essentially identical.
-
- begin 0666 beam3.gif
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-
- end
-
-
- The dimensions are in inches. You'll note that coma predominates,
- but lurking under there is indeed lots of astigmatism. My tracer
- program does not give a breakdown into the primary aberrations,
- just the spot diagram. You'll note the abysmal image. Yes, experiment
- agrees.
-
- Doug McDonald
-