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Re: [ATM] Re:(ATM) F/10 or F/8?

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Subject: Re: [ATM] Re:(ATM) F/10 or F/8?
From: "Bob May" <bobmay@nethere.com>
Date: Tue, 14 Jun 2005 10:24:54 -0700
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References: <OFD41DB3A0.FFE8326A-ON86257020.0049F124-86257020.004B766E@gracemfg.com><6.2.0.14.2.20050614094432.03169890@popd.ix.netcom.com><001001c570f1$cd6c4020$fc1414ac@mdebug.int>
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The spherical condition is one result of a proper polishing of the surface.
Turning that into an ellipse is just on the way towards a proper parabola.
I'll note also that anything between a sphere and a mild hyperbola works
well at such a focal length as does moderate zoning of the surface.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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References:
- [ATM] Re:(ATM) F/10 or F/8?
  - From: jsgrmfg@gracemfg.com
- Re: [ATM] Re:(ATM) F/10 or F/8?
  - From: Michael Peck <mpeck1@ix.netcom.com>
- Re: [ATM] Re:(ATM) F/10 or F/8?
  - From: "Jonathan Lavoie" <atm@lavoielactee.net>

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