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Subject: Re: [MAPUG]: Field of View measurements (or the scientifc method at work)
From: Bill Arnett
Reply To: mapug@shore.net
Date: Tue Sep 17 00:08:58 1996

At 10:12 PM 9/16/96, T4Jacobs@aol.com wrote:
>...
>According to my analysis the actual formula should be:
>
> actualFOV = 2 * atan( tan(apparentFOV/2)/magnification)
>...

Yes, that was the formula my spreadsheet was actually using (I transcribed
it incorrectly from Excel notation). My conclusion still stands though;
the actual measurements match much more closely to the simple formula

actualFOV = apparentFOV / magnification

---
Bill Arnett                 "Science is a way of trying
San Jose, CA  USA            not to fool yourself."      -- Feynman
billa@zNet.com                              <URL:http://www.seds.org/billa/>