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Old 29-09-2008, 05:05 PM
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JethroB76 (Jeff)
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Join Date: Oct 2005
Location: Tassie
Posts: 1,104
If you Google "eyepiece FOV calculator" or similar you will get plenty of options in which you can plug in your scope and ep details and get TFOV, exit pupil etc..

like this one
http://www.davidpaulgreen.com/tec.html
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