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#2
December 28th 03, 03:19 AM
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Eyepiece Focal Length?
"David Neal Minnick" wrote in message om... Can someone draw me a word-picture or direct me to a resource showing just how the focal length of an ep is measured? That is, if one could cut an ep in half lengthwise showing everything intact, from which part to which part is the f/l measured? David Neal Minnick Lake Elsinore, CA "The meek shall inherit the gulag." This website shows calculations for 2-3 element eyepieces: http://www.astronomyboy.com/eyepieces/ep_calc.html Regards, Ed T. 
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