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Re: Inverting telescope for sextant
From: Alexandre Eremenko
Date: 2013 Dec 20, 19:39 -0500
From: Alexandre Eremenko
Date: 2013 Dec 20, 19:39 -0500
Bill, Thanks for correcting me, I did not know this. > every Galilean eye lens that I have seen in sextant > telescopes has been a single biconcave lens. It is the "inverting scopes" > that have colour-corrected eye pieces, usually two or more positive > lenses. Do you know why this is so? I mean a theoretical explanation. In general it is difficult for me to find any good literature on Galilean telescopes. It seems that they are only used as sextant scopes and theater glasses, nowhere else:-) Alex.
