Chuck, have you made a Nagler?
On Thu, Jan 26, 2012 at 12:25 PM, <jcarman6@q.com> wrote:
It doesn't have to cost an arm and a leg, it just had to work with your optical system.
That's a big reason I make many of my own eyepieces. (Plus, it's fun, and not a lot of amateurs did it prior to about ten years ago).
Back around the turn of the century, in the heyday of the refractor, the eyepiece of choice was a negative lens in most instances. FOV's were incredibly narrow, but then the primary work of astronomers was mostly positional work, and spectroscopy. The beginnings of modern astro-physics.
Here's a web page that gives brief descriptions and histories for many familiar designs, including the monocentric:
http://www.chuckhawks.com/common_eyepiece_designs.htm _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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