26 Jan
2012
26 Jan
'12
1:31 p.m.
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