Been there, done that, spent hours walking round and round a
barrel in the basement shoving one piece of Pyrex glass around on
top of another with increasingly finer grinding compounds in
between. A drinking buddy neighbor of mine talked me into it
years ago. We each did one. I was really dubious about the whole
project to start with, but I was astounded at the results. It
worked! We both ended up with perfect 8 in. mirrors, which, when
silvered, made damn good telescopes.
Walt
_____________________________________________________________
Never underestimate the power of stupid people in large numbers.
---------- Original Message ----------------------------------
From: "Jeff Keller" <jrk_om@xxxxxxxxxxx>
Reply-To: olympus@xxxxxxxxxxxxxxx
Date: Wed, 5 Nov 2003 08:32:28 -0800
>Amateur telescope makers regularly grind their own parabolic
>mirrors to 1/10 wavelength of light ... even high school kids.
>Very low tech and time consuming. Admittedly easier than a double
>sided lens. A company making lenses as their main product should
>be able to surpass a high school kid easily.
>
>-jeff
>
>----- Original Message -----
>From: "Boris Grigorov" <alienspecimen@xxxxxxxxxx>
>
>
>
>The Olympus business types are trying to market it as a
revolutionary
>piece. You are buying a piece of history...
>But they are also marketing it as a technical marvel. Their
claims are
>(last I heard) that if the 300 mm's surface was as big as a
football
>field, the deviation of it would be less than a human hair.
Pretty
>serious claim, but am not sure if really matters that much.
>I would by the E1, but am not sure if I could justify the 300mm.
>Boris
>
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