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They're at  http://www.edmundscientific.com/

Didn't you just describe the standard prism from an old pair of binoculars?

Roger


----- Original Message -----
From  "Paul Hirose" <71202.2014@COMPUSERVE.COM>
To: 
Sent: Thursday, July 13, 2000 3:09 AM
Subject: [NAV-L] Blish prism


> Here in the U.S., Edmund Scientific has been selling optics (surplus
> and new) to experimenters since the 1940s. I'm pretty sure I've seen
> in their catalog a prism of the type George Huxtable mentioned, i.e.,
> turns the line of sight 180 degrees and offsets it laterally some
> considerable distance.
>
> They surely have a Web site, though I don't know the URL. A search
> should turn it up easily, though.
>

   

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