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    Re: Blish prism
    From: George Huxtable
    Date: 2000 Jul 13, 4:57 PM

    Roger M Derby  wrote-
    >They're at  http://www.edmundscientific.com/
    >Didn't you just describe the standard prism from an old pair of binoculars?
    >----- Original Message -----
    >From- "Paul Hirose" <71202.2014@COMPUSERVE.COM>
    >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.
    George Huxtable replies-
    Thanks to both correspondents. I have now placed an enquiry with Edmund
    Roger asks about a prism from prisnatic binoculars, but I don't think it
    would do the job. Paul was responding to my initial inquiry of
    9 July, which said, inter alia,-
     "What I need is almost identical to a Porro roof-prism, and any prismatic
    binocular contains 4 such prisms. Unfortunately, the standard prism from
    binoculars doesn't give enough offset for the 80mm. that is required, so I
    expect to require something specially made. Any suggestions would be most
    If Roger has come across binocular prisms that can provide the required
    light-path offset of 80mm or so, from a pair of giant's binocs perhaps, I
    would like to hear about them.
    George Huxtable.
    George Huxtable, 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
    Tel. 01865 820222 or (int.) +44 1865 820222.

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