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From: woods@hao.UUCP (Greg Woods)
Newsgroups: net.rec.photo
Subject: Stereo Cameras
Message-ID: <1607@hao.UUCP>
Date: Mon, 24-Jun-85 19:43:56 EDT
Article-I.D.: hao.1607
Posted: Mon Jun 24 19:43:56 1985
Date-Received: Thu, 27-Jun-85 06:29:50 EDT
Distribution: net
Organization: High Altitude Obs./NCAR, Boulder CO
Lines: 69


  I am sending this for a friend at NCAR who is not on the net. Here is the
text of his reply. If you reply by mail to this article, please make sure
you note in the subject that it is intended for Doug Hoyt, and I will route
it to him over our internal network.

=============================================================================
----------
Sender:   HOYT
Date:     THURSDAY 06/20/85 13:17:59 MDT
From:     Doug
----------
 
    There are several possibilities for stereo cameras.  One must
 consider viewers for these cameras, so I mention that where needed
 too.
     1) Stereo Realist camera.
         These were designed in 1942 by Seton Rothwite and manufactured
        from 1947 through the mid-fifties.  They cost about $100-$150
        each on the used market.  Many clones of these cameras exist by
        other companies made during the fifties, but they are of lower
        quality generally.  This camera is still the most commonly used
        stereo camera.
         Images are about 24mm by 24mm from 35mm film.  Kodak and other
        places develop and mount them.  The lens is f/2.8 but generally
        I keep it at f/22 for depth of field and expose ASA 25 film at
        1/25th of second in sunlight.  Stereo images to about 3 ft. can
        be made, although a special version of this camera for macro
        stereo exists for images at 4.5 inches (costs is $1200 and very
        difficult to find).  It is a rangefinder camera.
    2) Nimslo
         This is a four lens rangefinder designed to give prints. Result
        are only fair in my opinion.  It uses 35mm print film and can
        focus to about 6 ft.  The latest camera magazines sell them
        for about $25-30 dollars each.  There is some question whether
        the Nimslo camera company will remain in business.
    3) Burdlo
         David Burdlick in England modifies the Nimslo camera to give
        a two lens camera with about a 56mm separation  (vs. 70mm for
        Stereo Realist and eyes).  It can be used to take pictures of
        objects as close as 9 inches.  Frame size is 24 by 35 mm so one
        needs a different viewer to use it.  I have the camera on order
        for a cost of about $350 and need to find a viewer so I can't
        comment further.
    4) LEEP camera system.
         This camera uses 120 film to produce wide angle stereos (about
        140 degree field of view).  It comes with its own viewer and
        mounts and now sells for $1245.  Eric Howlett who makes these
        has sold about 50 of them.  I have one on order  (for the last
        4 years actually) which is due late this month.  A disadvantage
        of this camera is that the images are distorted and thus cannot
        be used for prints.  Since this camera has been under
        development for 4 years, delivery has been delayed but should
        be better now.
 
    For someone new to stereo photography, the Stereo Realist is the
   best way to go.  I can locate addresses of places that sell these
   if someone else doesn't give you them.
 
                                       Douglas Hoyt
                                       NCAR, Boulder, CO
                                       (not really on the net)
 
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