Re: 1 to 30 rule

[P3D John W Roberts <roberts@xxxxxxxxxxxxxxxxx>]

>Date: Wed, 9 Jul 1997 10:48:58 -0500
>From: P3D William Carter  <wc@xxxxxxxxxxxx>
>Subject: Re: 1 to 30 rule

>Gecko queries:

>>Does anyone know how to determine the distance of far objects. 

>A range finder, for any distance further than you can throw a rock, requires
>that you can measure the height of some known object. 

You must have a strong arm! :-)  Binocular rangefinders for hunters are
available that are pretty accurate out to several hundred yards, and I'm
sure the traditional military binocular rangefinders were good out to the
thousand-yard range, perhaps much further. Nowadays most of the interest
seems to be in laser rangefinders.

Can SL3D be used for extreme hyperstereo? (Perhaps using a large-aperture
low f/ratio telescope?)

John R


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