Re: Stereoscopic Telescopes

[P3D John Bercovitz <bercov@xxxxxxxxxxx>]

Peter Abrahams writes:

> Below is most of an article to be published in the Amateur Telescope Makers
> Journal.  Any additional input on the subject is solicited.

There was another kind of ranging binoculars using 3D but I can't 
recall anything about it other than the principle.  There was a 
different reticle at the focus of each ocular.  These reticles 
"projected" a sort of meandering picket fence into the field of view: 


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Each picket was labeled with a distance.

A couple of wild guesses: I think maybe the USA had them and perhaps
also Denmark.

In my role as Orthoman, if I were writing your paper I would attempt 
to describe the types of space distortions which binoculars create:
1) Foreshortening of the third dimension due to magnification (even 
monocular instruments such as telescopes do this).  2) Miniaturization 
of all three dimensions due to increased interocular of objectives
(how's that for conflicting terms?).  But in adding these descriptions,
I would no doubt ruin the very nice paper you've written.  8-)

John B


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