[MF3D.FORUM:221] Re: 4x5 3D

[Andy Beals <bandy@xxxxxxxxxxxx>]

And it's not unusual to see milsurp [military surplus] viewers for this pop up 
on ebay for varying prices.

It's my understanding that cities use these for aerial photography for 
detecting new additions and the like.  Anything that's different from one 
photo to the other [over time, same time of year - winter???] will stick out 
for a trained viewer due to the ocular conflict.

On Sun, 27 Feb 2000 17:09:39 -0500, mail <TCNET058@xxxxxxxxxxxx> wrote:
>    On the subject of very large 3d, there is still a company that makes
> viewers for this. Cartographers use 3d on a regular basis so there are
> suppliers out there that make viewers. But these are not viewers in the
> conventional sense. They are glasses that are suspended above the print
> via a wire stand built in to the assembly. I know I saw a catalog of
> this stuff just recently at my place of employment.(Youngstown State
> University) The geography dept has a couple of these viewers.
>    The old military format was 9x9 stereo film split into halves for
> the left and right views. Quite stunning in 3d.
> 
> -Fred Sole