[sell-3d] Rangefinder, 50 yds - 2 miles

["Paul Milligan" <paulmill@xxxxxxxxx>]

I took this out on a country road and checked it with the trip meter 
on my car.  I found it to be accurate to as close as I could measure 
with the car trip meter.  Now, I am getting too old for such things. 
 
If you are going to to do stereo with two cameras, on a bar, or on
two tripods, you need to know the distance to the closest object in 
the picture, if you are going to do it right.  To determine this with 
any degree of accuracy one has to use a rangefinder.  This is a range 
finder like hunters with high powered rifles use in big game hunts,
to adjust the rear sight on the rifle, to compensate for the drop in 
the bullet's trajectory at great distances.  It happens to be just
the ticket for stereographers to determine the distance to the
closest 
object, in calculating the best stereo base, with some stereo base 
calculator, such as is sold by Peter Herbig in Germany. Jon Golden 
sells one.  New Vision Technology sells a computer program, 3D CALC 
on two floppy disks.  I used Charley Piper's formula set in a pocket 
calculator.    You can order one of these rangefinders out of a 
sporting catalogue, but you will pay a lot more than I am asking, for 
one of this quality.  And this one is as good as new.   Photograph of 
may be seen at 
                 http://www.egroups.com/files/sell-3d. 
$125.00 plus shipping. Postal money order or cashier's check. Paul 
Milligan, 508 La Cima Circle, Gallup, NM 87301. (505) 722-5831.     


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