P3D "very provocative..statement"

[John Toeppen <toeppen@xxxxxxxx>]

George Themelis wrote:

"........I know it sounds very provocative as a statement, but here is
my
reasoning:  Our eyes are spaced on the average 65 mm apart.  
There are many situations where we would like to shift the camera
less than 65 mm.  Close-ups, macro stereo, excessive depth in the
scene, etc.  I cannot think of any practical situation where 120 mm
would do it, while 65 mm would not.  Can you?  If the subject is far
away and a hyperstereo is needed, usually this would be quite a few
times the average interocular and not just two."

Why that provicated me, George........

http://members.home.net/toeppen/monoshp.htm
uses a 175 mm basline well enough.

Why would I select this? Because this is how close I can get the cameras
to each other.  I also get a large image that I can crop.

If I were to use 135 mm fl lenses the 175mm separation would be about
"normal" in parallax angle and field of view.  Since I am using film and
scanning I can crop to achieve the same effect.  If I wanted "normal"

But a little hyper effect can be a good thing.  This seems to work best
with large subjects that can withstand apparent "shrinkage."  And it
still works when the subject is 50ft away.  

Lens spacing on a stereocard camera was what, 95 mm?  You know that it
is stereo, and more real than real!

John Toeppen
http://members.home.net/toeppen


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