[photo-3d] macro slide bar?

[John Toeppen <toeppen@xxxxxxxx>]

David wrote:
"macro images I have taken with a stereobase of 11mm have 
objects less than a foot away that are hard to fuse, yet the 
mushroom image does not with objects that are hundreds of feet 
away."http://www.stereoscopicsociety.org.uk/Pages/Slides_A.htm

The answer is all too simple: a slide bar was used.  The camera was
not "toed in" (towed in, toad inn?)-- coverged.  The image shows
little curvature of field - suggesting a long lens.

Avoid the converged condition as keystone distortion and curved
fields produce different R&L image sizes off of center.  George's
miracle slide bars, long lenses,small apertures, good tripods, and long
exposures, and fine grain film would seem the right stuff.  Oh, and then
there were probably the dozens of other rolls that were shot,
interpreted,
 and improved upon each season.  This seems a refined technique 
and a lucky shot.

John Toeppen