Re: understanding (3rd verse)

[P3D <Linnstaedt@xxxxxxx>]

Allan, John or Someone wrote:

<<...I don't know why you can't go from closeup to infinity in one stereo
pair....>>

Experience tells me that a real object in my (real) face is going to be
uncomfortable to view.  Consider the effect of a child who asks you to look
at something while he holds it too close to your face.  Hard to look at, eh?!

Fusing images close to the face causes eyestrain; so a stereogram (or -graph)
is uncomfortable when you must fuse something which is virtually in your
face, or even closer.  (Is it possible for an image to be closer than "in
your face"?  You bet! cross your eyes and look at your nose.  How long can
you tolerate this?)  If infinity is mounted improperly so that it is too
close, there is the potential for putting foreground objects into stereo
Hell.  There is a limit to how far your eyeballs will turn inward, unless one
pops out (which is again, possible; in unfortunate situations).  The
limitation is not stereophotography so much as human endurance.

If I may illustrate, it is for much the same reason that people close their
eyes when they kiss or make love:  the two people are too close to each
other's eyes to be seen comfortably (unless you enjoy fusing your lover's
eyes, or other symetrical body parts.)  We close our eyes for other reasons,
too, but surely you get it now, don't you?

Best,
Robert


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