P3D Re: The "PerPax principle" Challenge!

[michaelk@xxxxxxxxxxx (Michael Kersenbrock)]

> McKay was a practical man: "It you don't see it, it's not there."
> Yet, others insist that in the PerPax principle the problems
> are there and you can see them.

I posted an extended quote from McKay's book back in January of this
year (see p3d's #2539 for the full quote in the archives), and 
at least in his book "Three Dimensional Photography", he didn't
say you couldn't see it -- he only said that if you like it, then
it's okay.  Which is to agree with your assessment of he being
a practical man.

Here's a small portion of my previous quote of McKay:


        "It will be seen that the choice of the base in hyperstereo, or the
choice of the lens-base combination in parastereoscopy, is determined, not
by the traditions of old time stereo, not by some complex mathematical
computation, but solely by the exigencies of existing circumstances.

  Increase the stereo base (hyperstereo) to bring the object nearer.
  Increase the focal length of the lenses to make the object larger.
  The two functions are not at all identical.

        Let it be emphasized that there is no valid reason why the
stereographer should not vary both base and focal length of his lenses if by
so doing be is enabled to obtain a result which is visually superior to that
which would have resulted otherwise."


Mike K.


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