P3D Re: PHOTO-3D digest 2940

[boris@xxxxxxxxxxxx (Boris Starosta)]

>From: fj834@xxxxxxxxxxxxxxxxxxxxx (Dr. George A. Themelis)
...
>Subject: P3D Re: 1:30 rule, breaking it big-time!
...
>Boris, these discussions are banned from p3d! :-)
...
Banned?! Bah!
...
>Out of curiocity, how would you design a *general purpose* camera
>so that it encourages close-ups???

I saw an old German camera at my friend Jordan Patkin's house: the
lensboard had the two lenses independently mounted.  As the board was
racked forwards or backwards for focus, the lenses would run along these
convergent rails and shift sideways, in and out.  This was not so much to
change the interaxial, but to automatically keep the stereo window just in
front of the point of focus.  This solves the problem of setting a decent
stereo window regardless of your subject distance.

However, I can see of no good mechanical way for a camera to keep
disparities within limits (i.e. control depth).  You could force a limited
depth of field, I suppose, by allowing only larger apertures - but this is
not any more desirable than large disparities are undesirable.

>>Instead the shot ended up looking flat and not realistic.
>
>To your eyes perhaphs.... One of the effects of using a smaller stereo
...
>>But if you seek more depth in a view, as I often do...
>
>A BIG "if" my friend...

It is true that enjoyment of depth will be subjective.  Indeed, perhaps I
am stereo-challenged (not that perceptive to stereo cues), and so require
more obvious stereo depth cues for enjoyment.  But I will continue to
maintain that my sensitivity to depth cues is more in line with the rest of
the general public, and that strong depth cues are what gets most people
interested in the stereo genre.
...
>Time to move it to tech-3d? :-)

Althought the max-OFD / 1:30 rule thread has had some technical content,
certainly my contribution will be less technical and more subjective - as
you have already pointed out.  I want to keep my comments and responses on
P3D.  If others mind, I invite them to skip my messages.  It's not like I
post that much stuff here ;-)

While I'm at it, I'm surprised that some persons have asked the
max-OFD/1:30 rule thread to shut down or move elsewhere.  It has been a
while since so many people had so much interesting stuff to say on this
list.  This is the last sort of thread that I would complain about.  In
fact, the volume of posts on this topic is such that obviously a lot of
people are interested in the topic.  If anyone feels swamped by the number
of messages, just read the list in digest form, as I do.


Respectfully, and feistily, submitted,

Here's a nice quotation my wife just found for me:
"Eroticism is using a feather; pornography is using the whole hen."
- Isabel Allende - Aphrodite

Boris Starosta            boris@xxxxxxxxxxxx
                          http://www.starosta.com
usa 804 979 3930          http://www.starosta.com/3dshowcase



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End of PHOTO-3D Digest 2941
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