Re: Effect of pseudo-stereo

[P3D <PTWW@xxxxxxx>]

Gabriel the kiDDDer takes to puzzling with:

>On a slightly different note, here is a simple puzzle. If your in a
>plane (or train, or automobile) of course you wouldn't have much
>choice in composing which shot will be the left or right view. Now
>would this 3D pair be cross or parallel.

I suppose you mean how it appears on the uncut film?  I have never
had to worry about these considerations, because I have slides from
my SLR mounted by the lab and view them as full frame pairs.  When
they are mounted singly, you can swap left and right images at will.
You just have to remember, or be able to determine, which image you
shot first.

> Also could they be changed
>(cross to parallel or vice-versa) by changing seats and taking the
>shots on the opposite aisle. 

No, when you change seats, the exposed images stay on the film right
where you put them in the first place.  (kiDDDing the kiDDDer!)

Seriously: Yes, certainly.

If you are riding a train with both forward and backward facing seats,
(or flying Southwest Airlines) be careful not to get confused if you
are riding in a backward facing seat.  If you are on the right hand
side of the vehicle facing forward you are shooting toward your right,
and if you are facing backward you are shooting toward your left.  But
this does *not* matter.  Your right eye is still trailing your left
eye when you look out the window, so you will still be exposing the
right eye image first.  It is the turning of the head 180 degrees to
look out the opposite side of the vehicle that makes the difference.

Paul Talbot


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