P3D Huh?

["Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Tom said:

>it's like scrupulously mounting slides with a precise 
>stereo window, which were shot using the 1/30 guestimate.  

I am a little bit slow tonight... 
What does "precise stereo window" mean?
And how are these two related?

These are really unrelated concepts... The 1/30 guestimate
takes place during recording the pair while the stereo
window is controled during mounting.  There is no such thing 
as "precise stereo window" as different stereo workers follow
different practices.  However, there are certain situations
considered "stereo window violations" and slides recorded with 
excessive on-film deviation can make life difficult during 
mounting with projection in mind.  For many situations the 
1/30 guestimate is a conservative rule of thumb that gives 
some freedom for those who mount "to the window" (closest to 
camera object positioned at, or close to the stereo window).

George Themelis


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