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P3D Re: The ortho seat

>In any projection system, if the lens used is close to "normal" 
                                  ^^^^^^^^^

I am talking about the recording lens (lens used to take the
picture) not the projection lens.  The projection lens does
not matter... all it matters is the size of the projected image.

>then the "ortho seat" is at a distance equal to the diagonal
>of the projection screen.

-- George Themelis


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