P3D Re: P3D Vertical Mounting Standards and Projection

[michaelk@xxxxxxxxxxxxxxxxxx (Michael Kersenbrock)]

>      The size of the projected image on vertical tolerance is of little
> consequence as the bigger the image the further back the audience(except for
> ortho fanatics!).
> 

I don't think that's a problem with "ortho fanatics" in as much the ortho
spot moves back as the projected image gets bigger (recall, for nominal
realist format cameras and images, the ortho spot distance is 
roughly equivalent to 1.5 times the height of the projected image).

Ortho spot is where the eye's angle of view is the same as the camera's angle
of view when the image was taken.  So the ortho distance moves with 
image size.

Hope I got that right.  :-)

Mike K.

P.S. - Of course, one can sit WAYYYYYY back and reduce misalignment problems,
       but see a basketball turned into a football.  :-)


P.P.S. - Doesn't this argue in favor of using long lenses on stereo cameras? That
         way one can sit WAYYYYYY back and both reduce the effect of misalignment 
         errors AND  be sitting in the ortho spot as well (I'm soon to try
         this btw)?  'Course you can't see the screen anymore, but hey, what little
         you see looks perfect.  :-)








------------------------------