P3D Re: infinity at zero convergance

[Jim Benbow <blip23@xxxxxxx>]

George Themelis <gthemelis@xxxxxxxxx>, concerning "through the window" in
viewers, wrote:

>Let me guess... You are wearing glasses... Am I right?  It is
>possible that the edges are blocked to some extend when you are
>using the viewer.  This happens when wearing glasses and using
>common 1950s viewers.  But it can also happen if you have
>unusually wide or narrow eye spacing.  
>
>The stereo window is an exclusive "edge effect".  If you cannot
>observe the edges (boundaries) of the image clearly then you
>cannot see the stereo window.

No glasses (yet) but I think I do have a narrow eye spacing. 
I experimented and if I concentrate on the side versus the field I can see the
effect but looking at the slide straight on the effect is lost. I guess I don't
see the sides as much in a viewer as I do in projection.

Jim Benbow