P3D Re: Keystoning - mea culpa

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

>OTOH at 1 in 30 the cameras are toed in fractionally less than one degree
>each.  (I *can* do this geometry thing really  ;-)  Boris uses more toe in
>than that, and when challenged we all found it difficult to see any
>keystoning reliably.  It could still be OK.  Certainly worth trying it,
>and see what the results are like.

Certainly!!!

BTW, Ferwerda in the excellent reference "The World of 3-D" has an 
entire chapter (ch. 9) devoted to this subject: "Convergence, 
Advantages and Disadvantages".  This is very well written and worth 
studying.  The last sentence reads: "You can also deduce from
this formula that the 'convergence angle' should be smaller
than 3 degrees."  So, if Dave Spacey has done the geometry
right :-) then 1:30 should not be a problem.

George


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