in <3a665426@news.povray.org> Robert J Becraft wrote:

>In my render, I have
>two parralel walls that when placed the correct distance appart do not
>match the same two objects in a photograph of a real space, both in
>angle as well as breath in the image.

One difference with POV an photography is that in POV the angle is the 
horizontal angle, where in photography the angle of a lens is the angle 
measured over the diagonal of the image.


Ingo

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