P3D Re: Hypo - Ortho - Hyper OR convergence angle?

[bercov@xxxxxxxxxxx (John Bercovitz)]

Larry B writes:
> So both are within your acceptance range. Yet there is some angle
> where the same subjects wouldn't be acceptable to you. That's why you chose
> the ones that you did. Your SEM pairs are Hypo by definition. What happens
> if you used 6 degrees of rotation, identical to how it's applied in the SEM
> situation, with a standard camera and human subject?

I don't know if I'd call it hypo when it's a tilt job.  Sure it's a reduced
base of a sort but the focal length is pretty long.  We have a guy who does
tilts on his rock specimens.  Some of them are human-head size.  Of course
we don't know what the rock looked like in the first place.  A tilt causes
bulging.  See Ferwerda or Woods' page http://info.curtin.edu.au/~iwoodsa/
leading to http://info.curtin.edu.au/~iwoodsa/spie93pa.html

John B


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