Wider than normal lenses

[T3D <vidi@xxxxxxxxxxxxx>]

   I would like to get the groups opinion on shooting
with "wider than normal" lenses.  I am about to take
some stereo images of real estate, both interior and 
exterior, and would like to know how much of a wide 
angle lens I can get away with without imparting too
much "squash"(?) (or is it streatch) into the image. 
I will ONLY be viewing the images with a handheld 
viewer that has a 50mm F.L. lens.  I know the taking 
lens and viewing lenses SHOULD be the same and projection 
will do it's own thing with distortion, but in my 
restricted use, do you think a 28mm lens on a 35mm SLR 
(slide bar) camera would produce acceptable images.

   I intend on determining the Basseline by the formula:

Baseline = (1.5 X nearpoint X farpoint)/28(farpoint-nearpoint)

   Are there refinements to this formula that I should use to 
minimize the distortion of using a 28mm lens (the only wide 
angle lens I have) while viewing with a 50mm FL viewer?

   Thanks in advance for and input you can provide me.


John Vala


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