[photo-3d] Re: LEEP camera / architectural 3d

["Oleg Vorobyoff" <olegv@xxxxxxxxxxxxx>]

Paul Talbot  wrote:

>The "general wisdom" as I understand it is that shift/tilt
>adjustments should NOT be used for 3D photos.  The distortion
>of the lines from tilting the stereo camera looks perfectly
>normal when viewed in 3D.  If you straighten the lines in the
>scene it sends confusing signals to our brains when viewing
>the photo in 3D!
>
>Hope this helps...and that someone who knows more will help
>educate both of us.  :-)


I actually know less, but would like to point out one thing.  Every ordinary
photographic lens straightens (rectilinearizes) lines, more so the shorter
the focal length.  This amounts to a progressive tilt/shift above, below and
to the sides of the center of the picture.  I have found full frame slides
taken with my widest rectilinear lens (14mm) comfortable to view.  So I
suspect that our brains can easily accommodate a moderate amount of tilting
and shifting.  I hope so, anyhow, since I'd like to use tilting to extend
depth of field in medium format stereo pairs.

Oleg Vorobyoff