Re: 3D pic in Pop Science (was Vertical error & leveled camera MISCONCEPTION!

[P3D Carrano, Allan <allan.carrano@xxxxxxxxxxxxx>]

>Bob Howard and Dr.T discussed vertical error and the effect of not holding
>the camera level. It is true that even holding the camera perpendicular
>to the ground so that the camera lens are up and down instead of left and
>right will result in no alignment error. I would just like to go in a
>different direction in regard to this thread and discuss taking 3d pics in
>this way on purpose. If you try to take wide format 3d pics with a narrow
>format 3d camera by holding it sideways you'll still end up with narrow
>pics since to view them properly, you'll have to mount them with the
>horizon running vertically. My question is I don't think it is possible to
>reconstruct the 3d information so that we can visualize the vertical depth
>but with the horizon in the proper left right orientation. Even if one
>tried to view the images with the up-down MagicViewer this would not work.
>This is designed to fuse horz parallax...........

You're right all the way, Gabe.  I thought I'd instructed my newbie
about 'horizontal only' with her Realist, but she has a very well
qualified 2D photographically oriented significant other, who "helped"
her learn exposures and composition --- to him that meant going for some
"wide angle" shots by turning the camera on end.  

During our mounting session, we all learned the foibles of such folies.
Some shots were very nice and ended up as single frame Pego mounted
savers.  None looked well in stereo mounts.  BTW, here's an instance
where it would work:  A close-up in a bush of a lizard or some other
small animal, whose orrientation relative to horizon/ ground or anything
else would not be relevant.  

I mentioned some time back on the list, I have often shot stereo slides
with a significant tilt in the camera.  These would be a problem in
projection, but not in a viewer.  The mind trick one must play, though,
in using the viewer is to be able to accept that the window you are
looking through is tilted from the real world you are standing in. If
you tilt your head in viewing the scene in the same attitude that you
tilted the camera in taking the picture, it works.

Allan C. 


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