Re: Wider than normal lenses

[T3D Greg Erker <erker@xxxxxxxxxxxxxx>]

>Now, since I'll be getting 79% more stretch
>than I should be, could I temper that a bit by using baselines
>on the short side of what the calculations call for?

  Let's use a simpler example. A 28 mm camera lens and a
56 mm viewing lens for the resulting slides. This gives
us 100% stretch.

  If you shoot with normal baseline then X and Y dimensions
appear correct but Z appears doubled. If you now reduce
your baseline to half of normal then X and Y appear
doubled in size and Z is four times.

  So as far as I understand it, changing baselines
scales all three dimensions, viewing with the wrong
lens only affects the depth (Z) direction. So monkeying
with the baseline can't fix the stretch or squish.
>
>   Also, how do I get a copy of John B's maofd spreadsheet?  I know
>I've seen reference to it before, but maybe now is the time to have
>a copy of my own.

It's on bobcat at:
http://bobcat.etsu.edu/ftpdir/photo/photo-3d/technical/maofd/

>   Thanks again for your response.

  You're welcome.

Greg E.



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