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Focusing and DOF

  • From: P3D Greg Erker <erker@xxxxxxxxxxxxxx>
  • Subject: Focusing and DOF
  • Date: Thu, 4 Apr 1996 13:38:48 -0600
A new nude free topic :)

  I took some slidebar 3d's using my SLR and reversed 50 mm lens.
Even shooting at f22 only a third or so of the scene was in
reasonable focus.

  I heard of a camera that has fixed focus (I think) and the
left and right lenses focused at different distances.  Supposedly
in the resulting image your brain picks out the sharper image
from the appropriate eye and the "whole is more in focus than
the sum of its parts".

  Has anyone tried this on macro shots?  Any idea if it would
work?  How much difference in focus can you get away with?

  With my lens reversed I focus by moving the camera (and lens)
closer to or further from the object.  Would this change the
size of things between the two eyes enough to cause problems?

Thanks - Greg

------
Greg Erker, Research Engineer at, (but not speaking for)
  TRLabs, Saskatoon, Saskatchewan, Canada
  



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