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P3D 1/30 rule doesn't work for macros!

  • From: Tom Deering <tmd@xxxxxxxxxxx>
  • Subject: P3D 1/30 rule doesn't work for macros!
  • Date: Wed, 12 Aug 1998 08:45:52 -0400 (EDT)


>We have a microcope at work the Olympus stereo zoom model SZ-III which goes
>from 7x to 40x with  x10 eyepieces and X 1 objective. The working distance
>is then 88mm but the lens seperation is 18mm so would seem to be excessive
>according to the 1/30 rule .


The 1/30 rule-of-thumb does not work for macros.  It assumes that some
objects in the photo will be at infinity.




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