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P3D Re: Re P3D Math-LESS solution for Realist close-ups

  • From: fj834@xxxxxxxxxxxxxxxxxxxxx (Dr. George A. Themelis)
  • Subject: P3D Re: Re P3D Math-LESS solution for Realist close-ups
  • Date: Thu, 10 Sep 1998 11:43:56 -0400 (EDT)
>The 1/30 rule doesn't do it.  The math is simple enough.  2.75 inches
>between the lenses, times 30, equals six feet eleven inches.  So according
>to the 1/30 rule, you can't get any closer than seven feet with your
>camera.  Clearly wrong.

Except the 1/30 rule assumes infinity in the picture.  So it is correct.
If infinity is not included in the picture you can get closer by following
the f8 marks in the DOF scale.... or Tom's graph/tables.

George Themelis


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