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P3D One Film Deviation

  • From: David Tiede <dtiede@xxxxxxxxxxx>
  • Subject: P3D One Film Deviation
  • Date: Mon, 31 Aug 1998 08:17:48 -0400
In the Bercovitz paper "A Comparison of Camera Base Calculation Methods"
he states "The practical maximum allowable value of d when using the
35mm format about 1.2mm.  For medium format a value closer to 2.5mm is
possible".  Since the OFD depends on film size, what feature of the film
size does it depend upon?  The height, width or diagonal?  Since the OFD
is basically measuring a change in the horizontal direction, is it 1.2mm
for a frame 36mm wide and somewhat less for the frame size of a Realist
camera?  What, for example, should the OFD be for a Nimslo half-frame
camera?


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