Hi again,
 The "B" camera had a large format, 18" x 18"
and a 36" focal length.  The lens was an exotic
diffraction-limited.  It used a 9 1/2" thin base
film in the form of 2 6500' rolls to make up the
two halves of the 18" frame.  This combination 
could cover a million square miles at a ground
resolution of one foot.  The aperture was fixed
at f/8.
  Regards,
Fox sends.
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