Posted by Bob Stoddard on November 14, 2000 at 16:10:56:
I have searched this site using several different
search "targets", but I have not been able to turn up
information on the sizes of the lens openings in the
various shutter sizes such as #1, #3, #5, etc. I am
looking for the diameter and thread pitch of the
threaded part of the lens cell which fits each of the
shutter sizes. I believe that there is more than one
standard that was used, and that there may not be
interchangeability among Kodak, Ilex, and Compur, for
example. Does anyone know where this information is
published? RKS