Haven't tried it myself, but I guess it would work: in your darkroom , you place a transparent ruler somehow in your enlarger and mark the mm-steps on a paper. Then placing the pinhole-plate in the enlarger, you see if its round and get an approximation of the size.
Perhaps you might get an exact measuring doing some maths on the enlargers height etc - but thats' beyond my skills for sure. /peter > ----- Original Message ----- > From: "Jean Hanson" <jhan...@pon.net> > To: <pinhole-discussion@p at ???????> > Sent: Sunday, July 21, 2002 5:53 PM > Subject: [pinhole-discussion] pinhole size > > > > I have the math on how to figure the ideal size of the pinholes but how > > do you actually measure them. Does everyone but me have a microscope, a > > micrometer? what? Jean P
