Film has been a universal standard with a hundred years of legacy. However, it’s been a standard with many variations. The wizards of Clairmont Camera have completed a 70 page catalog of all the different ground glasses and formats they’ve dealt with. It’s available online: a valuable resource, with measurements in metric and inches, and superb, true-to-scale line drawings.

Credits at Clairmont go to Arturo Jacoby, who did the terrific drawings with Open Office.  John Carlson was responsible for  the 4 gray drawings with the formats and perforations, using commercial software. Aaron Wise double-checked all the details.