Quote Originally Posted by sanking
I have a copy of the ANSI standards for film holders. It is ANSI PHE.108-1988 and is a revision of ANSI PH#.26-1951. The formats covered are 2X3, 3X4, 4X5, 5X7, 8X10, 11X14 and 14X17.

There never were any ANSI standards for formats such as 6.5X8.5, 5X12, 7X11, 7X17, 8X20, 12X20, 16X20 and 20X24. The closest you can come to standards for these formats is that of the manufacturer, say Eastman, Korona or F&S. However, there are no absolutes, and if you were to acquire randomly ten 7X17" Korona holders chances are good that no two of them would have the exact same dimensions.

I completely agree about variation among film holders, been there done that. Fasteners are about the most standardized things we have, but if you measure enough of them critically, you will find that they are all over the place. I MAY make film holders to fit cameras I produce, but I am never going to produce film holders for other cameras. The slight variations would make me pull out what little hair I have left.

Thanks for the ANSI Standard Numbers Sandy.

Barry Young