It could be questioned why we use rectangle and square frames at all. The picture produced by a lens is circular with fall off towards the edges. It is only our obsession with Euclidian geometry that makes us frame images the way we do.
there seems to have been several things going on
some of the sizes were based on whole plate sizes and some of them were based on manufactured plate sizes ..
the sheet film sizes it seems were linked to dry plate / glass plate sizes
so when manufacturers were making glass plates camera makers began to standardize
on sizes ...
and sheet film, is smaller than paper and plates because there were a zillion plate holders out there still in use
and people who started using sheet film just bought a little metal sheath that slid into the plate holder and converted it
to film ... when plates went by the wayside, there was no point in making new holders &c since everyone ( manufacturers, users &c ) had grown
accustomed to the sheets beeing 1/16th" smaller than plates ...
bigger than 8x10 seems to have standardized in both english and metric, but because there was never a mass-market business for ULF sizes
they were just varied and sort of based on 8x10 and 11x14 ( guessing )
... 7x11, 11x14 ( half ) and 5x7 is around-1/4 a 11x14
... 8x20 ( pano double 8x10 )16x20 ( quad 8x10 )
... 12x20, 20x24 and their metric cousins ...
... too many others to list and guess about seeing
whenever kodak made a "new" box camera that took roll film, they created a new roll film format
so the film was proprietary and users had to buy the film from them ...
probably the current roll film formats are just based on the old sheet film sizes that are similar,
or PAPER sizes used for enlarging on ...
and 6x6 cm, was probably just .. random like everything else seems to be
" 3x7/8 x 5 7/16 looks like a good format, lets make it and see if it sells ... "
Last edited by jnanian; 07-11-2013 at 07:57 PM. Click to view previous post history.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2
If it weren't for American innovation, the world would still be walking and using outhouses. We use the measurement of the King's foot here, and the rest of the world can adopt OUR system or continued being fouled-up. Forty four year later and I believe all the flags on the moon are American. A lot of crashed un-manned hardware up there from other places.
Last edited by Tom1956; 07-11-2013 at 06:18 PM. Click to view previous post history.