[Alt-photo] HOW DID FILM (AND PRINT) FORMATS ORIGINATE?
jporkkala at gmail.com
Wed Feb 28 21:15:42 UTC 2018
In his recent dissertation "The Techniques and Material Aesthetics of the
Daguerreotype" renowned daguerreotypist Mike Robinson presents a hypothesis
that Daguerre adopted the full-plate size (as it came to be known) due to
technological limits and expense of optical glass manufacturing at the
time. Daguerre's 1839 lens was an achromatic plano-convex doublet that just
covered a plate size of 164 mm x 216 mm. So this became the full plate, and
other sizes were derived from that... half-plates, quarter-plates,
sixth-plates, etc... all historic standards from the 19th century.
https://www.dora.dmu.ac.uk/xmlui/handle/2086/14332 (pages 250-251, 355)
2018-02-26 18:16 GMT+02:00 John Brewer via Alt-photo-process-list <
alt-photo-process-list at lists.altphotolist.org>:
> I believe you are right Bob, it came from the size/shape of engraving
> plates. The original plate sizes were full plate or whole plate (6.5" x
> 8.5") half plate, quarter plate and several other odd ones like 9th plate,
> 16th plate &c. Not sure where 5x4, 8x10 and 10x12, for example, came from.
> I must say I don't like these shapes, a stubby rectangle that wants to be a
> square. 5x7 and square, however, are my favourite formats.
> On 26 February 2018 at 16:01, bobkiss caribsurf.com via
> Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
> > DEAR LIST,
> > A friend who is teaching asked me how our standard film (and print)
> > formats originated, especially 4x5 8x10, 11x14, 16x20 inches. As these
> > in the "English" system (inches) there may be or have originally been
> > different formats "on the continent" (Europe). She points out that
> > have historically used "the golden mean" (a 1.68 aspect ratio) but
> > photographers never seem to have recognized its significance, at least
> > in their standard camera/film/print formats.
> > My guess was that it had to do with standard copper plate sizes for dags
> > (full plate, half plate, quarter plate) or glass plate sizes. Of course,
> > banquet cameras toss all this to the wind! LOL!!!
> > I bet Richard and a few others will have some great info on this topic.
> > CHEERS!
> > BOB
> > _______________________________________________
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> John Brewer
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