Well, you always have to have the square root of two involved. For
photographic use it puts them all one stop apart. Can't think of any
other reason why sizing papers with that ratio would make any sense. :-)
Chuck Norcutt
Jez Cunningham wrote:
> In the metric world, the common paper sizes are A6, A5, A4, A3 etc -
> all these sizes have a constant ratio of 1 : 1.414 (pretty close to
> 2:3)
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