Tom DelRosario wrote:
>
> Sorry for the off-topic question. But, even though I am reading a lot of
>photography books, I have never seen an answer to this question: if the frame size is
>24mm x 36 mm, then why is it called 35 mm film? (I could also ask, why is it called
>6x6, when it is actually 5.6 x 5.6?)
The width of the film is 35mm. Not just the picture area, but the whole
width to the edges outside the perforations. I think this is how they
describe the size of movie film, which is what 35mm was originally
designed for.
That is probably also true for 120 film--it is probably 6cm to the
edges. Not sure on this one though
Mike
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