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Re: filmscanners: OT (a bit): Publishing pictures :)

Austin writes:

> That depends on the film format, and what you
> mean by poster-sized, and what your expected
> quality is.

It's pretty easy to calculate.  If the viewing distance is equal to or greater
than 6875 multiplied by the size of a pixel, then the resolution is high enough.
That is _extremely_ conservative, however, and in fact about 2300 x pixel size
would be sufficient.  At 150 lpi, that's a distance of 15 inches, and so 150 lpi
is sufficient for use in things like magazines.  This would require 225 ppi in
the image; at 2700 ppi, that would mean a maximum image size of about 11x17
inches, easily enough for a full page or beyond.

Large enlargements of 35mm film are more likely to be limited by the grain
structure of the film than by the resolution of the scan.


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