At 8:14 AM +1200 3/29/02, Brian Swale wrote:
Suppose, for arguments sake, you decide that at least the detail of
equivalent to 15 line-pairs/mm are required on the print. That fewer will not
yield an acceptable impression of sharpness.
On the basis of the illustrative calculations above, the following
would be the
maximum long-side prints you could make.
35 mm, 1575/15 = 105 mm
6x9cm, 4050/15 = 269mm
4x5 inches, 5625/15 = 375mm
6 x 17cm, 7650/15 = 510mm.
Just by the way, 15 lp/mm is about five times the resolution used for
gravure printing of those big coffee-table books (the few that still
are gravure-printed). So in actuality you may be able to go a bit
bigger than the long sides calculated above.
paul
--
Paul Wallich pw@xxxxxxxxx
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