Originally Posted by
Ken Lee
Roughly speaking, a 5x7 image scanned at 2400dpi gives a 12,000 x 16,800 pixel file.
Printing at 300 dpi (an enlargement of 8x) we can produce a roughly 40x56 inch print. At that size, a digital print make with competent sharpening can be quite impressive if we can afford to print and frame it.
More conservatively, if an Epson scanner really only delivers 1500 dpi at 50% contrast we can enlarge by a factor of 5X but still end up with a formidable 25 x 35 inch print at 300 dpi.
At large size, prints cost more than film and equipment because paper and ink (or paper and chemistry) are pricey. I stick with 16x20 prints for that reason, except when someone commissions larger works.
Because enlargement from 5x7 to 16x20 is only 3-4X, 16x20 prints from 5x7 are often so sharp that they hardly requiring any sharpening before printing.
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