Shutterbug Strasse

A photographer's haven for the lastest in digital or traditional film cameras.

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Deconstructing the Megapixel Myth.....

Posted by Joe M on February 20, 2007 at 17:05:38:
from the NY Times>>>
Let me tease you first with this question: How much bigger can I print a 10-megapixel photo than a 5-megapixel photo?
Most people answer, "twice as big" or even "four times as big."
But they're wrong. In fact, doubling the megapixels of a photo actually lets you add only 20 percent more area to each edge.
Here's the math. A 5-megapixel photo might measure 1944 x 2592 pixels. When printed at, say, 180 dots per inch, that's about 11 by 14 inches.
A 10-megapixel photo (2736 x 3648 pixels), meanwhile, yields a 180-dpi print that's about 15 by 20 inches-under three inches more on each margin!<<<