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<p>[QUOTE=&quot;KBBPLL, post: 25676403, member: 104064&quot;]I sort of get what you&#039;re trying to do, but you can&#039;t measure a physical object in pixels. A GC 4000x2000 GreatPhoto of the obverse of a Barber dime trimmed to the edges is 1890 pixels wide. So that <i>is </i>the diameter of the dime in pixels, for the particular resolution that they use. In my example, the GC 1890 pixel image is 584mm wide on my screen at 100%. The physical dime is 17.9mm. So you can say that the image I see is ~33 times bigger than the physical dime (584 / 17.9). But you can&#039;t say the dime is really 58 <i>pixels </i>in diameter. I think all you&#039;re trying to do is determine the level of magnification a particular photo, right?[/QUOTE]</p><p><br /></p>

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