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Does anyone use an HP scanner for coin pics?
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<p>[QUOTE="Conder101, post: 1892130, member: 66"]Probably has to do with the lamp used in the scanner. Probably has a cooler (more blue light) bulb. Scanners, not being point sources are good for hiding contact marks, but they wash out luster and leave coins looking flat and dead. Tipping the coin slightly can help some but scanners have another problem. They are designed for imaging two dimensional objects not three dimensional ones. They are set to focus on or ever so slightly past the surface of the glass plate. The more expensive the scanner the sharper that focus tends to be, and the sharper the focus the smaller the depth of field that is in focus. So the further you get from the surface of the glass the more out of focus the image. For this reason cheaper scanners often do better than expensive ones. On cheaper ones the depth of field is greater and the coin remains in focus.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 1892130, member: 66"]Probably has to do with the lamp used in the scanner. Probably has a cooler (more blue light) bulb. Scanners, not being point sources are good for hiding contact marks, but they wash out luster and leave coins looking flat and dead. Tipping the coin slightly can help some but scanners have another problem. They are designed for imaging two dimensional objects not three dimensional ones. They are set to focus on or ever so slightly past the surface of the glass plate. The more expensive the scanner the sharper that focus tends to be, and the sharper the focus the smaller the depth of field that is in focus. So the further you get from the surface of the glass the more out of focus the image. For this reason cheaper scanners often do better than expensive ones. On cheaper ones the depth of field is greater and the coin remains in focus.[/QUOTE]
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