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<p>[QUOTE=&quot;desertgem, post: 2265899, member: 15199&quot;]Do not take the magnifications given seriously as compared to the magnification of the loupe or actual compound microscope ( stereo or singular lens system). 100X in compound scopes is&nbsp; the magnification of one lens ( ocular) X the other ( objective). To get 100X with almost all USB scopes, they measure magnification by the final size of the image. This is from the first amazon scope mentioned</p><p><br /></p><p>&quot;2.0 Megapixels, up to 250x magnification (Note: <b>Final magnification corresponds to monitor size)&quot; </b></p><p><b><br /></b></p><p><b>&nbsp;</b>I use a 40&quot; monitor, so I guess some of these USB photos are thousand of power magnification, and they should be able to show bacteria easily. They don&#039;t.</p><p><br /></p><p>At the lowest &quot;magnification&quot; of the usb scope mentioned above, the image is the smallest and the resolution/sq.cm. of area is the greatest. But when the scope and magnification is cranked up to &quot;300X&quot; the area observed is perhaps 10X larger, but the resolution is fixed by the chip in the camera, so the resolution /area is cut by 1/10.</p><p><br /></p><p>Look for the Highest Resolution , and not the alleged magnification. May I give an example. These 2 shots were taken with a compound scope at 400X. The left photo is the surface of an Uncirculated Morgan dollar, showing the ^^^^^^^^ type of flow lines/ridges for brighter toning refraction. The right , fewer, more muted lines of a a Peace $ that gives a different toning characteristic. Can a USB do this? </p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/comp400x.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><br /></p><p>This is the same setup, except at 100X.</p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/comp100.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><br /></p><p>Please do not think I am just Dissing USB microscope owners, they certainly can have good outcomes with the right light and stability, but think of the majority of&nbsp; varieties that are presented&nbsp; as large &#039;blobs&#039; lately, due to the belief all high power images look like that. Start with boos if you like, but I would like to see the Morgan surfaces taken by the USB. </p><p><br /></p><p>Just a pretty coin of mine <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/1939Sobv.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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