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<p>[QUOTE=&quot;Burton Strauss III, post: 2726755, member: 59677&quot;]The hardest thing with any of the USB microscopes is focusing because the focus knob is built into the body, you will find you are slightly changing the orientation and position of the scope. So it becomes a bit of an iterative process. Just take your time and make small adjustments (I find that if I think about moving the knob but don&#039;t actually do so, the micro movements of my finger actually do make the adjustments).</p><p><br /></p><p>DinoLite makes a good product - I&#039;ve spent time with them at several coin shows when it was slow. I personally bought the 8MP Celestron ($80 on sale at Amazon one day), but find the built-in lights to be too much. I take it to coin shows and use my laptop or tablet to check for RPDs real time.[/QUOTE]</p><p><br /></p>

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