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<p>[QUOTE=&quot;Insider, post: 2604734, member: 24314&quot;]OK, teach me what is correct.&nbsp; If a zoom scope is operating properly, I can go from 5X to 80X (using light pipe) and the image of the coin&#039;s surface will be sharp (resolution?) only magnified 80 times.&nbsp; The depth of field may get problematic at 80X (the blur?).&nbsp; The same thing (?) happens on an SEM. Extremely sharp image (resolution &amp; extreme magnification) with no blur. </p><p><br /></p><p>That&#039;s why I posted that once I cannot find any problems on a coin at 10X it rarely changes at higher powers and IMO, anything over 10X (with good light and two eyes) is plenty of power when looking for &quot;perfection.&quot;[/QUOTE]</p><p><br /></p>

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