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<p>[QUOTE=&quot;kanga, post: 4559160, member: 9270&quot;]I&#039;ve always done manual focus since the distance varies a bit with the slab thickness.</p><p>I use f11.</p><p>That seems to give me a reasonable depth of focus.</p><p><br /></p><p>But I&#039;m shooting from about 4 inches which works for the small coins.</p><p>If they get up to quarter size then I have to back off.</p><p>The geometry of the setup causes problems with larger coins.[/QUOTE]</p><p><br /></p>

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