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<p>[QUOTE=&quot;brassnautilus, post: 2308110, member: 74300&quot;]To get deeper depth of field with focus stacking and to make sure entire depth was in focus, one would need to take a lot of photos, and this compounds with the issue that DoF becomes even shallower at higher magnification / shorter object distances... </p><p><br /></p><p>The easiest solution is always a bigger CMOS. Bigger the frame size, bigger DoF with the same magnification. Fullframe better than APS-C. Medium format better than FF, so on and so forth. </p><p><br /></p><p>Coins are flat so DoF isn&#039;t the biggest worry here I think, unless one was to take flan photos and wanted the entire piece to be within focus... </p><p>Diffraction does not kick in til you had stepped down to F14 or w/e. The amount of light had to be very little. This is, however, more of an issue with newer CMOS, higher resolution (30MP FF sensors like 5DIII). You can probably notice diffraction around F9 on those? </p><p><br /></p><p>Pro macro shooters reverse mount a lens on a bellow to get both magnification and DoF. Here&#039;s an example of a LOT of DoF (spider is longer than it&#039;s wide) and the 2nd photo is his rig.</p><p><img src="https://c1.staticflickr.com/7/6177/6253069072_50a7ccb623_b.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><img src="https://4ground.files.wordpress.com/2010/06/dsc02002s.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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