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<p>[QUOTE=&quot;dougsmit, post: 787146, member: 19463&quot;]Novoflex makes one for $809.50 (B&amp;H Photo price) that retains auto diaphragm features of the lens.&nbsp; For that price, you can buy a very good macro lens that will be much easier to use and allow shooting whole coins as well.&nbsp; The minimum bellows thickness will require a long focal length to even shoot as far back as 1:1.</p><p>&nbsp;</p><p>Being a cheapskate, I use a 1970 vintage M42 Pentax screw thread bellows (newer ones are cheaply available on eBay) with manual diaphragm.&nbsp; I have used it with an old enlarging lens but the sample below is an old Pentax Takumar 50mm f/4 macro reversed.&nbsp; Currently there is one on eBay at $16.50 so we are not talking over $100 for bellows, lens and adapters.&nbsp;&nbsp; The sample is a detail of the Capricorn from a standard of a Legionary denarius of Septimius Severus (193 AD):</p><p><img src="http://www.pbase.com/image/121086821.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>&nbsp;</p><p>Note in my hurry to shoot this image I failed to dust off the red lint from the flocked tray in which I keep the coin.&nbsp; At this magnification, you need to work cleanly.&nbsp; This image is not cropped (but reduced to fit here) and is half way extended on my bellows.&nbsp; Only you can decide if the Novoflex is worth the difference to you.[/QUOTE]</p><p><br /></p>

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