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<p>[QUOTE=&quot;benveniste, post: 3086300, member: 25547&quot;]The challenge is that if the D3100 detects chipping, it requires that the aperture ring to be set to the minimum aperture or it shows the dreaded FEE error code and won&#039;t operate.&nbsp; When you&#039;re setting the aperture via the camera the non-linearity becomes an issue in all modes.&nbsp; A &quot;chipped&quot; adapter could work as long as it pretends to be a fixed aperture lens.&nbsp; You&#039;d then have to go through the usual dance of opening the aperture to focus and then manually stopping down to meter and shoot.</p><p><br /></p><p>To my way of thinking, for coins the unmetered manual workflow is no more of a hassle.&nbsp; The only extra &quot;bit&quot; one may want is a light meter, and a smart phone app works pretty well for that.&nbsp; And since, as you correctly point out, different coins require different exposure solutions, with a D3100 under constant light it&#039;s actually easier to change shutter speeds than to dial in exposure compensation.[/QUOTE]</p><p><br /></p>

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