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<p>[QUOTE=&quot;RonSanderson, post: 2598699, member: 77413&quot;]The original post asked about taking pictures with an iPhone. I couldn&#039;t find this thread when I started looking into that recently. Instead, I posted in the &quot;Post your coin photography set-up&quot; thread, <a href="https://www.cointalk.com/threads/post-your-coin-photography-set-up.229658/page-6#post-2594586" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/post-your-coin-photography-set-up.229658/page-6#post-2594586">https://www.cointalk.com/threads/post-your-coin-photography-set-up.229658/page-6#post-2594586</a>. My &quot;setup&quot; is discussed over there.</p><p><br /></p><p>[USER=1892]@SuperDave[/USER], [USER=31773]@rmpsrpms[/USER], and [USER=19094]@robec[/USER] have been very helpful. The closest focus of the iPhone lens is about 4&quot;, so a cent occupies only a small part of the field. You can zoom in, but that is a digital zoom using resampling of the image, and not a physical zoom like you get with the bellows.</p><p><br /></p><p>At the moment I am using an app called Camera+ which gives control over white balance, focus area, and the spot to use for determining exposure. Camera+ has a setting called Macro, which is a 2x digital zoom upsampled from the native resolution. It makes the image large enough to place the exposure setting directly over the coin, so it does not get overexposed (which can happen because the background is black, and the auto-exposure will try to raise the entire exposure higher to try to brighten up that black).</p><p><br /></p><p>If I shoot at native resolution the background is always gray instead of black because the exposure tries to brighten it up. However the colors seem more nuanced, so I may need to work at that to get the deep black background.</p><p><br /></p><p>The first image is without zoom, the second is using the Macro setting (2x in-camera digital zoom). I would like to have the black background of the second with the smoother colors of the first. However, you can see the highlights are also blown out on the left image, because the camera is working with a larger area, much of which is black, to determine exposure.</p><p>[ATTACH=full]566891[/ATTACH][/QUOTE]</p><p><br /></p>

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