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<p>[QUOTE=&quot;dougsmit, post: 2635886, member: 19463&quot;]The can diameter is smaller than the ring diameter so the light from the ring illuminates the side walls of the can about half way down but leaves a shadow in the middle.&nbsp; A smaller ring or a higher position of the ring would require using a smaller diameter can.</p><p><br /></p><p>I was once told that there are many people into both physics and ancient coins.&nbsp; I am not a physics nerd but just a general purpose nerd who loves questions like that.&nbsp; Yes, ring lights make it very hard to keep the background black.&nbsp; If I could overcome the other problems I would stuff a black hole down the can but fear a coin might fall off the post and come out in another dimension. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie77" alt=":pompous:" unselectable="on" unselectable="on" />&nbsp; I apologize to anyone who took this last part seriously.&nbsp; If Neil DeGrasse Tyson can have a TV show merging Pop-Culture and Astrophysics is it so bad to want to merge Astrophysics and coin photography?&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie93" alt=":troll:" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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