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<p>[QUOTE="RonSanderson, post: 2949112, member: 77413"]I faced a new problem with animation and came up with a new solution. Some coins are so bright that a single light source causes a lot of glare and reflected hot spots. I tried various ways to flood the surface of the coin with light to reduce the overall contrast between the highlights and darker areas. This sort-of worked, but the rotating LED shown in post <a href="https://www.cointalk.com/threads/post-your-coin-photography-set-up.229658/page-9#post-2938493" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/post-your-coin-photography-set-up.229658/page-9#post-2938493">#173</a> is a different color temperature from my usual Jansjo lights. The Jansjo are a soft white, and the rotating LED attachment is quite blue. This wreaks havoc with white balance. With light sources of mixed color temperatures, rotating the bluer light gives a blue cast to all the highlighting, too.</p><p><br /></p><p>I needed to be able to illuminate and rotate with the same lights. My wife had a turntable that she used in her art studio, and let me use it. It is just big enough to put the entire microscope stand and camera on it, as shown here.</p><p><br /></p><p>[ATTACH=full]719990[/ATTACH]</p><p><br /></p><p>Now the lights are stationary, but the entire coin and camera assemblage rotates under the lighting as a single unit. The coin never moves with respect to the camera, but both move with respect to the lights.</p><p><br /></p><p>Enough talk, here's a picture. Feel free to expand it.</p><p><br /></p><p>[ATTACH=full]719991[/ATTACH]</p><p><br /></p><p>In spite of appearances, the coin never moves relative to the camera, and there is no difference in position from one frame of the animation to the next. The angle to the lights does change from shot to shot, so the shadows move. The light may strike different parts of the contour of the design, so the highlighted reflective points do move across the coin. It is enough to convince my brain that the coin is moving, even though I already know it isn't.[/QUOTE]</p><p><br /></p>
[QUOTE="RonSanderson, post: 2949112, member: 77413"]I faced a new problem with animation and came up with a new solution. Some coins are so bright that a single light source causes a lot of glare and reflected hot spots. I tried various ways to flood the surface of the coin with light to reduce the overall contrast between the highlights and darker areas. This sort-of worked, but the rotating LED shown in post [URL='https://www.cointalk.com/threads/post-your-coin-photography-set-up.229658/page-9#post-2938493']#173[/URL] is a different color temperature from my usual Jansjo lights. The Jansjo are a soft white, and the rotating LED attachment is quite blue. This wreaks havoc with white balance. With light sources of mixed color temperatures, rotating the bluer light gives a blue cast to all the highlighting, too. I needed to be able to illuminate and rotate with the same lights. My wife had a turntable that she used in her art studio, and let me use it. It is just big enough to put the entire microscope stand and camera on it, as shown here. [ATTACH=full]719990[/ATTACH] Now the lights are stationary, but the entire coin and camera assemblage rotates under the lighting as a single unit. The coin never moves with respect to the camera, but both move with respect to the lights. Enough talk, here's a picture. Feel free to expand it. [ATTACH=full]719991[/ATTACH] In spite of appearances, the coin never moves relative to the camera, and there is no difference in position from one frame of the animation to the next. The angle to the lights does change from shot to shot, so the shadows move. The light may strike different parts of the contour of the design, so the highlighted reflective points do move across the coin. It is enough to convince my brain that the coin is moving, even though I already know it isn't.[/QUOTE]
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