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<p>[QUOTE="SuperDave, post: 2359724, member: 1892"]Using two different color temperatures for lighting freaked out your camera's White Balance setting and caused the color problem. Stick to one type of lighting and the camera should cope better. And make that the *only* light present when you're shooting; keep blinds closed and overhead lighting off. Yes, you can adjust this in postprocessing, but that makes toned coins really problematic. You definitely want the color as accurate as possible, because it speaks directly to the evaluation of surface originality and eye appeal.</p><p><br /></p><p>From a sharpness standpoint, this ain't a bad image at all - especially for an inexpensive point-and-shoot - and I would feel comfortable expressing opinions about grade from it. I've always held that older, lower megapixel P&S cameras are generally better for coins than more modern ones with huge numbers of pixels crammed into a small sensor along with long zooms (zoom lenses are optical compromises) and yours is a good example.</p><p><br /></p><p>I don't think you're *quite* square to the coin; it seems like the upper part is a bit less focused than the lower. Place a small mirror where the coin will sit when you shoot it, and arrange the camera so it "sees" the center of the lens in the center of the frame. This will make the lens plane exactly square to the coin and eliminate the focus difference. You're using the standard technique of firm camera mount and remote/delayed shutter (so your finger triggering it doesn't introduce vibration), right?</p><p><br /></p><p>Your Nikon has a fairly long minimum focusing distance in Macro mode - 5.9" - so ensure you're no less than that distance from the coin, and zoomed all the way out. If you're already that distance or more, don't mess with it. This is a pretty good image. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>As regards the rim, take the corrected pic and post a thread in the Error section entitled something like "What causes this on the rim?" or similar. That will bring attention from people qualified to give expert answers who might not be reading this thread.[/QUOTE]</p><p><br /></p>
[QUOTE="SuperDave, post: 2359724, member: 1892"]Using two different color temperatures for lighting freaked out your camera's White Balance setting and caused the color problem. Stick to one type of lighting and the camera should cope better. And make that the *only* light present when you're shooting; keep blinds closed and overhead lighting off. Yes, you can adjust this in postprocessing, but that makes toned coins really problematic. You definitely want the color as accurate as possible, because it speaks directly to the evaluation of surface originality and eye appeal. From a sharpness standpoint, this ain't a bad image at all - especially for an inexpensive point-and-shoot - and I would feel comfortable expressing opinions about grade from it. I've always held that older, lower megapixel P&S cameras are generally better for coins than more modern ones with huge numbers of pixels crammed into a small sensor along with long zooms (zoom lenses are optical compromises) and yours is a good example. I don't think you're *quite* square to the coin; it seems like the upper part is a bit less focused than the lower. Place a small mirror where the coin will sit when you shoot it, and arrange the camera so it "sees" the center of the lens in the center of the frame. This will make the lens plane exactly square to the coin and eliminate the focus difference. You're using the standard technique of firm camera mount and remote/delayed shutter (so your finger triggering it doesn't introduce vibration), right? Your Nikon has a fairly long minimum focusing distance in Macro mode - 5.9" - so ensure you're no less than that distance from the coin, and zoomed all the way out. If you're already that distance or more, don't mess with it. This is a pretty good image. :) As regards the rim, take the corrected pic and post a thread in the Error section entitled something like "What causes this on the rim?" or similar. That will bring attention from people qualified to give expert answers who might not be reading this thread.[/QUOTE]
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