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<p>[QUOTE=&quot;acanthite, post: 610978, member: 6647&quot;]I blocked all direct light by placing a black object between the lamp and the coin.&nbsp; No other light was present besides the lamp, so the only light was coming horizontally from the lamp to the glass plate and reflecting downward.&nbsp; OK and I suppose some light was hitting the ceiling and bouncing back down through the glass.&nbsp; The trick with the glass plate is that anything in the room that reflects light will show up on the plate as an image, so that has to be controlled.[/QUOTE]</p><p><br /></p>

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