Infrared image detail of Portrait of a Lady with a Music Book showing the line underdrawings of the books on the table at the far right. In GaAs camera using 1500-1680nm filter (image: Shawn Digney-Peer)
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Infrared image detail of Portrait of a Lady with a Music Book showing the line underdrawings of the books on the table at the far right. In GaAs camera using 1500-1680nm filter (image: Shawn Digney-Peer)