Fig. 3

H. Holbein the Elder “Tree of Jesse” (Inv. No. HM 6), detail of Jesse. MA-XRF Zn-K element map with differing dwell times: a 3.04 ms/pixel. b 10 ms/pixel. c 50 ms/pixel. d 100 ms/pixel. ^©Städel Museum, Frankfurt am Main, Department for Art-Technology and Conservation of Paintings and Modern Sculpture, M. Gerken