This picture set is from 
http://www.mpi-inf.mpg.de/resources/hdr/calibration/index.html


img01: 13
img02: 10
img03: 4
img04: 3.2
img05: 1
img06: 0.8
img07: 0.3
img08: 1/4
img09: 1/60
img10: 1/80
img11: 1/320
img12: 1/400
img13: 1/1000