I don't use dual ISO all that much, but I didn't have a tripod with me for these first three:



60D, 8mm fisheye, dual ISO 100/1600
10 stop ND filter + dual ISO makes an 8 sec exposure directly into the sun possible:

1100D, Canon 10-22mm @ 10mm, f/14, ISO 100/1600, 8s
(the ND makes some strong color casts that are hard/impossible to rectify, I don't have the $$$ for a really nice one)
add an off camera flash on it's most powerful setting (which still wasn't enough):

1100D, Canon 10-22mm @ 10mm, f/4.5, ISO 100/1600, 2.5s