The 1Ds3 cannot take that shot.
Better not let Brian Squibb read this...
Hey, Brian can deal with me. I own both cameras so he can't say too much
I shot with the 1Ds3 Saturday following a steam engine excursion and boy that is an incredible camera ISO 400 and below. In fact, I didn't have any incorrect exposures, and to the 1Ds3's credit, sometimes I get incorrect ones with the 5D3 even in auto ISO w/manual. But that shot I posted, no way!