I'm glad i bought 5d mk2 as my workhorse camera,i used to buy cheap external flash from friend's recommendation and it always failed me by not firing up in many shoots. But with amasing ISO of the 5D mk2,it saved my life many times when i realised the flash failed to fire out i just pushed ISO up and did the shoots with confidence that all my beautiful nephew girls 'd be happy with the photos. Look at the photo and see how beautiful they were under the dark shoot with no flash! I still can remember Emily's remark about this photo "Oh! you did a great shot in the dark,uncle!!!" Thank you Canon 5D mk2,now i own 2 of this model :) #MyEOSStory