With the new purchase of my Canon 5DMark II I also bought a Canon 580EXII speed light. This combination is simply amazing ! I shot this in not so great lighting conditions but because of the solid power of the 580EXII I was able to over power the sun and still maintain details in the highlights because I used Hi Speed Sync mode.
If I didn’t tell you I used a speed light flash you would probably think I used some really elaborate lighting set up.
If your curious about the details & how I pulled this off, ask me

Photographed with a Canon 580EXII