The Canon 580 EX II Speedlite improves upon the design of the renowned Speedlite 580EX.
New features include dustproof, water-resistant performance on a par with Canon EOS-1D/1Ds series SLR cameras, the ability to change flash unit settings on the connected EOS camera, and a metal contact area for more reliable conduction.
While the illumination and bounce angles are similar to the previous Speedlite 580EX, performance has been improved to better meet professional needs through a shorter and silent recycling, and an external flash metering function.