Better shield, better speed, and better performances are the new improved features of the 2nd generation of original 580EX II named, Canon Speedlite 580EX II flash unit. This new generation of flash unit has water and dust proof as body shield which make it into robust item, it can control the flash function than before, able to do contacts directly which better than original one, able to set EOS-1D Mark III menu, 20% shorter in recycling time, and made by metal hot shoe material. All you need to pay all better items on this Canon Speedlite 580EX II flash unit is for $449 sells NOW.