Speedlite 580EX II
Canon's 1946B002 Speedlite 580EX II is the premier Speedlite for all photographers, including professionals. It is newly designed to match with the EOS-1D Mark III in terms of improved dust and water-resistance, body strength, and the ability to control flash functions and settings from the camera menu (EOS-1D Mark III only). Other features include improved communication reliability through its direct contacts. And the recycling time is both 20% shorter than the 580EX and is completely inaudible.