The Speedlite 580EX II improves on many of the specifications of its predecessor. Recycling is silent and up to 20% faster. Weather seals ensure that when attached to the EOS-1D Mark III, the [Canon Speedlite 580EX II] achieves the same level of dust and moisture resistance as the camera itself. A redesigned metal flash foot plate and connector pins allow more stable communication between the camera and flash, while a quick release mechanism minimises wear and tear on both units. The flash head zoom covers the range 24mm to 105mm and an integrated diffusion panel allows extended wide-angle coverage to 14mm.

The new Off Camera Shoe Cord OC-E3, Compact Battery Pack CP-E4 and Speedlite Bracket SB-E2 also allow sealing against dust and moisture, giving photographers a complete system to achieve off-camera lighting effects in difficult weather conditions.

Website :  Canon New Speedlite 580EX II Available Spring 2007