Further development of Canon's flagship Speedlite has led to the production of the 580 EX II. This is the premier Speedlite for all photographers, including professionals.
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 recycling time is both 20% shorter than the 580EX and is completely inaudible.
Features
Approx. 20% faster recycling time compared to 580EX
Superior build quality, including a metal foot for higher rigidity
Max. Guide No. 58 at 105mm setting (GN 190, feet)
Auto conversion of flash coverage with compatible digital SLR cameras
White Balance info communicated instantly to compatible digital SLR cameras
Full swivel, 180° in either direction
AF-assist beam, compatible with all AiAF points on every EOS SLR
Dust- and water- resistance to match the EOS-1D Mark III
Specifications
Compatible Cameras:
• E-TTL Operation: All EOS digital SLRs; PowerShot G2, G3, G5, G6, and Pro1, EOS-1v, EOS-3, Elan 7N, Elan 7, Elan II, Rebel T2, Ti, K2, GII, G • TTL Operation: All other EOS cameras and T90
Guide Number: 190 (at ISO 100, feet) / 58 (meters); flash head at 105mm zoom setting
Number of Flashes: Approx. 100 to 700, with fresh AA-size alkaline batteries
Recycling Time: Approx. 0.1 to 6 seconds, with fresh AA-size alkaline batteries
Flash Range: Approx. 1.6 to 98.4 feet / 0.5 to 30m (At ISO 100, with 50mm f/1.4 lens at f/1.4)
AF Assist Beam: Built-in; covers all focus points in EOS cameras with 1, 3, 5, 7, 9, or 45 AF points
• Effective range at center: Approx. 2 to 32.8 feet (0.6 to 10m) • Effective range periphery: Approx. 2 to 16.4 feet (0.6 to 5m)
Custom Functions: Fourteen Speedlite Custom Functions built-in; set on Speedlite's LCD panel
Power Source: Four AA-size batteries - alkaline, lithium, or rechargeable Ni-MH usable
External Power Source: Compatible with Dust- and Water- Resistant External Power Pack, Canon battery pack CP-E3 and Transistor Pack E
Dimensions (W × H × D): 4.5 × 5.3 × 3 in (114 × 134 × 76 mm)
Weight: 13.2 oz (375 g), excluding batteries
Brand New USA Retail Canon Speedlite 580EX II TTL Flash Comes Complete with a 1 Year USA Limited Warranty
Can be shipped to APO/FPO 
