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The popular Speedlite 580EX Flash has been replaced by the new Speedlite 580EX II Flash, which features a host of improvements, including a metal hot shoe withan improved locking mechanism for added durability, an external metering sensor for non-TTL automatic flash exposure control and a PC socket for use with non-dedicated slave triggers. Fully compatible with all EOS SLRs, the Speedlite 580EX II is gasketed for dust and moisture resistance, making it possible for users of EOS-1 class digital SLRs and many L-series EF lenses to use flash safely when shooting in dusty or wet environments. Item Includes Pouch - Table Stand - 1 Year Canon U.S.A. Warranty 4 AA Nickel Metal Hydride (NiMH) 2900 mAH Rechargeable Batteries with 4-Hour AA & AAA Quick Charger, 110/220 volt - Flash Diffuser for 580EX II Key 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 with all EOS digital SLRs; PowerShot G2, G3, G5, G6, and Pro1; and the following EOS film cameras - EOS-1v, EOS-3, Elan 7N series, Elan 7 series, Elan II series, Rebel T2, Ti, K2, GII, G. TTL operation with all other 35mm EOS SLRs, and Canon T90. *Guide Number - 190 feet (at ISO 100) / 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 - (At ISO 100, with 50mm f/1.4 lens at f/1.4) - Approx. 1.6 to 98.4 feet / 0.5 to 30m *AF Assist Beam - Built-in; covers all focus points in EOS cameras with 1, 3, 5, 7, 9, or 45 AF points; Distance range - 2 to 32.8 feet (0.6 to 10m) at center; 2 to 16.4 feet (0.6 to 5m) at periphery *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 - External power supply - compatible with Dust- and water- Resistant External Power Pack, Canon battery pack CP-E3 and Transistor Pack E *Dimensions - 3.0 x 5.3 x 4.5 inches /76 x 134 x 114mm *Weight - 13.2 oz./375g, without batteries (4 AA alkaline batteries add 3.5 oz./100g)