The specifications listed below are for the stock flash - not the infrared flash. Please understand that the flash performance with your camera will vary with a variety of factors. Please read more at IR Camera Flashes
The popular Speedlite 580EX Flash has been replaced by the new Speedlite 580EX II Flash, which features a host of improvements, including a metal hot shoe withan improved locking mechanism for added durability, an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.
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
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.
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
Approx. 0.1 to 6 seconds, with fresh AA-size alkaline batteries
(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
Fourteen Speedlite Custom Functions built-in; set on Speedlite's LCD panel
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
3.0 x 5.3 x 4.5 inches /76 x 134 x 114mm
13.2 oz./375g, without batteries (4 AA alkaline batteries add 3.5 oz./100g)