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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 (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: (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 General 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)
