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Superior build quality, including a metal foot for added strength Approx. 20% faster recycling time, compared to previous 430EX One-touch, quick-lock mechanism for easy attaching/detaching flash from camera Full flash control possible on camera menu, with compatible EOS Digital SLR cameras Virtually silent flash recycle Full swivel, 180° in either direction Zoom flash head covers range of 24-105mm; maximum guide number 141 ft./43m at ISO 100

Type Mode: E-TTL II, E-TTL, TTL Compatible Cameras All Canon EOS cameras; PowerShot G series cameras Guide Number 141 ft./43m (at ISO 100); flash head at 105mm zoom setting Flash Coverage Fixed condenser lens with inner zoom: (1) Auto Zoom, (2) Manual Zoom, (3) Wide Panel Zoom positions: 24mm, 28mm, 35mm, 50mm, 70mm, 80mm, 105mm; Indicated by numerals on the LCD's focal length display Image Size Zoom Control: With cameras compatible with auto zoom, it zooms automatically to match the camera's image size Number of Flashes Approx. 200 to 1,400, with AA-size Alkaline Batteries manufactured within the last three months or AA-size Ni-MH fully-charged batteries Recycling Time Approx. 0.1 to 3.7 seconds (AA-size Alkaline Batteries)/0.1 to 2 seconds (AA-size Ni-MH batteries) Flash Range At ISO 100, with EF 50mm f/1.4 For normal flash: Approx. 2.3-79.7 ft./0.7-24.3m For high sync speed (EF flash): Approx. 2.3-39.4 ft./0.7-12m AF Assist Beam Built-in; covers all focus points in EOS cameras up to 9 AF points Effective range: At center: Approx. 2.3-32.8 ft./0.7-10m Periphery: Approx. 2.3-16.4 ft./0.7-5m (in total darkness) Custom Functions Six user-selectable Custom Functions built-in; set on Speedlite's LCD panel General Power Source Four AA-size Alkaline Batteries (6V); Four AA-size Ni-MH (4.8V) 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 2.8 x 4.8 x 4.0 in./72 x 122 x 101mm Weight 11.6 oz./330g (without batteries)