Canon Speedlite 430ex II Flash: * 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 for the Canon Speedlite Flash: Six user-selectable Custom Functions built-in; set on Speedlite"s LCD panel * Power Source: Four AA-size Alkaline Batteries (6V); Four AA-size Ni-MH (4.8V) * Dimensions: 2.8 x 4.8 x 4.0 in./72 x 122 x 101mm * Weight: 11.6 oz./330g (without batteries)