One-touch quick-lock mechanism makes it easy to attach or detach from the camera and a metal foot has been added for strength and durability
Flash controls can now be set through the camera's LCD screen on compatible EOS Digital SLR cameras
Recycle time is 20% faster (as compared to the 430EX)
Compatible with Canon's wireless E-TTL; it can be used as an affordable "slave unit"
Approx. 20% faster recycling time, compared to previous 430EX
Full flash control possible on camera menu, with compatible EOS Digital SLR cameras
Full swivel, 180° in either direction
Zoom flash head covers range of 24-105mm; maximum guide number 141 ft./43m at ISO 100
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, Effective range 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
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
