The Speedlite 430EX II Flash is compatible with Canon's latest E-TTL II (Evaluative Through The Lens) auto exposure technology. When combined with a compatible Canon camera and compatible lens, E-TTL II utilizes subject distance and other information that automatically modifies flash power, resulting in accurate flash exposure regardless of subject size, reflectance, or photographic composition. This is great for photographers that shoot high contrast or reflective subjects, like those encountered in wedding photography. Photographers can now capture every detail from the black of tuxedos to the white of wide smiles and wedding dresses.

Flash or Camera's LCD Panel

Flash controls can now be set on the flash's rear LCD panel, or directly on the camera's LCD screen on compatible EOS Digital SLR cameras.

Quick Access to Features: Intuitively placed controls keep features easily accessible, such as adjusting manual flash exposure from full power to 1/64 in 1/3 stop increments, and enabling the second curtain sync function. A separate Custom Function button provides maximum control over various flash functions.

Added Flexibility: Nine custom functions are also now available, as well as a flash head that is more maneuverable and capable of more angles for bouncing flash illumination than its predecessor.

Multiple Flash Exposure Modes: E-TTL II, E-TTl, TTL & Manual

Improved Recycling Time: 20% faster recycling time than the Speedlite 420EX

Optimum Flash Coverage: Automatically adjusts the flash coverage to adjust for differences in chip size on APS-C sized digital cameras

Pro Functions: High-speed FP sync mode, Rear curtain sync, SE Save Energy, and FE Lock (spot/partial flash metering)

Wireless Operation: Wireless TTL "slave" flash with EOS 1V, EOS 3, D30 and Pro Digital cameras

AF Assist: Ultra-bright 2-LED focus assist-beam compatible with all focus points of all EOS AF systems, up to 9-point AF