Using EOS-Dedicated, External Speedlites 
With EX-series Speedlites
An EOS-dedicated, EX-series Speedlite (optional) makes flash photography as easy as normal shooting. You can easily do the flash operations below. For detailed procedures, see the Speedlite’s instruction manual.
E-TTL II Autoflash
E-TTL II is a new autoflash exposure system incorporating improved flash exposure control and lens focusing distance information, making it more precise than the previous E-TTL (evaluative flash metering with preflash) system. The camera can execute E-TTL II autoflash with any EX-series Speedlite.
• High-Speed Sync (FP flash)
With high-speed sync, you can set a sync speed faster than 1/250 sec.
• FE (Flash Exposure) Lock
Press the camera’s <A> button to lock the flash exposure at the desired part of the subject.
• Flash Exposure Compensation
In the same way as normal exposure compensation, you can set exposure compensation for flash. With a Speedlite, the flash exposure compensation can be set up to ±3 stops in 1/3-stop increments.
• FEB (Flash Exposure Bracketing)
The flash output is changed automatically for three successive shots (only with FEB-compatible Speedlites). Set flash exposure bracketing up to ±3 stops in 1/ 3-stop increments.
During FEB shooting, the <d> icon will blink in the viewfinder.
• E-TTL II Wireless Autoflash with Multiple Speedlites
As with wired, multiple Speedlites, wireless E-TTL II autoflash with multiple Speedlites provides all the above features. Since connection cords are unnecessary, flexible and sophisticated lighting setups are possible (only with wireless-compatible Speedlites).
About EZ/E/EG/ML/TL-series Speedlites
The flash cannot be fired with an EZ/E/EG/ML/TL-series Speedlite set in the TTL or A-TTL autoflash mode. Use the Speedlite’s manual flash mode instead if provided.
