Canon EOS 20D - Manual (Page 97)

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An EOS-dedicated, EX-series Speedlite 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. Set flash exposure compensation 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.
• 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).
The flash cannot be fired with an EZ-, E-, EG-, ML-, or TL-series
Speedlite set in the TTL or A-TTL autoflash mode. Use the
Speedlite’s manual flash mode instead if provided.
Using EOS-Dedicated, External Speedlites
With EX-series Speedlites
About EZ/E/EG/ML/TL-series Speedlites