Speedlite 580EX Manual
Page 4
... you are using the 580EX with a Type-A camera . TTL autoflash (off-the-film metering for flash photography is automatically compatible with the camera's flash metering mode {E-TTL II, E-TTL, and TTL} . When the 58DEX is an EOS-dedicated, high-output flash unit automatically compatible with E-TTL II, E-TTL, and TTL autoflash . The Canon Speedlite 58QfX is attached to...
... you are using the 580EX with a Type-A camera . TTL autoflash (off-the-film metering for flash photography is automatically compatible with the camera's flash metering mode {E-TTL II, E-TTL, and TTL} . When the 58DEX is an EOS-dedicated, high-output flash unit automatically compatible with E-TTL II, E-TTL, and TTL autoflash . The Canon Speedlite 58QfX is attached to...