Flash Photography
• E-TTL II Wireless Autoflash with Multiple Speedlites
Like with wired, multiple Speedlites, E-TTL II wireless 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.)
TTL and A-TTL Autoflash Speedlites
With TTL and A-TTL autoflash Speedlites (EZ-, E-, EG-, ML-, TL- series) set in the TTL or A-TTL autoflash mode, the flash will be fired only at full output. If you set the camera’s shooting mode to manual or aperture-priority AE, you can adjust the aperture and fire the flash at full output. Meanwhile, the Speedlite will remain in the TTL or A- TTL autoflash mode.
When the 580EX or 550EX is set to C.Fn-03-1, the flash will always be fired at full output even in the TTL autoflash mode.