User Guide

113
Flash Photography
6
Flash Photography with Speedlite 550EX
Set the correct flash exposure level.
•
Adjust the Speedlite’s manual flash output and the
camera aperture so that the flash exposure level
indicator is aligned with the standard exposure
index.
5
Compose and take the picture.
6
Current flash
exposure level
Standard exposure
index
About 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 550EX is set to C.Fn-3-1, the flash will be fired at full output even in the TTL
autoflash mode.