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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.
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