Flash Photography
4
97
Flash Photography with the EOS-Dedicated 550EX Speedlite
Full Auto Flash
This section describes how to use Full Auto E-TTL flash with 〈〉(Program AE) mode. For
instructions for operating the 500EX Speedlite, see the 550EX User’s Guide.
1
Set the Mode Dial to 〈〉.
2
Make sure the 550EX Speedlite’s
pilot lamp is on.
3
Focus the subject, and take the
picture.
● Make sure the flash-ready indicator 〈〉is
on, and check the shutter speed and
aperture value before taking the picture.
Taking Flash Pictures in Each Shooting
Mode
Even in 〈〉, 〈〉, and 〈〉modes, E-TTL autoflash is as easy as normal picture-taking without flash.
(1) Press the shutter button down halfway to have the camera automatically set the shutter
speed or aperture value, just as in normal picture-taking without flash.
(2) Press the shutter button down fully for E-TTL autoflash, using preflash evaluative metering
based on the aperture value set in (1).
(3) The background exposure is determined by the shutter speed and aperture value.
Mode
(Shutter-priority AE)
(Aperture-priority AE)
(Manual exposure)
Shutter speed setting
Manual (30 to 1/200 sec.)
Auto (30 to 1/200 sec.)
Manual (30 to 1/200 sec.)
Aperture (flash aperture) setting
Auto
Manual
Manual
You can set the camera to apply a fixed shutter speed of 1/200 for flash
photography in aperture-priority AE mode. (C.Fn-6 →126)
● Flash photography in 〈〉mode operates the same as in 〈〉mode.
● In the Easy Shooting zone (→20), the 550EX Speedlite operates in Full Auto
mode, with the same functions as the built-in flash.
