Full auto flash, Set the mode dial to
Page 97: Focus the subject, and take the picture, Taking flash pictures in each shooting mode
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Flash Photography with the EOS-Dedicated 550EX Speedlite
Full Auto Flash
This section describes how to use Full Auto E-TTL flash with ( P ) (Program AE) mode. For
instructions for operating the 550EX Speedlite, see the 550EX User’s Guide.
Set the Mode Dial to
.
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i
S.S
Make sure the 550EX Speedlite’s
pilot lamp is on.
Focus the subject, and take the
picture.
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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
(Tv), (Av), and (M) 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.
Mode
Shutter speed setting
Aperture (flash aperture) setting
Tv (Shutter-priority AE)
Manual (30 to 1/200 sec.)
Auto
Av (Aperture-priority AE)
Auto (30 to 1/200 sec.)
Manual
M (Manual exposure)
Manual (30 to 1/200 sec.)
Manual
(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.
Flash photography in
(A-DEP) mode operates the same as in (P) mode.
# In the Easy Shooting zone (->-20), the 550EX Speedlite operates in Full Auto
mode, with the same functions as the built-in flash.
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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)
97