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Full Auto E-TTL autoflash used with the < > Program AE mode is
described here. For details on Speedlite 550EX operations, see the
Speedlite 550EX Instructions booklet.
Even in the , , and modes, E-TTL autoflash is as easy as normal
picture-taking without flash.
(1)
When you press the shutter button halfway, the shutter speed and
aperture are set by the camera as with normal picture-taking without flash.
(2)
When you press the shutter button completely, preflash evaluative
metering based on the aperture set in (1) is used for the E-TTL
autoflash exposure.
(3)
The background exposure is set by the shutter speed and aperture
combination.
85
Flash Photography with Speedlite 550EX
Full Auto Flash
E-TTL Autoflash in Other Shooting Modes
1
Set the camera’s shooting mode
to .
2
Check that the 550EX’s pilot lamp
is lit.
3
Focus the subject.
4
Take the picture.
• Make sure the flash-ready indicator
is on, and check the shutter speed
and aperture before taking the
picture.
Mode Shutter Speed Setting Flash Aperture Setting
(Shutter speed-priority AE)
Manual (30 sec. - 1/250 sec.)
Auto
(Aperture-priority AE)
Auto (30 sec. - 1/250 sec.)
Manual
(Manual)
Manual (30 sec. - 1/250 sec.)
Manual
SEC.06 P083-094 (E) 29-01-2003 12:38 Pagina 85