Flash Photography With Speedlite 550Ex - Canon EOS-3 Instructions Manual

1. Flash Photography with Speedlite 550EX

With Speedlite 550EX attached to the EOS-3, flash photography is as
easy as any AE mode. You can also use the following features:
(1) E-TTL Autoflash
With E-TTL autoflash (preflash evaluative
metering), optimum flash exposure can be
obtained for the subject in focus. In the
aperture-priority AE mode, a slow sync
speed is set automatically in low-light
situations to obtain a natural-looking,
balanced exposure between the subject and
background.
(2) High-Speed Sync (FP Flash)
High-speed sync (FP or focal-plane flash) enables flash synchronization with all shutter
speeds from 30 sec. to 1/8000 sec.
(3) FE (Flash Exposure) Lock
FE lock obtains and locks the correct flash exposure for any part of the subject. This is the
flash equivalent of AE lock.
(4) Flash Exposure Compensation
Like normal exposure compensation, flash exposure compensation can be used to set the
flash output up to ±3 stops in 1/3-stop increments.
(5) FEB (Flash Exposure Bracketing)
As with AEB (autoexposure bracketing), flash exposures can also be bracketed up to ±3
stops in 1/3-stop increments.
(6) Wireless Multi-flash E-TTL
For sophisticated lighting effects, multiple wireless Speedlites can be used for E-TTL
autoflash. All features (1) to (5) above can be used. The operation is as simple as using a
Speedlite directly attached to the camera.
E-TTL is an abbreviation for Evaluative-Through-The-Lens.
• With autofocus, the flash exposure is always based on the aperture (set
automatically or manually) and autoflash metering is weighted at the current
focusing point.
• When it is difficult to autofocus, the 550EX's built-in AF-assist beam is emitted
automatically. The beam is linked to the area AF.
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