Canon EOS 1V Troubleshooting Guide Page 84

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With Speedlite 550EX, flash photography is easy as any AE mode, and you
can use the following features:
E-TTL autoflash
With E-TTL autoflash (preflash evaluative
metering), optimum flash exposure is
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.
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.
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.
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.
FEB (Flash Exposure Bracketing)
As with AEB (autoexposure bracketing), flash exposures can be
bracketed up to ±3 stops in 1/3-stop increments.
•E-TTL wireless autoflash with multiple Speedlites
E-TTL autoflash can also be implemented with multiple wireless
Speedlites. All the features listed above can be used, and no connections
codes are required. Sophisticated lighting effects can be obtained as
easily as using a Speedlite directly attached to the camera.
84
Flash Photography with Speedlite 550EX
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 active focusing point in the Area AF.
SEC.06 P083-094 (E) 29-01-2003 12:38 Pagina 84
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