Canon eos rebel g - Manual (Page 52)

V. E-TTL Autoflash with an EX-Series Speed!ite
With an EX-series Speedlite like the 380EX or 220EX, flash photography is
easy with the E-TTL (Evaluative-Through-The-Lens) autoflash system which
is linked to the active focusing point. It is as easy as using the built-in flash.
An external Speedlite is recommended when a high flash output is
required for group shots and special lighting effects.
E-TTL Autoflash System
Features
(1) Since the E-TTL autoflash system (with
preflash evaluative metering) is linked
to the active focusing point, proper flash
exposure is obtained for the subject in
focus.
(2) Even for fill-flash and indoor situations,
a natural-looking flash exposure is
obtained automatically.
(3) With the Command Dial set to Av, a slow sync speed is set automatically in
low-light situations to obtain a balanced exposure between the subject and
background.
(4) FE (Flash Exposure) lock enables you to lock the correct flash exposure for
any part of the picture.
(5) High-speed sync (FP or Focal-Plane flash) can be used to synchronize the
flash with all shutter speeds from 30 sec. to 1/2000 sec.
(6) In a Creative Zone mode, the aperture and shutter speed (1/90 sec. or slower)
can be set manually.
(7) With multi-flash accessories, multiple Speedlites can be used automatically
with the TTL autoflash system which is linked to the active focusing point. *
* In the AF mode, the flash output is controlled automatically to match the flash aperture.
Since the flash metering is linked to the focusing point, the E-TTL autoflash system weights
the Hash exposure on the subject in fucus.
* When the Speedlite is on in the Full Auto mode or a Programmed Image Control mode, the
flash fires each time a picture is taken,
■ The camera’s red-eye reduction lamp operates even when an external EOS-dedicated
Speedlite has been attached to the camera.
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