Canon eos rebel g - Manual (Page 54)

V. E-TTL Autoflash with an EX-Series Speedlite
- -up*: :ate—** “ ---- 1 — ■ '
High-Speed Sync (FP Flash)
With the Speedlite’s high-speed sync switch set to
V h
, high-speed sync
(focal-plane flash) is set automatically when the shutter speed is set faster
than 1/90 sec. The Speedlite can then synchronize with all shutter
speeds. When high-speed sync is in effect, “H" is displayed on the right of
i in the viewfinder.
High-speed sync is effective in the
following cases:
1 When you want to use fill-in flash
for a portrait and maintain
background blur with a large
aperture.
2 When you want to produce a
catchlight in the subject’s eyes.
3 When you want to use fill-in flash to
eliminate shadows
* High-speed sync can be used only in Creative Zone modes. In Programmed Image Control
modes, the normal sync speed is set.
■ When high-speed sync is used, the Speedfite’s Guide No. decreases. If the ambient light is
insufficient, using high-speed sync may result in underexposure.
FE Lock
FE (flash exposure) lock obtains and locks the correct flash exposure for
the desired portion of the scene.
FE lock operates only in Creative Zone modes, and the camera’s AE lock
button functions as an FE lock button.
Turn the Command Dial to a
Creative Zone mode.
O Check that the Speedlite’s 'lamp is
^ lit.
• The flash mode can be either normal or
high-speed sync (FP fiash). FE lock will
work with either mode.