Canon EOS Rebel XT - Manual (Page 102)

Using EOS-Dedicated, External Speedlites
102
¡ Before attaching an external Speedlite, retract the built-in flash if it is
popped up.
¡ If the EX-series Speedlite’s firing mode is set to TTL autoflash with the
Custom Function, the Speedlite will not fire.
¡ If autofocus cannot be achieved, the external, EOS-dedicated
Speedlite’s AF-assist beam (if the Speedlite has an AF-assist beam) will
be emitted automatically (except in the <
3> <5> <7> modes).
¡ The camera is a Type-A camera that can use all the features of EX-
series Speedlites.
Using Non-Canon Flash Units
The camera can synchronize with compact, non-Canon flash units at 1/
200 sec. or slower. Be sure to test the flash unit beforehand to make
sure it synchronizes properly with the camera.
¡ If the camera is used with a flash unit or flash accessory dedicated to another
camera brand, the camera may not operate properly and malfunction may result.
¡ Do not attach a high-voltage flash unit on the camera’s hot shoe. It might not work.
U LCD Panel Illumination
The LCD panel is provided with
illumination.
To illuminate the LCD panel, press the
<
U> button (9). To turn off the
illumination, press the button again. Use
it to read the LCD panel in the dark.
¡ Pressing any shooting-related button or turning the Mode Dial while the
LCD panel is illuminated prolongs the illumination.
¡ When the camera is connected to a printer and the <
U> button turns
blue, the button functions as a Direct print button. (p.136)