Canon Speedlite 470EX-AI Instruction Manual page 26

E-TTL II/E-TTL Autoflash by Shooting Mode
Auto Zoom Adjustment to Image Sensor Size
EOS DIGITAL cameras have three sizes of image sensors, and the
effective shooting angle of view of the attached lens varies depending
on the size of image sensor. 470EX-AI automatically recognizes the
image sensor size of the EOS DIGITAL camera and automatically sets
the flash coverage that is ideal for the effective shooting angle of view of
a lens for the focal length range of 24-105mm.
Color Temperature Information Transmission
This function adjusts the white balance depending on the color
temperature of the flash light by transmitting the color temperature
information to the EOS DIGITAL camera when the flash fires. When you
set the camera's white balance to <A>, <Aw>, or <Q>, the
function is enabled automatically.
Refer to the specifications in your camera's Instruction Manual to find
out if it is compatible with this function.
Bounce Function
See Chapter 3, "Bounce Flash Photography" (p.41-64).
When the <X> bounce mode switch is set to the <0°> position and the
flash head is facing a direction other than straight forward, the <X> lamp
blinks. Pressing the shutter button halfway automatically returns the position
of the flash head to the forward-facing position. (The <X> lamp turns off.)
26