AF-On/AF start button. Canon also
labels this button as the AF start
button. Pressing the AF-On button
initiates autofocusing in P, Tv, Av,
M, and the C shooting modes in
the same way as half-pressing the
Shutter button. In automatic shoot-
ing modes such as Portrait and
Landscape, pressing this button has
no eff ect. When you're shooting in
Live View, pressing this button
focuses on the subject in any of the
three Live View focusing modes.
AE Lock/FE Lock/Index/Reduce
button. When you're shooting,
pressing this button sets and locks
exposure at the selected AF point.
When you're using the built-in or
an accessory Speedlite fl ash, press-
ing this button sets and locks fl ash
exposure at the selected AF point.
When you're playing back images,
pressing this button displays four
images at a time, and pressing the
button a second time displays an
index of nine images on the LCD
monitor. In Playback mode with an
image magnifi ed, pressing, or
pressing and holding this button
reduces the image magnifi cation.
When you're printing images, press-
ing this button reduces the size of
the trimming frame.
AF-Point Selection/Magnify but-
ton. During shooting, pressing this
button and turning the Main dial
enables you to select a single
AF point or to have the camera
automatically select AF point.
Chapter 1
Roadmap to the EOS 50D
(Automatic AF-point selection is
indicated when all the AF points
are lit in red.) You can also turn the
Quick Control dial or tilt the Multi-
controller to select AF points. The
selected AF point or points are dis-
played in red in the viewfi nder and
by marks on the LCD panel. As you
turn the Main dial, the camera
cycles through the AF points in the
direction you turn the dial. When
playing back images on the CF
card, pressing this button magnifi es
the image by 1.5 to 10x on the LCD
monitor so that you can check
focus or details in the image. To
move around a magnifi ed image,
tilt the Multi-controller.
Multi-controller. The eight-way
Multi-controller functions as a but-
ton when pushed and as a joystick
when tilted in any direction. During
shooting, you can use it to select
an AF point after pressing the
AF-point Selection button. Or you
can press the Multi-controller at the
center to display the Quick Control
screen — a screen that provides
access to primary shooting and
exposure options. Then tilt the
Multi-controller to move through
the functions on the screen. To
change a setting, turn the Quick
Control or Main dial, or press the
Set button to access the function's
setting screen. When working with
camera menus, the Multi-controller
is used to set White Balance shift
settings and to select menu
options.
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