Canon EOS Rebel T3 18-55mm IS II Kit, Instruction Manual

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Custom Functions are organized into four groups based on the function
type: C.Fn I: Exposure, C.Fn II: Image, C.Fn III: Autofocus/Drive, C.Fn
IV: Operation/Others.
3
Custom Function Settings
N
C.Fn I: Exposure
C.Fn-1 Exposure level increments
0: 1/3-stop
1: 1/2-stop
Sets 1/2-stop increments for the shutter speed, aperture, exposure
compensation, AEB, flash exposure compensation, etc. Effective when
you prefer to control the exposure in less fine increments than 1/3-stop
increments.
C.Fn-2 Flash sync. speed in Av mode
When you use flash in the aperture-priority AE mode (
f
), you can set the
flash sync speed.
0: Auto
The flash sync speed is set automatically within a range of 1/200 sec. to
30 sec. to suit the scene’s brightness. With an external Speedlite, high-
speed sync will also be possible.
1: 1/200-1/60 sec. auto
Prevents a slow shutter speed from being set in low-light conditions. It is
effective for preventing subject blur and camera shake. However, while
the subject will be properly exposed with the flash, the background may
come out dark.
2: 1/200 sec. (fixed)
The flash-sync speed is fixed to 1/200 sec. This more effectively
prevents subject blur and camera shake than with setting 1. However,
the background may come out darker than with setting 1.
With setting 1, the exposure level will be displayed in the viewfinder and on
the LCD monitor as shown below.
When 1 or 2 is set, high-speed sync cannot be used with an external
Speedlite.
COP
Y