Custom Function Settings - Canon REBEL T3I EOS 600D User Manual

Custom Function SettingsN
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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.
C.Fn I: Exposure
C.Fn-1
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.
With setting 1, the exposure level will be displayed in the viewfinder and on
the LCD monitor as shown below.
C.Fn-2
0: Off
1: On
For the ISO speed, "H" (equivalent to ISO 12800) will be selectable.
Note that if [C.Fn-6: Highlight tone priority] has been set to [1:
Enable], "H" cannot be set.
C.Fn-3
When you use flash in the aperture-priority AE mode (Av), 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 is also 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.
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Exposure level increments
ISO expansion
Flash sync. speed in Av (Aperture-priority AE) mode