Custom Function Settings - Canon Xsi Instruction 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: Auto focus/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, etc. Effective when you prefer to control the
exposure in less fine increments than 1/3-stop increments.
The exposure level will be displayed in the viewfinder and on the LCD
monitor as shown below.
C.Fn-2
0: Auto
The flash sync speed is set automatically within a range of 30 sec. to 1/
200 sec. to suit the scene's brightness.
1: 1/200 sec. (fixed)
The flash picture can be taken without camera shake.
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Exposure level increments
Flash sync. speed in Av (Aperture-priority AE) mode