Function Settings; C,Fn I: Exposure - Canon EOS REBEL XS Instruction Manual

Custom Function Settings*
Custom Functions are organized into four groups based on the function
type: C.Fn I: Exposure, C.Fn I1: Image, C.Fn II1: Auto focus/Drive, C.Fn
IV: Operation/Others.
C,Fn I: Exposure
0: l/3ostop
1: l/2ostop
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_
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.
1:11200 sec. (fixed)
If you use the <Av> mode (aperture-priority AE) for flash photography,
the shutter speed will be set to 1/200 sec. You need not worry about
camera shake.
(However, night scene or dark backgrounds will look darker in this
mode.)
154