Canon EOS-1DS MARK III Instruction Manual page 51

Custom Function Settings
The Custom Functions are organized in four groups based on the
function type: C.Fn I: Exposure, C.Fn li: ImagetFlash exp (exposure)l
Disp (Display), C.Fn Ill: Auto focustDdve, C.Fn IV: OperationlOthers.
Note that the Custom Function numbers differ from previous
EO$-lDsosedes cameras.
C,Fn I: Exposure
0: lt3=stop set 1/3=stop compensation
1:1 =stop set 1/3=stop compensation
Sets full-stop increments for the shutter speed and aperture.
2: lt2=stop set 1/2=stop compensation
Sets 1/2-stop increments for the shutter speed, aperture, and exposure
compensation.
0:1/3 stop
1:1 =stop
Disable: The settable ISO speed range will be 100 - 1600.
Enable: The settable ISO speed will range from the highest ISO speed to
the lowest ISO speed set with [Register].
Register: The Mghest ISO speed can be registered within 100 to H (3200),
and the lowest ISO speed can be registered witMn L (50) to
1600. After entering the settings, select [Apply].
_ !f the highest !SO Speed H (3200)and the lowest iSO speed L (50)are
registered, it wi!! be the same as "!SO speed expansion,"
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