Custom Function Settings; C.fn I: Exposure; Exposure Level Increments - Canon EOS 1D Instruction Manual

Custom Function Settings

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The Custom Functions are organized in four groups based on the
function type: C.Fn I: Exposure, C.Fn II: Image/Flash exp (exposure)/
Disp (Display), C.Fn III: Auto focus/Drive, C.Fn IV: Operation/Others.
Note that the Custom Function numbers differ from previous
EOS-1D-series cameras.

C.Fn I: Exposure

C.Fn I -1
0: 1/3-stop set
1: 1-stop set
Sets full-stop increments for the shutter speed and aperture.
2: 1/2-stop set
Sets 1/2-stop increments for the shutter speed, aperture, and exposure
compensation.
C.Fn I -2
0: 1/3 stop
1: 1-stop
C.Fn I -3
Disable: The settable ISO speed range will be 100 - 3200.
Enable: The settable ISO speed will range from the highest ISO speed to
the lowest ISO speed set with [Register].
Register: The highest ISO speed can be registered within 100 to H (6400),
and the lowest ISO speed can be registered within L (50) to
3200. After entering the settings, select [Apply].
If the highest ISO speed H (6400) and the lowest ISO speed L (50) are
registered, it will be the same as "ISO speed expansion."
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Exposure level increments

1/3-stop compensation
1/3-stop compensation
1/2-stop compensation
ISO speed setting increments
Set ISO speed range