Canon EOS-1DX Instruction Manual page 109

Adjust by Lens
You can perform AF Microadjustment for each lens and register the
adjustment in the camera. You can register the adjustment for up to 40
lenses. When you autofocus with a lens whose adjustment has been
registered, the point of focus will always be shifted by the adjustment
amount.
Set the adjustment manually by adjusting, shooting, and checking the
result. Repeat this until the desired adjustment is made. If you use a zoom
lens, make the adjustment for the wide-angle (W) and telephoto (T) ends.
3 Fine Adjustment of AF's Point of Focus
1
Select [Adjust by lens].
Turn the <5> dial to select [Adjust
by lens].
2
Press the <B> button.
The [Adjust by lens] screen will
appear.
3
Check and change the lens
information.
Check the lens information.
Press the <B> button.
The screen will show the lens name and a 10-
digit serial number. When the serial number is
displayed, select [OK] and go to step 4.
If the lens' serial number cannot be
confirmed, "0000000000" will be displayed.
Enter the number as indicated below. See
the next page about the asterisk " * "
displayed in front of the lens serial number.
109