Canon EOS 5DS Instruction Manual page 136

3 Fine Adjustment of AF's Point of FocusN
Adjust by Lens
You can make the adjustment 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 is 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.
Registered number
136
1 Select [Adjust by lens].
2
Press the <B> button.
The [Adjust by lens] screen will
appear.
3
Check and change the lens
information.
Checking 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's serial number cannot be
confirmed, "0000000000" will be
displayed. In this case, enter the
number by following the instructions
on the next page.
Regarding the asterisk " * " displayed
in front of some lens serial numbers,
see the next page.