Nikon D810 - Manual (Page 256)

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To recall lens data when using a non-CPU lens:
1
Assign non-CPU lens number selection to a camera control.
Select Choose non-CPU lens number as the “Press +
command dials” option for a camera control in the Custom
Settings menu (0 348). Non-CPU lens number selection can
be assigned to the Fn button (Custom Setting f4, Assign Fn
button, 0 343), the Pv button (Custom Setting f5, Assign
preview button, 0 349), or the A AE-L/AF-L button (Custom
Setting f6, Assign AE-L/AF-L button, 0 349).
2
Use the selected control to choose a lens number.
Press the selected button and rotate the main or sub-
command dial until the desired lens number is displayed in
the control panel.
Focal length
Maximum
aperture
Fn
button Main command
dial
Lens number