Nikon 1 J5 Reference Manual page 259

The Electronic Rangefinder
If a CPU lens is attached in manual focus
mode, the focus indicator can be used to
check whether the camera is focused on
the subject in the center focus area.
Focus indicator
I
In focus.
F
Camera focused in front of subject.
H Camera focused behind subject.
F H
Unable to determine focus.
(flashes)
Note that with some subjects, the in-focus indicator (I) may be
displayed when the camera is not in focus. Check focus in the
display before shooting.
Error Messages and Displays
The following warnings appear in the camera aperture display.
Display
Lens aperture ring is not
FEE
locked at minimum aperture.
Non-CPU lens is attached, or
F––
no lens is attached.
Problem
Status
Solution
When using CPU lenses, lock
aperture ring at minimum aper-
ture (highest f-number).
When using non-CPU lens, rotate
lens aperture ring to adjust aper-
ture.
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