Nikon AF-S NIKKOR 16-35mm f/4G ED VR Manuel D'utilisation page 27

Notes on using wide- or super wide-angle AF NIKKOR lenses
In the following situations, autofocus may not perform as expected when shooting with wide-
or super wide-angle AF NIKKOR lenses.
C A person standing in front of
a distant background
D A field filled with flowers
1. When the main subject in the focus
brackets is relatively small
When a person standing in front of a
distant background is positioned within
the focus brackets, as shown in Fig. C, the
background may be in focus, while the
subject is out of focus.
2. When the main subject is a finely
patterned subject or scene
When the subject is finely patterned or of
low contrast, such as a field filled with
flowers, as shown in Fig. D, focus may be
difficult to acquire using autofocus.
Responses to these types of situations
(1) Focus on a different subject located at the
same distance from the camera, apply
focus lock, recompose, and shoot.
(2) Set the camera's focus mode to manual
focus and focus manually on the subject.
Refer to "Getting Good Results with
Autofocus" in the camera's User's Manual.
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