Nikon 70-200mm-f4G-ED-AF-S-VR-Zoom-Nikkor - Manual (Page 15)

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A/M (Autofocus with Manual Override/AF Priority)
To focus using autofocus with manual override (A/M):
z Slide the lens focus-mode switch to A/M.
x Focus.
If desired, autofocus can be over‑ridden by rotating the lens focus
ring while the shutter‑release button is pressed halfway (or, if the
camera is equipped with an AF-ON button, while the AF-ON button
is pressed); note that the ring must be rotated a short distance before
autofocus is over‑ridden. To refocus using autofocus, press the
shutter‑release button halfway or press the AF-ON button again.
The Focus Limit Switch
This switch determines the focus distance limits for autofocus.
FULL: Select this option for subjects that may be closer than
3 m (. ft).
∞–3 m: If your subject will always be at distance of at least
3 m (. ft), select this option for faster focusing.
Zoom and Depth of Field
Before focusing, rotate the zoom ring to adjust the focal length and frame
the photograph. If the camera offers depth‑of‑field preview (stop down),
depth of field can be previewed in the viewfinder (see page 210 for more
information).
Note: Note that the focus distance indicator is intended only as a guide and
may not accurately show the distance to the subject and may, due to depth
of field or other factors, not show ∞ when the camera is focused on a distant
object.
Aperture
Aperture is adjusted using camera controls.
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