Nikon 2178 Camera Lens User Manual


 
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Focusing, zooming, and depth of field
Before focusing, rotate the zoom ring 5 to adjust the
focal length until the desired composition is framed in
the viewfinder.
If your camera has a depth-of-field preview (stop-
down) button or lever, depth of field can be previewed
through the camera viewfinder.
Due to the optical characteristics of this lens, at closer
focus distances, the focal length decreases slightly.
The distance scale does not indicate the precise
distance between the subject and the camera. Values
are approximate and should be used only as a general
guide. When shooting distant landscapes, depth of
field may influence operation so that the camera may
focus at a position that is closer than infinity.
Focusing (Fig. A)
Set your camera’s focus mode selector according to
this chart:
Autofocus with manual override (M/A
mode)
1
Set the lens focus mode switch d to M/A.
2
Autofocus is enabled, but autofocus operation can
be overridden by rotating the separate focus ring
while pressing the shutter-release button halfway,
or by pressing the AF-ON button on the camera
body of cameras so equipped.
3
Press the shutter-release button halfway or the AF-
ON button once again to cancel manual focus and
resume autofocus.
Getting good results with autofocus
Refer to “Notes on using wide- or super wide-angle AF
Nikkor lenses” (P. 21).
Camera’s
focus mode
Lens focus mode
M/A M
AF-A/AF-S/
AF-C
Autofocus with
manual priority
Manual focus (focus
assist is available)
M Manual focus (focus assist is available)