Nikon D5000 User Manual page 79

II TheElectronic Rangefinder
If the lens has a maximum aperture of f/5.6 or faster, the
viewfinder focus indicator can be used to confirm whether
the subject in the selected focus point is in focus (the focus
point can be selected from any of the 11 focus points).
After positioning the subject in the selected focus point,
press the shutter-release button halfway and rotate the
lens focus ring until the in-focus indicator (Q) is displayed.
Note that with the subjects listed on page 55, the in-focus
indicator may sometimes be displayed when the subject is
not in focus; confirm focus in the viewfinder before
shooting.
[] Focal Plane Position
To determine the distance between your subject and the camera,
measure from the focal plane mark on the camera body. The
distance between the lens mounting flange and the focal plane
is 46.5 mm (1.83 in.).
Focal plane mark
[] The Exposure Indicator
If desired, the exposure indicator can be used to determine whether the focus point for
manual focus is in front of or behind the subject (_ 156).
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