Nikon D800 User Manual (en)

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En_03
102
N
The Electronic 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 
51 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 (
I) is displayed. Note that with 
the subjects listed on page 100, the in-
focus indicator may sometimes be 
displayed when the subject is not in focus; 
confirm focus in the viewfinder before 
shooting.
A
Focal Plane Position
To determine the distance between 
your subject and the camera, measure 
from the focal plane mark (
E) 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
 46.5 mm