Nikon D3400 Reference Manual - English - Page 106

❚❚ The Electronic Rangefinder (Viewfinder Photography) 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 (I) is displayed. Note that with the subjects listed on page 72, the infocus indicator may sometimes be displayed when the subject is not in focus; confirm focus in the viewfinder before shooting. A Selecting Manual Focus with the Camera If the lens supports M/A (autofocus with manual override) or A/M (autofocus with manual override/AF priority), manual focus can also be selected by setting the camera focus mode to MF (manual focus; 0 69). Focus can then be adjusted manually, regardless of the mode selected with the lens. 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.). 46.5 mm Focal plane mark 82 More on Photography