Nikon D40 User Manual download pdf (Page 40)

28 Reference: More on Photography (All Modes)/Focus

Manual Focus

Use this option when the camera is unable to focus correctly

using autofocus. To focus manually, select manual focus mode

and adjust the lens focusing ring until the image displayed on the

clear matte field in the viewfinder is in focus. Photographs can be

taken at any time, even when the image is not in focus.

When using a lens that offers A-M selection, select M when focusing manually. With lenses

that support M/A (autofocus with manual priority), focus can be adjusted manually with the

lens set to M or M/A. See the documentation provided with your lens for details.

Controls used

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 portion of the subject in

the selected focus area is in focus. After positioning the subject in the

active focus area, press the shutter-release button halfway and rotate the

lens focusing ring until the in-focus indicator (z) is displayed. Note that if

the subject is one for which autofocus does not perform well ( 27), the

in-focus indicator may be displayed when the subject is not in focus. Confirm that the image in the

viewfinder is in focus before shooting.

Focal Plane Position

To determine the distance between your subject and the camera, mea-

sure from the focal plane mark on the camera body. The distance

between the lens mounting flange and the focal plane is 46.5mm

(1.83in.).

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Nikon D40 User Manual Page 40