Page 92 - (DK) Advanced Photography Guide

90 APPLYING | MANUAL FOCUS

MAXIMIZING DEPTH OF FIELD

The distance between the areas of an image that are the point on which you focus to achieve maximum
acceptably sharp behind and in front of the focus depth of field. Depth of field will then extend from
point is referred to as depth of field (DOF). This one-half of the focused distance to infinity. The
extends twice as far behind the focus point as it hyperfocal distance varies depending on aperture,
does back toward the camera. One way to ensure focal length, and sensor size. Apps that use these
that depth of field is used effectively is to focus variables to calculate the hyperfocal distance are
on a point known as the hyperfocal distance. This is widely available.

CALCULATE
Camera
THE HYPER-
FOCAL DISTANCE
Enter the camera and
lens variables into a
DOF app to calculate
Hyperfocal distance the hyperfocal
distance. Make a
Hyperfocal near limit
note of this value.
DOF near limit
DOF far limit
SELECT APERTURE SET THE APERTURE
PRIORITY For landscape photos, Depth of field
To have control over the select a mid-to-large range Depth of field in front
aperture, and thus the depth aperture setting, such as f/8 Depth of field behind
of field, that is needed for the or f/11, especially if you are
hyperfocal distance technique, using a wide-angle lens.
select Aperture Priority.

SELECT MANUAL FOCUS FOCUS AT THE HYPERFOCAL DISTANCE
Use either the AF/M switch on the camera You need to focus the lens at the calculated hyper-
body or lens, or the camera’s focusing menu option focal distance. If your lens does not have a distance scale,
screen to select manual focus. you will have to estimate the distance visually and focus
on a feature in the scene at this approximate distance.

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