Nikon N80QD - F80 QD Quartz Databack User Manual

88
About Depth of Field and Focus Tracking
This camera is equipped with autofocus where focusing is
automatically executed by the camera. Basics of the relationship
between focus and depth
of field and Focus Tracking are
explained
in this section .
• Depth of field
When focusing, depth of field should be considered. Depth of field is the
zone of sharpest focus
in front of and behind the subject on which the
lens
is focused. It varies according to shooting distance, focal length and,
above all, aperture. Smaller apertures (larger f-numbers) will produce a
deeper depth of field where the background and foreground become
sharper; larger apertures (smaller f-numbers) will produce a shallower
depth of field where the background becomes blurred. Similarly, shorter
shooting distance or longer focal length will produce a shallower depth of
field, and longer shooting distance or shorter focal length will produce a
deeper depth of field. Note that depth of field tends to be shallower
in
front of and deeper behind the subject in focus .
• Focus Tracking
When the focus mode selector is set to Single Servo AF (S) or Continuous
Servo
AF (C) and the shutter release button is lightly pressed or AE-UAF-
L button (when
AF start in CSM : : is selected) is kept pressed, the
camera automatically switches to Focus Tracking when a moving subject
is detected. Focus Tracking enables the camera to analyze the speed of
the moving subject according to the focus data detected, and to obtain
correct focus by anticipating the subject's
position-and driving the lens
to that
position-at the exact moment of exposure.
In Single Servo AF , Focus Tracking is activated with a subject that has
been moving
in advance to the focus detection, and focus is locked when
the subject stops moving
and. appears in the viewfinder. In Continuous
Servo
AF , camera continues to track subject (even with a subject which
started moving
in the middle of the focus detection) and focus is not
locked.
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Nikon N80QD - F80 QD Quartz Databack Specifications

General

Brand	Nikon
Model	N80QD - F80 QD Quartz Databack
Category	Film Camera
Language	English