64
Taking Photographs—Focus
Focus
Controlling How the Camera Focuses
This section describes the options that control how your camera focuses:
fo cus mode, focus-area selection, and AF-area mode.
Focus Mode
Focus mode is controlled by the focus mode se-
lec tor on the front of the camera. Two modes are
available:
VIDEO
OUT
VIDEO
OUT
Camera focuses automatically when shutter-release button is pressed
half way. Operation depends on option selected for Custom Setting 2
(
Autofocus
;
139):
•
AF-S
(single-servo autofocus): When camera focuses, beep sounds
and in-focus indicator (
●
) appears in view fi nd er. Focus re mains locked
while shutter-release button is pressed halfway (
focus lock
). Shut ter
can only be re leased when in-fo cus in di ca tor is dis played (
focus pri-
or i ty
). If sub ject was mov ing when shutter-release button was pressed
half way, cam era will track sub ject until fo cus ing is complete and the
shut ter can be re leased (
pre dic tive fo cus tracking
;
65). If subject
stops mov ing before shutter is released, in-focus in di ca tor will ap pear
in viewfi nder and focus will lock at this dis tance.
•
AF-C
(continuous-servo autofocus): Camera focuses continuously
while shutter-release but ton is pressed halfway. If subject moves, fo-
cus will be adjusted to compensate (
predictive fo cus tracking
;
65).
Pho to graphs can be taken whether or not camera is in focus (
release
priority
).
AF
Autofocus
Description
Option
Camera does not focus automatically; focus must be adjusted manually
using the lens focusing ring. If max i mum aperture of lens is f/5.6 or
faster, view fi nd er fo cus in di ca tor can be used to con fi rm focus (
elec-
tronic range fi nd ing
;
74), but photographs can be taken at any time,
wheth er or not camera is in focus.
M
Man u al
Choosing single-servo AF ensures a sharp, focused image. Continuous-servo
AF may be a better choice with erratically-moving subjects. Man u al fo cus is
rec om mend ed when the cam era is unable to focus using autofocus.
Содержание D70s
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