Nikon D70S - Manual (Page 74)

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.