Nikon S3100 - Manual (Page 39)

27
Step 3 Focus and Shoot
Bas
ic Ph
otography an
d Pl
ayba
ck
: A
(Auto)
M
o
de
B
During Recording
While pictures are being recorded, the number of exposures remaining will blink. Do not open the
battery-chamber/memory card slot cover
while pictures are being recorded. Cutting power or
removing the memory card in these circumstances could result in loss of data or in damage to the
camera or card.
B
Autofocus
Autofocus may not perform as expected in the following situations. In some rare cases, the subject
may not be in focus despite the fact that the focus area or the focus indicator glows green:
• Subject is very dark
• Objects of sharply differing brightness are included in the scene (e.g. the sun behind the subject
makes that subject appear very dark)
• No contrast between the subject and surroundings (e.g. a portrait subject, wearing a white shirt, is
standing in front of a white wall)
• Several objects are at different distances from the camera (e.g. the subject is inside a cage)
• Regular geometric patterns (e.g. window blind or windows in a skyscraper)
• Subject is moving rapidly
In the situations noted above, try pressing the shutter-release button halfway to refocus several
times, or focus on another subject and use focus lock (
A 47). When using focus lock, be sure that
the distance between the camera and the subject with which focus was locked is the same as that
for the actual subject.
B
When the Subject Is Close to the Camera
If the camera cannot focus, try shooting with macro mode ( A 34) or the Close-up scene mode
( A 59).
B
Note on Face Detection
See
AF area mode (A 46) and “Face Detection” (A 48) for more information.
D
AF-assist Illuminator and Flash
If the subject is poorly lit, the AF-assist illuminator ( A 146) may light when the shutter-release
button is pressed halfway, or the flash ( A 31) may fire when the shutter-release button is pressed
all the way down.