Nikon D3100 User Manual page 56

II
Flash Modes
The flash modes listed on the previous page may combine one or more of the following
settings, as shown by the flash mode icon:
• AUTO (auto flash): When lighting is poor or subject is back lit, flash pops up automatically
when shutter-release button is pressed halfway and fires as required.
• @
(red-eye reduction): Use for portraits. Red-eye reduction lamp lights before flash fires,
reducing "red-eye:'
• ®
(off): Flash does not fire even when lighting is poor or subject is back-lit.
• SLOW (slow sync): Sh utter speed slows automatically to ca pture backgrou nd Iig hting at nig ht
or under low light. Use to include background lighting in portraits.
• REAR (rear-curtain sync): Flash fires just before shutter closes, creating a stream of light behind
moving light sources (below at right). If this icon is not displayed, flash will fire as the
shutter opens (front-curtain sync; the effect this produces with moving light sources is
shown below at left).
Front-curtain sync Rear-curtain sync
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Choosing a Flash Mode
The flash mode can also be
selected by pressing the
~ ~
button and rotating the
~ ~
+
command dial (in P, S, A, and M
modes, raise the flash before
~
using the
~
button to choose the
'--'-----_l....l...ll~~
flash mode).
~
button Command dial
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The Built-in Flash
For information on the lenses that can be used with the built-in flash, see the Reference
Manual (on CD). Remove lens hoods to prevent shadows. The flash has a minimum range of
0.6 m (2 ft.) and can not be used in the macro range of macro zoom lenses.
The shutter release may be briefly disabled to protect the flash after it has been used for
several consecutive shots. The flash can be used again after a short pause.
II
Shutter Speeds Available with the Built-in Flash
Shutter speed is restricted to the following ranges when the built-in flash is used:
Mode
00, -So, ~,
P, A
Shutter speed
;-------- i/ 200 "jj60S -
s
Mode
S
M
Shutter speed
"~-
.•.
~-
..
_~
•..
~.---.,---~-
.•.
--.---
11200-30 s
50