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Nikon D3100 Reference Manual

Nikon D3100
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56
z
3 Choose a focus mode.
Highlight a focus mode and press J.
To return
to shooting mode, press the shutter-release
button halfway.
D Continuous-servo Autofocus
In AF-C mode or when continuous-servo autofocus is selected in AF-A mode, the camera gives
higher priority to focus response (has a wider focus range) than in AF-S mode, and the shutter
may be released before the in-focus indicator is displayed.
A Getting Good Results with Autofocus
Autofocus does not perform well under the conditions listed below.
The shutter release may
be disabled if the camera is unable to focus under these conditions, or the in-focus indicator
(I) may be displayed and the camera may sound a beep, allowing the shutter to be released
even when the subject is not in focus.
In these cases, focus manually (0 62) or use focus lock
(0 60) to focus on another subject at the same distance and then recompose the
photograph.
There is little or no contrast
between the subject and the
background.
Example: Subject is the same
color as the background.
The focus point contains
areas of sharply contrasting
brightness.
Example: Subject is half in
the shade.
The focus point contains
objects at different distances
from the camera.
Example: Subject is inside a
cage.
Background objects appear
larger than the subject.
Example: A building is in the
frame behind the subject.
The subject is dominated by
regular geometric patterns.
Example: Blinds or a row of
windows in a skyscraper.
The subject contains many
fine details.
Example: A field of flowers or
other subjects that are
small or lack variation in
brightness.

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Nikon D3100 Specifications

General IconGeneral
Megapixel14.2 MP
Camera typeSLR Camera Body
Sensor typeCMOS
Image stabilizerNo
Image sensor size- \
Maximum image resolution4608 x 3072 pixels
Image sensor size (W x H)23.1 x 15.4 mm
Still image resolution(s)-
Digital zoom- x
Focal length range- mm
InterfaceUSB
Digital SLRYes
Power source typeBattery
Dimensions (WxDxH)124 x 96 x 74.5 mm
Camera shutter speed1/4000 - 30 s
Effective sensor resolution14800000 pixels
Auto focusing (AF) modesSingle Auto Focus
ISO sensitivity100, 200, 400, 800, 1600, 3200, Auto
Light exposure modesaperture priority AE, auto, manual, shutter priority AE
Flash modesAuto, Flash off, Red-eye reduction, Slow synchronization
Internal memory- MB
Compatible memory cardsSD, SDHC, SDXC
Motion JPEG frame rate30 fps
Maximum video resolution1920 x 1080 pixels
Field of view95 %
Display diagonal3 \
Display resolution (numeric)230000 pixels
Magnification0.8 x
USB version2.0
Scene modesChildren, Close-up (macro), Portrait
Photo effectsBlack&White
White balanceAuto, Manual
Self-timer delay10 s
Product colorBlack
Fastest camera shutter speed1/4000 s
Slowest camera shutter speed30 s
Weight and Dimensions IconWeight and Dimensions
Depth96 mm
Width124 mm
Height74.5 mm
Weight505 g

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