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Nikon D3100 User Manual

Nikon D3100
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80
t
Autoexposure Lock
Use autoexposure lock to recompose photographs after metering exposure:
1 Set metering to M or N (0 79).
L will not produce the desired results.
Note that
autoexposure lock is not available in i or j mode.
2 Lock exposure.
Position the subject in the selected focus point and press
the shutter-release button halfway.
With the shutter-
release button pressed halfway and the subject positioned
in the focus point, press the AE-L/AF-L button to lock focus
and exposure.
While exposure lock is in effect, an AE-L indicator will
appear in the viewfinder.
3 Recompose the photograph.
Keeping the AE-L/AF-L button pressed, recompose the photograph and shoot.
A The Shooting Menu
Metering can also be adjusted using the Metering option in the
shooting menu (0 131).
A Adjusting Shutter Speed and Aperture
While exposure lock is in effect, the following settings can be
adjusted without altering the metered value for exposure:
Mode Setting
Programmed auto Shutter speed and aperture (flexible program; 0 74)
Shutter-priority auto Shutter speed
Aperture-priority auto Aperture
The metering method itself can not be changed while exposure lock is in effect.
A See Also
If On is selected for Buttons > AE lock in the setup menu (0 146), exposure will lock when
the shutter-release button is pressed halfway.
For information on changing the role of the
AE-L/AF-L button, see Buttons > AE-L/AF-L button.
Shutter-release
button
AE-L/AF-L button

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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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