Nikon D3100 User Manual

Page 205

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189

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Focus does not lock when shutter-release button is pressed halfway

: Use AE-L/AF-L button to lock focus

when live view is off and AF-C is selected for focus mode or when photographing moving
subjects in AF-A mode (

0 60).

Can not select focus point

:

e Auto-area AF selected for AF-area mode > Viewfinder (0 58), or Face-priority AF
selected for AF-area mode > Live view/movie (

0 38): choose another mode.

Press shutter-release button halfway to turn monitor off or activate exposure meters (

0 27).

Subject-tracking AF not available

: Select a non-monochrome Picture Control (

0 94).

Can not select AF-area mode

: Manual focus selected (

0 38, 55).

Image size can not be changed

: Image quality set to NEF (RAW) or NEF (RAW) + JPEG fine (

0 65).

Camera is slow to record photos

: Turn noise reduction off (

0 134).

Noise (randomly-spaced bright pixels, fog, or lines) appear in photos

:

Choose lower ISO sensitivity or turn noise reduction on (

0 134).

Shutter speed is slower than 8 s: use noise reduction (

0 134).

Smudges appear in photographs

: Clean front and rear lens elements. If problem persists, perform

image sensor cleaning (

0 180).

Date is not imprinted on photos

: Image quality set to NEF (RAW) or NEF (RAW) + JPEG fine (

0 65,

147).

Sound is not recorded with movies

: Off is selected for Movie settings > Sound (

0 47).

Flicker or banding appears during live view or movie recording

: Choose an option for Flicker reduction

that matches the frequency of the local AC power supply (

0 139).

Menu item can not be selected

: Some options are not available in all modes.

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