Nikon D3000 User Manual page 44

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Check the number of exposures
remaining.
The information display and viewfinder show
the number of photographs that can be stored
on the memory card. Check the number of
exposures remaining.
If there is not enough memory to store
additional photographs at current settings, a
warning will be displayed. No further pictures
can be taken until the memory card has been
replaced (_ 20) or photographs have been
deleted (_ 33, 101).
When enough memory remains on the memory
card to record a thousand or more pictures at
current settings, the number of exposures
remaining will be shown in thousands, rounded
down to the nearest hundred (e.g., if there is
room for 1,260 exposures, the exposure count
display will show 1.2 K).
[] Auto Meter Off
At default settings, the viewfinder and information display will turn off if no operations are
performed for about eight seconds (auto meter off), reducing the drain on the battery. Press
the shutter-release button halfway to reactivate the display (_ 29).
8, %
Exposuremeters on Exposuremeters off Exposuremeters on
The length of time before the exposure meters turn off automatically can be adjusted using
the Auto off timers option in the setup menu (_ 130).
[] Image Sensor Cleaning
At default settings, the camera vibrates the low-pass filter covering the image sensor to
remove dust when the camera is turned on or off (_ 170).
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