Image Sensor Cleaning - Nikon D3200 Reference Manual

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Press the shutter-release button halfway.
Press the shutter-release button halfway to
focus. The camera will select the focus points
automatically. If the subject is poorly lit, the flash
may pop up and the AF-assist illuminator may light.
Check the indicators in the viewfinder.
When the focus operation is complete, the
selected focus points will be briefly highlighted,
a beep will sound (a beep may not sound if the
subject is moving), and the in-focus indicator (0)
will appear in the viewfinder.
In-focus Buffer
indicator capacity
While the shutter-release button is pressed halfway, the number of exposures
that can be stored in the memory buffer ("_-"; _ 32) will be displayed in the
viewfinder.
7 Shoot.
Smoothly press the shutter-release button the
rest of the way down to release the shutter and
record the photograph. The memory card access
lamp will light and the photograph will be
displayed in the monitor for a few seconds (the
photo will automatically clear from the display
when the shutter-release button is pressed
halfway). Do not eject the memory card or remove
or disconnect the power source until the lamp has
gone out and recording is complete.
Memory card access
lamp
Image Sensor Cleaning
The camera vibrates the low-pass filter covering the image sensor to remove dust when the
camera is turned on or off(_ 180).
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