Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 241)

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Appending Dust Delete Data
Dust Delete Data used to erase dust spots can be appended to images in
case sensor cleaning leaves dust on the sensor. The Dust Delete Data is
used by Digital Photo Professional (EOS software) to erase the dust spots
automatically.
Preparation
 Prepare a solid white object such as a sheet of paper.
 Set the lens focal length to 50 mm or longer.
 Set the lens’s focus mode switch to < MF > and set the focus to infi nity (∞).
Dust Delete Data Acquisition
1 Select [ z : Dust Delete Data].
2 Select [OK].
 After the automatic self-cleaning of
the sensor is performed, a message
will appear. Although there will be a
mechanical sound of the shutter during
the cleaning, no picture is taken.