Canon EOS REBEL T4I Instruction Manual page 25

Appending Dust Delete Data*
,3
Photograph a solid=white object.
®_At a distance of 20 cm - 30 cm (0.7 ft.
- 1.0 ft.), fill the viewfinder with a
patternless, solid-white object and
take a picture.
_y,, T he picture will be taken in aperture-
priority AE mode at an aperture of f/22.
®_Since the image will not be saved, the
data can still be obtained even if there
is no card in the camera.
_y,, W hen the picture is taken, the camera
will start collecting the Dust Delete
Data. When the Dust Delete Data is
obtained, a message will appear. Select
[OK], and the menu will reappear.
_ If the data was not obtained
successfully, a message to that effect
will appear. Follow the "Preparation"
procedure on the preceding page, then
select [OK]. Take the picture again.
About the Dust Delete Data
After the Dust Delete Data is obtained, it is appended to all the JPEG
and RAW images captured thereafter. Before an important shoot, it is
recommended to update the Dust Delete Data by obtaining it again.
For details about using Digital Photo Professional (provided software,
p.350) to erase dust spots, refer to the Software Instruction Manual
(p.352) on the Software Instruction Manual CD-ROM.
The Dust Delete Data appended to the image is so small that it hardly
affects the image file size.
O Be sure to use a S01id-whiieObjeCt S uchas a new Sheei ef white paper if ihe
paper has any pattern or design,it may be recognized as dust data and
affect the accuracy of the dust deletion with the softwarel
221