Canon Eos Rebel T3i 600d Instruction Manual

181
3 Setting the FlashN
With [Built-in flash func. setting ] and [External flash func. setting], 
you can set the functions listed in  the table below. The functions 
displayed under [ External flash func. setting ] will vary depending on 
the Speedlite model.
 Select [Built-in flash func. setting ] 
or [ External flash func. setting ].
X The flash functions will be displayed. 
The functions not dimmed can be 
selected and set.
[Built-in flash func. setting] and [External flash func. 
setting] Settable...

3 Setting the Flash N
182
 Shutter sync.
Normally, set this to [ 1st curtain] so that the flash fires immediately 
after the exposure starts.
If [ 2nd curtain ] is set, the flash will fire right before the exposure 
ends. When this is combined with  a slow sync speed, you can create 
a trail of light such as from car headlights at night. With 2nd-curtain 
sync, a preflash is fired w hen you press the shutter button 
completely. This is to determine the exposure. Then immediately 
before the exposure...

183
3 Setting the FlashN
 Clear flash settings
With the [Built-in flash func. setting ] or [External flash func. 
setting ] screen displayed, press the < C> button to display the 
screen to clear the flash settings.  When you select [OK], the 
settings for the flash will be cleared.
The Custom Functions displayed under [ External flash C.Fn setting] 
will vary depending on the Speedlite model.
1Display the Custom Function.
  With the camera ready to shoot with 
an external Speedlite, select 
[External...

184
Whenever you set the power switch to  or , the Self 
Cleaning Sensor Unit operates to aut omatically shake off the dust on 
the front of the sensor. Normally, you need not pay attention to this 
operation. However, you can execute  the sensor cleaning at anytime as 
well as disable it.
1Select [Sensor cleaning].
 Under the [ 6] tab, select [Sensor 
cleaning ], then press < 0>.
2Select [Clean nowf].
  Select [Clean now f], then press 
< 0 >.
  Select [OK ] on the dialog screen, 
then press < 0>.
X The...

185
Normally, the Self Cleaning Sensor Unit will eliminate most of the dust 
that might be visible on captured im ages. However, in case visible dust 
still remains, you can append the Du st Delete Data to the image for 
erasing the dust spots later. The Dust  Delete Data is used by Digital 
Photo Professional (provided softwa re, p.302) to erase the dust spots 
automatically.
 Get a solid-white object (paper, etc.).
  Set the lens focal length to 50mm or longer.
  Set the lens focus mode switch to < MF>...

3 Appending Dust Delete Data N
186
3Photograph 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.
X The 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 obta ined even if there 
is no card in the camera.
X
When the picture is taken, the camera 
will start collecting the Dust Delete 
Data. When the Dust Delete...

187
Dust which could not be removed by the automatic sensor cleaning can 
be removed manually with a blower, etc.
The surface of the image sensor is extremely delicate. If the 
sensor needs to be cleaned directly, having it done by a Canon 
Service Center is recommended.
Before cleaning the sensor, det ach the lens from the camera.
1Select [Sensor cleaning].
 Under the [ 6] tab, select [Sensor 
cleaning ], then press < 0>.
2Select [Clean manually].
  Select [Clean manually], then press 
.
3Select [OK]....

3 Manual Sensor Cleaning N
188
 While cleaning the sensor, never  do any of the following. If the 
power is cut off, the shutter will  close and the shutter curtains and 
image sensor might get damaged.
• Setting the power switch to < 2>.
• Opening the battery compartment cover.
• Opening the card slot cover.
  The surface of the image  sensor is extremely delicate. Clean the sensor 
with care.
  Use a plain blower without any brus h attached. A brush can scratch the 
sensor.
  Do not insert the blower...

189
Wireless FlashPhotography
You can use the built-in flash 
for wireless flash shooting.
The camera’s built-in flash  can work as a master unit 
with Canon Speedlit es having a wireless slave feature 
and wirelessly trigger the  Speedlite(s) to fire.
Canceling the slave unit’s auto power off
To cancel the slave unit’s auto power off, press the 
camera’s < A> button. If you are using manual flash 
firing, press the slave unit’s te st firing (PILOT) button to 
cancel the auto power off.
Be sure to also...

190
Regarding your Speedlite (slave unit), refer to its instruction manual and 
set it as follows. The settings other than the below for the slave unit’\
s 
control are all set with the camera. Different types of Canon Speedlite 
slave units can be used and controlled together.
(1) Set the Speedlite as a slave unit.
(2) Set the Speedlite’s transmission channel to the same one as  the camera’s.
*1
(3) If you want to set the flash ratio  (p.196), set the slave unit ID.
(4) Position the camera and slave...