Canon 70d W User Manual

							201
3 Setting the FlashN
 Flash exposure compensation
The same setting as step 3 in “Flash 
Exposure Compensation” on page 190 
can be set.
For details, refer to the Speedlite’s 
instruction manual.
  Flash exposure bracketing
While the flash output is changed 
automatically, three shots are taken.
For details, refer to the instruction 
manual of a Speedlite compatible with 
flash exposure bracketing.
When using second-curtain synchronizat ion, set the shutter speed to 1/25 
sec. or slower. If the sh utter speed is 1/30 sec. or faster, first-curtain 
synchronization will be appl ied automatically even if [Second-curtain 
synchronization ] is set.
 With an EX-series Speedlite not compatible with  flash function settings, 
you can only set  the following: [Flash firing], [E-TTL II meter. ], and 
[ Flash exposure compensation ] under [External flash func. setting ]. 
([ Shutter synchronization ] can also be set with certain EX-series 
Speedlites.)
  If flash exposure compensation is se t with an external Speedlite, you 
cannot set the flash ex posure compensation wi th the camera (Quick 
Control or External flash  function settings). If it is set with both the 
camera and external Speedlite, the Speedlite’s setting overrides the 
camera’s.
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							3 Setting the Flash N
202
For details on the external Speedlit e’s Custom Functions, refer to the 
Speedlite’s instruction manual.
1Select [External flash C.Fn 
setting].
  Select [ External flash C.Fn setting ], 
then press < 0>.
2Set the desired function.
  Press the < U> key to select the 
number, then press < 0>.
  Select the setting, then press < 0>.
1Select [Clear settings].
  Select [Clear settings ], then press 
< 0 >.
2Select the settings to be cleared.
  Select [Clear built-in flash set.], 
[Clear external flash set. ], or [Clear 
ext. flash C.Fn set. ], then press 
< 0 >.
  When you select [OK ], the respective 
flash settings or all the Custom 
Function settings will be cleared.
External Speedlite Custom Function Settings
Clear Settings
With an EX-series Sp eedlite, if the [Flash metering mode ] Custom 
Function is set to [ TTL] (autoflash), the Speedlite  will always fire at full 
output.
The Speedlite’s Personal Functions (P.F n) cannot be set or canceled with 
the camera’s [ Flash control ] screen. Set it with the Speedlite.
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							203
The camera’s built-in flash can work as a master unit with Canon 
Speedlites with a wireless slave feature via optical transmission and 
wirelessly trigger the Speedlite(s) to fire.
Be sure to read about wireless flash photography (optical transmission) 
in the Speedlite’s instruction manual.
Regarding your Speedlite (slave unit),  refer to its instruction manual and 
set it as follows. The settings other  than the ones 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 external Speedlite as a slave unit.
(2) Set the external Speedlite’s tr ansmission channel to the same 
channel as set on the camera. *
1
(3) If you want to set the flash ratio  (p.210), set the slave unit ID.
(4) Position the camera and slave unit(s) within the range shown 
below.
(5) Face the slave unit’s wirel ess sensor toward the camera.*
2
Using Wireless FlashN
Slave Unit Settings and Position
Approx.
10 m
(32.8 ft.)
Approx. 7 m
(23.0 ft.)
Approx. 5 m(16.4 ft.) Approx. 7 m
(23.0 ft.)
Approx.
80°
Example of Wireless Flash Set-up
Indoors
Outdoors
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							Using Wireless FlashN
204
*1: If the Speedlite does not have a trans mission channel setting function, the 
camera can work with any channel.
*2: In small rooms, the slave unit may work  even if its wireless sensor does not face 
the camera. The camera’s wireless si gnals can bounce off the walls and be 
received by the slave unit. When using an EX-series Speedlite with fixed flash 
head and wireless sensor, take pictures to make sure it can 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 test 
firing button to cancel the auto power off.
The camera’s master unit function cannot be used  for wireless flash 
shooting with radio transmission.
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							205
Using Wireless FlashN
The table below shows the possible  configurations for wireless flash 
shooting. Choose the configurati on suiting the subject, shooting 
conditions, and the number of external Speedlites you use.
Wireless Flash Shooting Configurations
External SpeedliteBuilt-in  FlashPageSetting
QuantityA:B Flash 
RatioWireless 
FunctionsFiring Group
Fully 
Automatic 
(E-TTL II 
autoflash) Single
- - p.206 01 All
Single -Used p.208 0:3 -
Multiple - - p.209 01 All
Multiple Set -p.21001(A:B)
Multiple -Used
p.211 0
+31  All and 2
Multiple Set Used 0+31 (A:B)2
• Flash exposure  compensation p.212
• FE lock
External SpeedliteBuilt-in  FlashPageSetting
QuantityA:B Flash  RatioWireless FunctionsFiring Group
Manual  Flash Single/
Multiple --
p.21301
 All
Multiple Set -01(A:B)
Single/
Multiple -
Used 0+31  All and 2
Multiple Set Used 0+31 (A:B)2
Even if you disable the built-in flash from firing, it wi ll still fire to 
control the slave unit.  The flash fired to control the slave unit may 
therefore appear in the picture depending on th e shooting conditions.
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							Using Wireless FlashN
206
This shows the most basic setup for 
fully-automatic wireless flash shooting 
with one external Speedlite.
Steps 1 to 4 and 6 apply to all 
wireless flash shooting. Therefore, 
these steps are omitted in the other 
wireless flash setups explained on 
the pages hereafter.
On the menu screens, the < 0> and 
< 1 > icons refer to the external 
Speedlite, and the < 3> and < 2> 
icons refer to the built-in flash.
1Press the < I> button to raise the 
built-in flash.
  For wireless flash shooting, be sure 
to raise the built-in flash.
2Select [Flash control].
 Under the [ z2] tab, select [Flash 
control ].
3Select [Built-in flash settings].
 Select [Built-in flash settings ].
Fully Automatic Shooting with One External Speedlite
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							207
Using Wireless FlashN
4Set [Flash mode: E-TTL II].
 Set [ Flash mode ] to [E-TTL II ].
5Set [Wireless func.: 0].
 Set [ Wireless func.] to [0 ].
6Set [Channel].
 Set the channel (1-4) to the same one 
as the slave unit.
7Set [Firing group:1 All].
 Set [ Firing group] to [1 All].
8Take the picture.
 Set the camera and take the picture 
in the same way as with normal flash 
shooting.
  To terminate wireless flash shooting, 
set [Wireless func.] to [Disable].
 Setting [ E-TTL II meter. ] to [Evaluative ] is recommended.
  Firing a test flash is not po ssible with the slave unit.
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							Using Wireless FlashN
208
This is fully automatic wireless flash 
shooting with one external Speedlite and 
the built-in flash.
You can change the flash ratio between 
the external Speedlite and built-in flash 
to adjust how the shadows look on the 
subject.
1Set [Wireless func.] to [0 :3].
  In step 5 on page 207, set [ Wireless 
func. ] to [0 :3].
2Set the desired flash ratio and 
take the picture.
 Select [1 :2] and set the flash ratio 
within 8:1 to 1:1. Setting a flash ratio 
to the right of 1:1 is not possible.
Fully Automatic Shooting with One External Speedlite 
and the Built-in Flash
  If the built-in flash outp ut is not enough, set a  higher ISO speed (p.120).
  The 8:1 to 1:1 flash rati o is equivalent to 3:1 to 1:1 stops (1/2-stop 
increments).
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							209
Using Wireless FlashN
Multiple Speedlite slave units can be treated as one flash unit or 
separated into slave groups whose flash ratio can be set.
The basic settings are shown below. By changing the [ Firing group] 
setting, you can shoot with various wir eless flash setups with multiple 
Speedlites.
Basic settings:
Flash mode : E-TTL II
Wireless func. : 0
Channel :  (Same as slave units)
 [1All] Using multiple slave Speedlites as one flash unitThis is convenient when you need a 
large flash output. All the slave units will 
fire at the same output and be controlled 
to obtain a standard exposure.
No matter what the slave ID is (A, B, or 
C), all the slave units will fire as one 
group.
1Set [Firing group:1 All].
2Take the picture.
Fully Automatic Shooting with Multiple External Speedlites
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							Using Wireless FlashN
210
 [1 (A:B)] Multiple slave  units in multiple groupsDivide the slave units into Groups A and 
B and change the flash ratio to obtain 
the desired lighting effect.
Refer to your Speedlite’s instruction 
manual to set one slave unit’s slave ID 
to A (Group A) and the other slave unit’s 
ID to B (Group B) and position them as 
shown in the illustration.
1Set [Firing group] to [1  (A:B)].
2Set the desired flash ratio and 
take the picture.
 Select [A:B fire ratio ] and set the 
flash ratio.
A  B 
If [Firing group] is set to [1 (A:B) ], Speedlites with slave ID:C (Group C) 
will not fire.
The 8:1 to 1:1 to 1:8 flash ratio is equi valent to 3:1 to 1:1 to 1:3 stops (1/2-
stop increments).
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