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...

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.],...

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...

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...

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)...

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...

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...

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...

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....

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...