Canon 80d Manual

241
3 Setting the FlashN
Wireless functions / Flash ratio control
Wireless (multiple) flash shooting is 
possible with radio or optical 
transmission.
For details on wireless flash, refer to the 
instruction manual of a Speedlite 
compatible with wireless flash shooting.
With a macro flash (MR-14EX II, etc.) 
compatible with flash function settings, 
you can set the flash ratio between flash 
tubes or flash heads A and B, or perform 
wireless flash with additional slave units.
For details on flash ratio...

3 Setting the FlashN
242
Flash exposure compensation
The same setting as step 3 in “Flash 
Exposure Compensation” on page 230 
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 synchronization, set the shutter speed to 1/25 
sec. or slower. If the shutter...

243
3 Setting the FlashN
For details on the external Speedlite’s Custom Functions, refer to the 
Speedlite’s instruction manual.
1Select [External flash C.Fn 
setting].
2Set the desired function.
Select the number, then press .
Select the setting, then press .
1Select [Clear settings].
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...

244
The camera’s built-in flash can work as a master unit for Canon EX-
series, external Speedlites having a wireless slave feature. It can 
wirelessly trigger the Speedlite(s) to fire via optical transmission.
Be sure to read the instructions  and cautions 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 ot her than the ones below for the slave...

245
Wireless Flash PhotographyN
*1: If the slave Speedlite does not have a transmission channel setting function,  
the flash can work regardless of the camera’s channel setting.
*2: In small rooms, the slave unit may work even if its wireless sensor does not  face the camera. The camera’s wireless signals can bounce off the walls and 
be received by the slave unit. When usi ng an EX-series Speedlite with fixed 
light-emitting unit (flash head) and wireless sensor, take pictures while making 
sure it can...

Wireless Flash PhotographyN
246
The tables below show the possible configurations for wireless flash 
shooting. Select the configuration suiting the subject, shooting 
conditions, the number of exter nal Speedlites you use, etc.
Wireless Flash Photography Configurations
External SpeedliteBuilt-in 
FlashPage
Setting
QuantityA:B 
Flash  RatioWireless 
FunctionsFiring 
Group
Fully 
Automatic  (E-TTL II 
autoflash)
Single - - p.247 01 All
Single -Used p.249 0:3 -
Multiple - - p.250 01 All
Multiple Set -...

247
Wireless Flash PhotographyN
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 other 
wireless flash setups explained on 
the pages hereafter.
On the menu screens, the  and 
 icons indicate the external 
Speedlite, and the <
3> and  
icons indicate t he built-in flash.
1Press the  button to raise the 
built-in flash.
For wireless flash shooting, be...

Wireless Flash PhotographyN
248
4Set [Flash mode: E-TTL II].
5Set [Wireless func.] to [0].
6Set [Channel].
Set the transmission channel (1-4) to 
the same one as the slave unit.
7Set [Firing group] to [ 1All].
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 possible with the slave...

249
Wireless Flash PhotographyN
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 cast on the 
subject.
1Set [Wireless func.] to [0:3 ].
In step 5 on page 248, 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...

Wireless Flash PhotographyN
250
Multiple Speedlite slave units can be fired as one flash unit or separated 
into slave groups for shooti ng with flash ratio control.
The basic settings are shown below. By changing the [
Firing group] 
setting, you can shoot with various wi reless flash setups with multiple 
Speedlites.
Basic settings:
Flash mode : E-TTL II
Wireless func. :0
Channel : (Same as slave units)
[1All] Firing multiple slave Speedlites as one flash unit
Effective when you need a large flash...