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 control, refer to 
the macro flash’s instruction manual.
Flash zoom (Flash coverage)
With Speedlites hav ing a zooming flash 
head, you can set the flash coverage. 
Normally, set this to [
AUTO] so that the 
camera will automatically set the flash 
coverage to match the lens focal length.
Shutter synchronization
Normally, set this to [First-curtain 
synchronization
] so that the flash fires 
immediately after the exposure starts.
If [Second-curtain synchronization] is set, the flash will fire right before 
the shutter closes. When this is combined with a slow shutter speed, you 
can create a trail of light such as from car headlights at night with a more 
natural feel. When second-curtain synchronization is set together with [
E-
TTL II
], the flash will be fired twice in  a row: once when you press the 
shutter button completely and once right before the end of the exposure.
If [High-speed synchronization] is set, the flash can be used at all 
shutter speeds. This is useful when  you want to shoot with background 
blur (open aperture) in locations such as outdoors in daylight. 
						

							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 speed is 1/30 sec. or faster, first-curtain 
synchronization will be applied 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 set  with an external Speedlite, you 
cannot set the flash exposure compensation with 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. 
						

							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 Custom 
Function settings will be cleared.
External Speedlite Cu stom Function Settings
Clear Settings
With an EX-series Speedlite, the Speedlite will always fire at full output if the 
[Flash metering mode] in Flash Custom Function is set to [TTL] (autoflash).
The Speedlite’s Personal Function (P.Fn) cannot be set or canceled on the 
camera’s [Flash control ] screen. Set it with the Speedlite. 
						

							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 
unit’s control are all set with the  camera. Different types of Speedlite 
slave units can be used and controlled together.
(1) Set the external Speedlite as a slave unit.
(2) Set the Speedlite’s transmission channel to the same channel  as set on the camera.
*1
(3) For flash ratio control, set the slave unit’s firing group.
(4) Position the camera and slave unit(s) within the range shown below.
(5) Face the slave unit’s wireless sensor toward the camera.
*2
Wireless Flash Photography N
Slave Unit Settings and Position
Example of Wireless Flash Set-up
Indoors
Outdoors Approx. 10 m/32.8 ft.
Approx. 7 m/23.0 ft.
Approx. 80°
Approx. 5 m/
16.4 ft. Approx. 7 m/
23.0 ft. 
						

							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 fire.
Canceling the slave unit’s auto power offTo cancel the slave unit’s auto power off, press the camera’s  
button. If you are using manual flash fi ring, press the slave unit’s test 
firing button to cancel the auto power off.
The camera’s master function cannot  be used for wireless flash photography 
with radio transmission. 
						

							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 - p.25101(A:B)
Multiple -Used
p.2520
+31  All and  2
Multiple Set Used 0+31 (A:B)2
• 
Flash exposure compensationp.253
• FE lock
External SpeedliteBuilt-in 
FlashPage
Setting
QuantityA:B 
Flash  RatioWireless 
FunctionsFiring 
Group
Manual  Flash Single/
Multiple --
p.25401
 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 will still fire in order 
to control the slave unit via optical transmission.  The flash fired to 
control the slave unit may therefore appear in the picture depending on the 
shooting conditions. 
						

							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 sure 
to raise the built-in flash.
2Select [Flash control].
Under the [z1] tab, select [Flash 
control
].
3Select [Built-in flash settings].
Fully Automatic Shooting wi th One External Speedlite 
						

							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 unit. 
						

							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 not possible.
Fully Automatic Shooting with One External Speedlite and Built-in Flash
 If the built-in flash output is not enough, set a higher ISO speed (p.148).
 The 8:1 to 1:1 flash ratio is equivalent to 3:1 to 1:1 stops (1/2-stop 
increments). 
						

							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 
output. All the slave units will fire at the 
same output and be controlled to obtain 
a standard exposure.
No matter which firing group (A, B, or C) 
the slave units belong to, they will all fire 
as one group.
1Set [Firing group] to [ 1All].
2Take the picture.
Fully Automatic Shooting with Multiple External Speedlites