Canon Speedlite 600EX-RT Quick Manual
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QuickGuide to Speedlite 600EX-RT
Radio Wireless Flash Setup
INTRODUCTION
The Speedlite 600EX-RT allows you to set up multiple Speedlites
as “slaves” which are wirelessly controlled and synchronized by a
“master” unit. As compared to ash units that use optical signals
only, the 600EX-RT’s radio-based wireless E-TTL offers signi-
cant advantages, such as the freedom to place 600EX-RT slave
units up to 98 feet from the camera and “master unit”, all without a
direct line-of-sight between the master and slaves. Your wireless
radio setup options include:
• Automatic E-TTL with equal output from all units
• Automatic Ratio E-TTL with unequal (ratio) output
between ring groups
• M – Manually-set power output (you can set a different
ash output for each slave unit or ring group)
• GR – Different groups have different ash modes, with
up to ve groups
Only a 600EX-RT or ST-E3-RT Speedlite Transmitter attached to
a camera can be a master. You can, however, use two or more
master units by setting up multiple cameras, each with a master
unit attached, and switch from one to another during a wireless
ash shooting session. The slave lighting setup will remain the
same. Only 600EX-RTs can be slaves when you are shooting in
radio control mode.
COMPATIBILITY
EOS cameras released since 2012 (such as EOS-1D X, EOS 5D
Mark III, EOS 6D, and EOS Rebel T4i) – full compatibility
EOS cameras released before 2012:
• Flash sync speed must be one stop slower than the
maximum
• No high-speed sync shooting
• No group (GR mode) ash
Note: Full ash sync, including Hi-Speed Sync, is available with
the 600EX-RT with all EOS SLRs when used in optical wireless
E-TTL control mode.
INITIAL WIRELESS RADIO FLASH SETUP
You must rst set the master and slaves to matching transmission
channels and wireless radio IDs. Once you have done so, any
settings you make to the master will automatically be transmit-
ted to the slaves. This eliminates the need to adjust the slaves
individually and manually.
1. To set the master unit: Press the Wireless Flash Button until
the RT icon (upper-right corner of the unit’s LCD screen) and
<MASTER> appear.
The wireless ash cycle via button is: Conventional on-camera
ash > Radio-based Master unit > Radio-based Slave unit >
Optical-based Master unit > Optical based Slave unit.
2. To set the slave unit(s): Press the Wireless Flash Button until
the RT icon and <SLAVE> appear.
3. To set the transmission channel: Set the master and slave
units to the same Transmission Channel, otherwise the
slave(s) will not re. Use the same procedure below for
master and slave.
a. Press Fn Button 4 until <MENU 3> displays.
b. Press the channel button (Fn Button 1, under the “CH”
icon). The channel number will highlight immediately
below RT icon. Turn the selector dial to the channel
number of your choice (1 to 15) or AUTO. If you set
AUTO, the 600EX-RT will automatically set the channel
with the best reception. Set the master and slave units
to the same Wireless Radio Channel.
c. Press Fn Button 4 until <MENU 3> displays.
d. Press Fn Button 2 to highlight ID.
e. Turn the Select Dial to the digit you want to set. There
are four digits.
f. Press the Select/Set Button to activate the digit setting.
g. Turn the Select Dial to set any digit from 0 to 9, then
press the Select/Set Button to register your setting.
h. Repeat steps e – g to enter a four-digit number. You
can enter any number from 0000 – 9999. The master
and slave units must be set to same ID number. The
number you set must be different from that of any other
600EX-RT shooter in the vicinity.
i. Press Fn Button 4 to return the ash to shoot-ready
mode.
j. The <LINK> lamp should light green to indicate a
working link between the master and slave, assuming
both are turned on and set to same Channel/ID.
• If you are using more than one master, the color of the
<LINK> lamp will vary depending on the order in which
you turn the masters on. The rst/main master is green.
Subsequent/sub-masters are orange.
• If the LINK lamp is continuously red, check to make
sure the master and slave are set to the same channel
and ID.
• If the LINK lamp is blinking red, either your setup totals
more than 16 units or you may need to turn the power
off and on again.
MASTER FLASH FIRING ON/OFF
You can choose whether master ash ring is ON and therefore
the master contributes to the ash exposure, or OFF and does
not. The master ash will still control the slaves, regardless of
whether it contributes to the exposure.
1. Press Fn Button 4 until Menu 2 displays.
2. Press Fn Button 1 (under Flash On/Off icon) to ON or OFF
a. Three little beam lines coming from ash icon on LCD
panel indicate Master Flash ON
b. Beam icons disappear when Master Flash OFF
is active
WIRELESS E-TTL — “ALL” (FLASH RATIO OFF)
In this mode all ash units will re at the same output, with full
E-TTL auto ash exposure, which you can adjust with ash
exposure compensation (FEC) on your camera, as necessary.
This mode is best for lighting setups where you want even lighting
throughout the scene. E-TTL is also great when ash-to-subject
distances may change from shot to shot.
1. Perform the initial ash setup described above. Conrm that
master and slave are set to the same transmission channel
and radio ID. Position the camera and ash within correct
operating range (30 meters/98 feet.)
2. Set the ring group on each slave unit. Set the slave unit to
ring group A, B, or C. The slave will not re if set to group D
or E, when ratio control is set to ALL. You can assign multiple
ash units to the same group.
3. Set the master to radio-based Wireless E-TTL. Press the
<MODE> button on the master unit to set the master to
E-TTL.
4. Set the Ratio to “ALL” — On master unit, press Fn Button 4
(under “Menu 1” icon) until Menu 2 appears. Press Fn
Button 2 (under “Ratio” icon) until “ALL”
appears on master unit’s LCD panel.
5. Conrm wireless link. Conrm that the <LINK> lights on the
600EX-RT’s are lit and green and that the AF-assist beam
emitter on the slave is blinking at 1-second intervals. Also
conrm that the red ash ready light is lit on the master unit.
6. Shoot.
a. Press the test ash button on the master ash to check
operation. If a slave does not re, make sure it is within
the correct range.
b. Take the picture. The ash exposure conrmation
lamp will light for 3 secs to conrm normal exposure.
1 2 3
Fn Button 1
Wireless
Button
Flash Ready/Test FlashFlash Mode Button
Fn Button 2 Fn Button 3 Fn Button 4
Select Dial