Canon ST-E3-RT-V2 Manual
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Canon ST-E3-RT-V2 Manual

Speedlite transmitter
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(Ver.2)
E
Advanced User Guide
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Summary of Contents for Canon ST-E3-RT-V2

  • Page 1 (Ver.2) Advanced User Guide...

  • Page 2: Introduction

    Introduction The Canon Speedlite Transmitter ST-E3-RT (Ver.2) is a transmitter for wireless flash shooting. It can control up to 5 groups (15 units) of Canon Speedlites that have a wireless multiple flash shooting function using radio transmission. The transmitter also has dust and water resistance equivalent to EOS-1D series cameras.

  • Page 3: Chapters

    Chapters Introduction Getting Started Preparations for wireless flash shooting Wireless Flash Shooting: Radio Transmission Wireless flash shooting with radio transmission Setting Transmitter Functions with Camera Operations Setting the transmitter functions from the camera’s menu screen Customizing the Transmitter Customizing with Custom Functions and Personal Functions Reference System map, FAQ...

  • Page 4: Table Of Contents

    Contents Introduction Chapters ....................3 Nomenclature....................6 Conventions Used in this Manual ............10 Getting Started Installing the Batteries................12 Attaching and Detaching the Transmitter..........13 Turning on the Power................13 Wireless Flash Shooting: Radio Transmission ' Wireless Flash Shooting ..............16 Wireless Settings ..................20 a: Fully Automatic Wireless Flash Shooting........24 Using Fully Automatic Wireless Flash.............27 a: Wireless Multiple Flash Shooting with Flash Ratio ....32 q: Wireless Multiple Flash Shooting with Manual Flash Output ....35...
  • Page 5 Contents Customizing the Transmitter C / >: Setting Custom and Personal Functions ......56 C: Setting Custom Functions ............58 >: Setting Personal Functions ............60 Reference ST-E3-RT (Ver.2) System ..............62 Troubleshooting Guide................63 Specifications ..................66 Index ...................... 70...

  • Page 6: Nomenclature

    Nomenclature <D> Radio transmission LCD panel confirmation lamp (p.21, 23, 25, 31, 47) Function button 2 Function button 3 Function button 1 <I> Function button 4 Linked shooting button (p.45) <E> Flash mode button Battery compartment (p.24, 35, 37, 40) cover (p.12) Power switch (p.13) <K>...
  • Page 7 Nomenclature Nomenclature 02 Terminal cover Remote release terminal (p.44) Mounting foot (p.13) Contacts Locking pin Case...
  • Page 8 Nomenclature LCD panel Radio transmission wireless shooting (p.15)  E-TTL II/E-TTL autoflash (p.24) g : FEB (p.28, 52) FEB sequence (p.58) M : Sender (p.20) : Sync speed warning (p.19) c : High-speed sync Flash exposure compensation amount T : Personal Functions (p.60) , : Flash ratio (p.32) Beep a : E-TTL II/E-TTL...
  • Page 9 Nomenclature  Stroboscopic flash (p.37) Multi (Stroboscopic) flash Number of flashes Flash frequency  Group firing (p.40) [ : Group flash Flash mode Firing group  Linked shooting (p.45) Linked shooting x : Receiver M : Sender...

  • Page 10: Conventions Used In This Manual

     Functions of the camera and the Custom Functions and Personal Functions of the transmitter and the Speedlite are at their default settings. All figures are based on the use of two AA/LR6 alkaline batteries and  Canon’s testing standards.

  • Page 11: Getting Started

    Getting Started This chapter describes the preparations before starting wireless flash shooting.

  • Page 12: Installing The Batteries

    You can perform wireless flash shooting for approx. 10 hours* continuously. * Based on new AA/LR6 alkaline batteries and Canon’s testing standards. Using AA/LR6 batteries other than the alkaline type may cause improper battery contact due to the irregular shape of the battery contacts.

  • Page 13: Attaching And Detaching The Transmitter

    Attaching and Detaching the Transmitter Attach the transmitter. Slip the transmitter’s mounting foot  all the way into the camera’s hot shoe. Secure the transmitter. On the mounting foot, slide the lock  lever to the right. When the lock lever clicks in place, it will be locked.
  • Page 14 Turning on the Power About Auto Power Off To save battery power, the power will turn off automatically after 5 min. of idle use. To turn on the transmitter again, press the camera’s shutter button halfway, or press the test flash button (charge lamp). About the Lock Function By setting the power switch to <a>, you can disable flash’s button and dial operations.

  • Page 15: Wireless Flash Shooting: Radio Transmission

    Wireless Flash Shooting: Radio Transmission This chapter describes wireless flash shooting. For the accessories required for wireless shooting, see the system map (p.62). When the camera’s shooting mode is set to a fully automatic mode or an Image Zone mode, the operations in this chapter are not available.

  • Page 16: Wireless Flash Shooting

    ' Wireless Flash Shooting Using a transmitter and a Canon Speedlite compatible with radio transmission wireless shooting makes it easy to shoot with advanced wireless multiple flash lighting, in the same way as normal E-TTL II/ E-TTL autoflash shooting. The system is designed so that the settings of the transmitter attached to the camera (sender) are automatically reflected on the Speedlite that is wirelessly controlled (receiver).
  • Page 17 ' Wireless Flash Shooting Wireless Multiple Flash Shooting You can divide the receiver units into two or three groups and perform E-TTL II/E-TTL autoflash shooting while changing the flash ratio (factor). In addition, you can set and shoot with a different flash mode for each firing group, for up to 5 groups.
  • Page 18 ' Wireless Flash Shooting  Shooting with a Different Flash Mode set for Each Group (p.40) Auto external flash metering Ceiling E-TTL II Manual flash Manual flash Manual flash * The flash mode settings are indicated only as an example.
  • Page 19 ' Wireless Flash Shooting About Restrictions on Functions Depending on the Camera Used When performing radio transmission wireless flash shooting, restrictions may apply to the flash mode, maximum flash sync speed (referred to below as the “flash sync speed”) and high-speed sync function, depending on the camera that you use.

  • Page 20: Wireless Settings

    Wireless Settings To perform wireless shooting, set the transmitter (sender unit) and flash (receiver unit) with the following procedure. Sender Unit Setting Check that <M> is displayed. Check that <M> is displayed at  the position shown in the figure. Receiver Unit Setting Set a flash that is compatible with radio transmission wireless flash shooting as the receiver unit.
  • Page 21 Wireless Settings  Setting the Sender Unit Transmission Channel / Wireless Radio ID Use the following procedure to set the sender unit’s transmission channel and wireless radio ID. Set the same channel and ID for both the sender unit and receiver unit. For the receiver unit settings, see the flash’s instruction manual.
  • Page 22 Wireless Settings  Scanning the Sender Unit Transmission Channels to Set You can scan the radio reception status and set the sender unit’s transmission channel automatically or manually. When the channel is set to “AUTO”, the channel with the best reception signal is automatically set.
  • Page 23 Wireless Settings About the <D> Lamp The color of the <D> lamp changes depending on the transmission status of the sender unit and the receiver unit. Color Status Description Action Transmission Green – Not connected Check the channel and ID Sender units + receiver units = Too many units 16 units or less...

  • Page 24: A: Fully Automatic Wireless Flash Shooting

    a: Fully Automatic Wireless Flash Shooting This section describes basic fully automatic wireless shooting when using a transmitter attached to the camera (sender) and a wirelessly controlled flash (receiver). Autoflash Shooting Using One Receiver Unit Set the flash as the receiver unit. For the receiver unit settings, see the ...
  • Page 25 a: Fully Automatic Wireless Flash Shooting Check the transmission status and that the flash is ready. Check that the <D> lamp is lit in  green. When the receiver flash is ready, the  AF-assist beam emitter blinks at 1-second intervals. Check that the <Q>...
  • Page 26 a: Fully Automatic Wireless Flash Shooting Autoflash Shooting Using Multiple Receiver Units When you need more flash output or you want to perform lighting more easily, you can increase the number of receiver units and fire them as a single flash. To add receiver units, use the same procedure as “Autoflash Shooting Using One Receiver Unit”.

  • Page 27: Using Fully Automatic Wireless Flash

    Using Fully Automatic Wireless Flash Flash exposure compensation and other settings set on the transmitter (sender unit) will also be automatically set in the flash (receiver unit). You do not need to operate the receiver unit. f Flash Exposure Compensation In the same way as normal exposure compensation, you can set exposure compensation for flash.
  • Page 28 Using Fully Automatic Wireless Flash g FEB You can take three shots while automatically changing the flash output. This is called FEB (Flash Exposure Bracketing). The settable range is up to ±3 stops in 1/3-stop increments. Display <M>. Press function button 4 to display ...
  • Page 29 Using Fully Automatic Wireless Flash c High-speed Sync With the high-speed sync function, the flash can synchronize with all shutter speeds. This is convenient when you want to use aperture- priority AE for fill-flash portraits of a subject. Display <P>. Press function button 4 to display ...
  • Page 30 <P>. Set the sync setting to <r>. Press function button <Y> to set  <r>. Check the cameras that support second-curtain sync on the Canon  website. The second-curtain sync works well when the camera's shooting mode is  set to <...
  • Page 31 Using Fully Automatic Wireless Flash 7: FE Lock FE (Flash Exposure) lock locks the correct flash exposure setting for any part of the scene. Perform FE lock by operating the camera. For the operations, see the camera and flash’s instruction manual. If a correct exposure cannot be obtained when FE lock is performed, <Q>...

  • Page 32: A: Wireless Multiple Flash Shooting With Flash Ratio

    a: Wireless Multiple Flash Shooting with Flash Ratio Autoflash Shooting with Two Receiver Groups You can divide the receiver units into two firing groups, A and B, and adjust the lighting balance (flash ratio) for shooting. The exposure is controlled automatically so that the total flash output of firing groups A and B results in the standard exposure.
  • Page 33 a: Wireless Multiple Flash Shooting with Flash Ratio Set the flash ratio. Press function button 3 <F>.  Press function button 3 <A>.  Turn <9> to set the flash ratio, and  press the <8> button. Press function button 4 <?> to ...
  • Page 34 a: Wireless Multiple Flash Shooting with Flash Ratio Set flash exposure compensation as required. Press function button 3 <F>,  turn <9> and select <6>. Press function button 3 <B>.  Turn <9> to set the flash exposure  compensation amount, and press the <8>...

  • Page 35: Q: Wireless Multiple Flash Shooting With Manual Flash Output

    q: Wireless Multiple Flash Shooting with Manual Flash Output This describes wireless (multiple flash) shooting using manual flash. You can shoot with a different flash output setting for each receiver unit (firing group). Set all parameters on the sender unit. Set the flash mode to <q>.
  • Page 36 q: Wireless Multiple Flash Shooting with Manual Flash Output How to Set the Firing Output of the Manual Flash with the FE Memory Function You can set the firing output adjusted in firing mode <a> as the firing output of the firing mode <q>. Set the FE memory function.
  • Page 37 q: Wireless Multiple Flash Shooting with Manual Flash Output ?: Stroboscopic Flash Stroboscopic flash is an advanced manual flash shooting method. When using stroboscopic flash with a slow shutter speed, you can shoot multiple successive movements within a single picture, similar to stop- motion pictures.
  • Page 38 q: Wireless Multiple Flash Shooting with Manual Flash Output  Calculating the Shutter Speed In stroboscopic flash, to ensure that the shutter stays open until the end of the continuous flashes, set the camera with a shutter speed calculated with the following equation. Number of flashes ÷...
  • Page 39 q: Wireless Multiple Flash Shooting with Manual Flash Output Maximum Number of Continuous Flashes 6 - 7 8 - 9 Flash Output 1/16 1/32 1/64 1/128 1/256 1/512 1/1024 1/2048 1/4096 1/8192 12 - 14 15 - 19 20 - 50 60 - 199 250 - 500 Flash Output 1/16 1/32...
  • Page 40 [: Shooting with a Different Flash Mode for Each Group When using an EOS digital camera Ceiling released since 2012, such as the EOS- 1D X (except EOS REBEL T100/4000D/ 3000D, EOS REBEL T7/1500D/2000D, EOS REBEL T6/1300D and EOS REBEL T5/1200D), you can shoot with a different flash mode set for each firing group, with up to 5 groups (A/B/C/D/E).
  • Page 41 [: Shooting with a Different Flash Mode for Each Group Set the flash mode. Set the flash mode of each firing  group by operating the sender unit. While <M> is displayed, press  function button 3 <F> and turn <9>...

  • Page 42: Clearing Transmitter Settings

    Clearing Transmitter Settings/Test Flash from a Receiver Unit Take the picture. Each receiver unit fires in the flash mode that was set for each group. When the flash mode of the firing group is set to <a> or </>, exposure is controlled to obtain a standard exposure for the main subject as a single group.

  • Page 43: Modeling Flash

    Modeling Flash When the camera’s depth-of-field preview button is pressed, the flash fires continuously for 1 sec. This is called the modeling flash. It enables you to see the shadow effects of the flash on the subject and the lighting balance.

  • Page 44: Remote Release From A Receiver Unit

    Remote Release from a Receiver Unit You can perform remote release (remote control shooting) from a flash set as a receiver unit. For the operations, see the flash’s instruction manual. When shooting with this function, the “Release Cable SR-N3” (sold separately) may be needed, depending on your camera.

  • Page 45: Linked Shooting

    Linked Shooting Linked shooting is a function that automatically releases the shutter of a receiver unit camera by linking it to a sender unit camera. You can shoot with linked shooting for up to 16 units, including both sender units and receiver units.
  • Page 46 Linked Shooting Set to linked shooting mode. Press the <I> button continuously  until <b> is displayed on the LCD panel. Linked shooting mode’s “Receiver unit” is set. Press the <I> button again to set  “Sender unit” of the linked shooting mode.
  • Page 47 Linked Shooting Set up the receiver unit cameras. Check that the <D> lamp of the  receiver unit is lit in green. Set up all the receiver unit cameras  within approximately 30 m/98.4 ft. of the sender unit camera. Take the picture.
  • Page 48 Linked Shooting Shooting with manual focus is recommended for the receiver unit  cameras. If focus cannot be achieved with autofocus, linked shooting is not possible with the corresponding receiver unit camera. There is a short time lag between the release of the receiver unit camera ...

  • Page 49: Setting Transmitter Functions With Camera Operations

    Setting Transmitter Functions with Camera Operations This chapter describes how to set the transmitter functions from the camera’s menu screen. When the camera’s shooting mode is set to a fully automatic mode or an Image Zone mode, the operations in this chapter are not available.

  • Page 50: Transmitter Control From Camera's Menu Screen

    Transmitter Control from Camera’s Menu Screen When using EOS digital cameras released since 2007, you can set flash functions, transmitter functions or Custom Functions from the camera’s menu screen. For the camera operations, see the camera’s instruction manual. Transmitter Function Setting Select [External Speedlite control].
  • Page 51 Transmitter Control from Camera’s Menu Screen Settings Available in [Flash function settings]  EOS digital cameras released since 2012 When using the transmitter with cameras such as EOS-1D X, you can set the functions for “Radio transmission wireless shooting” in the [Flash function settings] screen.
  • Page 52 Transmitter Control from Camera’s Menu Screen Flash firing  To perform wireless flash shooting, set to [Enable]. When [Disable] is set, wireless flash shooting is not available. E-TTL II flash metering  For normal exposures, set it to [Evaluative]. If [Average] is set, the flash exposure will be averaged for the entire scene metered by the camera.
  • Page 53 Transmitter Control from Camera’s Menu Screen Wireless flash functions (setting)  Radio transmission wireless flash shooting is set automatically. For details, see Chapter 2. Clear Speedlite (function) settings  You can return the transmitter settings to their default settings. When [Flash mode] is set to [Individual group control], you can select ...
  • Page 54 Transmitter Control from Camera’s Menu Screen Transmitter Custom Function Settings The displayed contents vary depending on the camera. If C.Fn-20 and 22 are not displayed, set them by operating the transmitter. For the Custom Functions, see pages 58 to 59. Select [Flash C.Fn settings].

  • Page 55: Customizing The Transmitter

    Customizing the Transmitter This chapter describes how to customize the transmitter with the Custom Functions (C.Fn) and Personal Functions (P.Fn). When the camera’s shooting mode is set to a fully automatic mode or an Image Zone mode, the operations in this chapter are not available.

  • Page 56: C / >: Setting Custom And Personal Functions

    C / >: Setting Custom and Personal Functions You can customize the transmitter features to suit your shooting preferences with Custom Functions and Personal Functions. Note that the Personal Functions are customizable functions unique to the transmitter. C: Custom Functions Display the Custom Functions screen.
  • Page 57 C / >: Setting Custom and Personal Functions Custom/Personal Function List Number Function Page Custom Functions C.Fn-01 Auto power off C.Fn-02 Modeling flash p.58 C.Fn-03 ( FEB auto cancel C.Fn-04 FEB sequence C.Fn-07 Test firing with autoflash C.Fn-13 Flash exposure metering setting p.59 C.Fn-20 Beep...

  • Page 58: C: Setting Custom Functions

    C: Setting Custom Functions C.Fn-01: (Auto power off) When the transmitter is not operated for 5 min., the power turns off automatically to save energy. You can disable this function. 0: ON (Enabled) 1: OFF (Disabled) C.Fn-02: (Modeling flash) 0: % (Enabled (Depth-of-field preview button)) Press the camera’s depth-of-field preview button to fire the modeling flash.
  • Page 59 C: Setting Custom Functions C.Fn-07: (Test firing with autoflash) You can change the flash output when firing the test flash in E-TTL II/E-TTL autoflash mode. 0: 1/32 (1/32) 1: 1/1 (Full output) C.Fn-13: (Flash exposure metering setting) 0: 4 (Speedlite button and dial) 1: 5 (Speedlite dial only) You can perform flash exposure compensation by directly turning <9>, without pressing the <@>...

  • Page 60: Setting Personal Functions

    >: Setting Personal Functions P.Fn-01: (LCD panel display contrast) You can adjust the contrast of the LCD panel in 5 levels. P.Fn-03: (LCD panel illumination color: Sender) Radio transmission wireless flash shooting, linked shooting: You can select the color of the LCD panel illumination when the transmitter is set as the sender unit.

  • Page 61: Reference

    Reference This chapter contains a system map and frequently asked questions.

  • Page 62: St-E3-Rt (Ver.2) System

    ST-E3-RT (Ver.2) System Wireless Flash Shooting " Sender unit & Transmitter with sender function " Receiver unit Speedlite with receiver function " Speedlite Transmitter ST-E3-RT (Ver.2) # Speedlite EL-1, 600EXII-RT, 600EX-RT, 430EX III-RT Speedlite with a receiver function compatible with radio transmission wireless shooting.

  • Page 63: Troubleshooting Guide

    If a problem occurs with the transmitter, first refer to this Troubleshooting Guide. If this Troubleshooting Guide does not resolve the problem, contact your dealer or nearest Canon Service Center. Power does not turn on. Make sure that the batteries are installed in the correct orientation ...
  • Page 64 Troubleshooting Guide The receiver flash does not fire or unexpectedly fires at full output. Run the channel scan and set the channel with the best radio reception  signal (p.22). Position the receiver unit in clear view of the sender unit, without ...
  • Page 65 Troubleshooting Guide <k> is displayed. Set the shutter speed 1 stop slower than the flash sync speed (p.19).  Cannot release from a receiver unit. When an EOS camera which was released up to 2011, has an N3 type  remote control terminal and is compatible with E-TTL II/E-TTL autoflash is used to perform remote release from a receiver unit or when it has been set as the receiver unit during linked shooting, the “Release Cable...

  • Page 66: Specifications

    Specifications  Type On-camera Speedlite transmitter Type: EOS series supporting E-TTL II / E-TTL autoflash Compatible cameras:  Radio Transmission Wireless Function Exposure control system: E-TTL II/E-TTL autoflash, manual flash, stroboscopic flash, auto external flash metering* * Only when the flash mode is set to <[> Frequency: 2405 - 2475 MHz Modulation system:...
  • Page 67 Approx. 110 g / 3.9 oz. (transmitter only, excluding batteries) Working temperature 0 - 45°C / 32 - 113°F range: 85 % or less Working humidity: All specifications above are based on Canon’s testing standards.  Product specifications and external appearance are subject to change without  notice.
  • Page 68 Safety Instructions Be sure to read these instructions in order to operate the product safely. Follow these instructions to prevent injury or harm to the operator of the product or others. Warnings: Denotes the risk of serious injury or death. Use only power sources specified in this instruction manual for use with the product.
  • Page 69 Follow the cautions below. Otherwise physical injury Cautions: or property damage may result. Do not fire the flash near the eyes.  It may hurt the eyes. Flash emits high temperatures when fired. Keep fingers, any other part of your body, ...

  • Page 70: Index

    Index 4 sec., 6 sec., 16 sec. timer ..10 Two groups (A:B) ...... 32 Flash sync. speed ......52 Flash sync. speed in Av mode ..52 Auto external flash metering ..41 Fully automatic wireless flash Auto power off......14, 58 shooting........
  • Page 71 Index Scan..........22 Second-Curtain Sync ....30 Sender unit setting ....... 20 Setting functions ......49 Shutter speed....... 19 Shutter sync......... 52 Stroboscopic flash......37 Test flash ......13, 25, 42 Transmission channel ..20, 21, 22 Wireless flash shooting ....16 Fully automatic one receiver unit ..........
  • Page 72 CT2-D171-A © CANON INC. 2021...

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