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Canon ST-E3-RT Speedlite Transmitter

B&H # CASTE3RT Mfr # 5743B002
In Stock
Free Expedited Shipping
You Pay: $269.95
Product Highlights
  • Facilitates Wireless Transmission
  • 5 Groups or 15 Individual Speedlites
  • Range Up to 98.4'
  • Makes Complex Lighting Setups Simple
  • Compact Design & Reliable Construction
  • Clearly Laid Out Information Panel
  • Buttons With Back Lighting

The Canon ST-E3-RT Speedlite Transmitter can help you take full advantage of all the latest features on Canon's top-of-the-line 600EX-RT flash. The ST-E3-RT makes complex lighting setups simple by facilitating radio-controlled, two-way wireless transmission up to 98.4' away, among up to five groups or fifteen individual Speedlites. It has controls similar to the new Speedlite 600EX-RT, including multiple flash metering options, and a variety of flash modes. Compact design with highly reliable construction combined with a clearly laid-out information panel and buttons with back lighting make this an indispensible tool for advanced professional flash photography. The ST-E3-RT represents the next generation in wireless flash systems.

Note: Because it does not have an optical transmission function, the Speedlite Transmitter ST-E3-RT is not compatible with earlier Speedlite models such as 580EX II.

Newly-designed wireless system uses 2-way radio wave communication for enhanced communication among master and slave units. Achieves a transmission distance of up to 98.4' (30 m), all at a 360 degree angle.
Up to 5 groups, or 15 individual flashes can be controlled via 1 transmitter.
Supports E-TTL II flash, manual flash, stroboscopic and auto external flash metering.
Dot matrix LCD panel displays all pertinent information simultaneously and backlit control panel means easy operation.
8 types of custom functions, 3 types of personal functions.
Improved hot shoe contacts for more reliable information transmission and operation.
Slave operation confirmation:
Green Light--Lit: Radio Transmissions Okay
Red Light--Lit: Not Connected
Blinking: Transmission Error/ Too many units
Orange Light--Lit: Sub-master transmission
Blinking: Receiving remote release shooting, linked shooting signal
Not compatible with earlier Speedlite models such as 580EX II
Type Radio transmissions wireless Speedlite transmitter
Transmission Range Approx. 98.4 ft. (30m)
Flash Control Ratio control: 1:8 - 1:1 - 8:1, power 1/2-stop increments
Coverage Flash coverage: Transmission Angle: 360° all around
Power Source 2x AA/LRG Alkaline Batteries (Ni-MH and Lithium batteries can also be used)
Battery Life: Approx. 10 hours continuously when using AA/LR6 alkaline batteries (At a room temperature of 73°F/+23°C).
Dimensions 2.65 x 2.42 x 3.05" (67.4 x 61.5 x 77.4 mm)
Weight 3.9 oz (110 g) excluding battery
Canon ST-E3-RT Speedlite Transmitter
  • Soft Case
  • 1-Year Limited Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    CanonST-E3-RT Speedlite Transmitter
     
    4.7

    (based on 191 reviews)

    Ratings Distribution

    • 5 Stars

       

      (151)

    • 4 Stars

       

      (28)

    • 3 Stars

       

      (6)

    • 2 Stars

       

      (2)

    • 1 Stars

       

      (4)

    97%

    of respondents would recommend this to a friend.

    Pros

    • Lightweight (143)
    • Easy to use (141)
    • Reliable (136)
    • Packs small / compresses (89)
    • Strong construction (71)

    Cons

    • Difficult to use (3)

    Best Uses

    • Weddings (104)
    • Family photos (81)
    • Travel (42)
    • Portraits (41)
    • Sports/action (37)
      • Reviewer Profile:
      • Pro photographer (65), Semi-pro photographer (40), Photo enthusiast (24), Professional (23), Semi-professional (11)
      • Was this a gift?:
      • No (168)

    Most Liked Positive Review

     

    The Holy Grail of Flash Transmitters

    Canon's new flash system is a tour de force of flash technology with RF wireless control as the centerpiece. No longer do we have to choose between RF convenience and sophisticated features like high...Read complete review

    Canon's new flash system is a tour de force of flash technology with RF wireless control as the centerpiece. No longer do we have to choose between RF convenience and sophisticated features like high speed sync. We can have it all.

    This unit is a 600EX-RT w/o the flash head. As such it is extremely light weight and obviously much smaller than the full flash. It only controls via RF so don't imagine using it with older, non-RT flashes. I tested mine with my 600EX-RT to a distance of 187 feet w/ flawless results.

    Canon's new control layout, which is exactly the same on both the ST-E3-RT and the 600EX-RT, is greatly improved from previous speedlites in terms of the quality of the LCD display and the logic of the menu system itself. Once you get used to it you will never go back. Well done, Canon.

    What is it missing? Some have complained that the unit lacks the ability to provide focus assist like the much older ST-E2. I wonder if any of the complainers ever used the focus assist on the ST-E2. It wasn't worth much. A flashlight or, better, a pen laser is far more effective in this role. It doesn't do second curtain sync. Wish it did. It doesn't appear to be firmware upgradeable. Wish it was. And I do wish the range was greater—just because I'd like it to have more range than I could ever imagine using. But, really, to call these concerns "minor" is to overstate their importance.

    With five groups to work with, remote control of up to 15 speedlites, and two way communication between the system components, the ST-E3-RT is an outstanding component in what is now the ultimate flash system. I've been waiting years for Canon to upgrade their system. With the new ST-E3-RT and 600EX-RT they have a couple home runs.

    VS

    Most Liked Negative Review

     

    I'm a little disappointed

    For what it's worth, this transmitter does radio control off-camera speedlites... And that's all it does. Which is a bad thing. It no longer has the autofocus assist beam for focusing in...Read complete review

    For what it's worth, this transmitter does radio control off-camera speedlites... And that's all it does. Which is a bad thing. It no longer has the autofocus assist beam for focusing in low light conditions -- and low light conditions are possibly a principal reason you're using this equipment. It no longer has the optical transmitter function -- and some of your speedlites may be legacy devices. The interoperability of this device is lacking with other Canon and non-Canon flashes currently on the market; and these flashes will continue to be on the market for a long time.

    Frankly, it makes a lot more sense to purchase a 600EX-RT and use it as a master transmitter with the flash set to not discharge on exposure (yes, you can use the 600EX-RT as a low-light autofocus assist or transmitter without flashing.) The 600EX-RT gives you the same master transmitter controls as the ST-E3-RT, but in addition you get the autofocus assist beam, a backwards compatible optical transmitter capability, and a flash bulb. For just a little bit more in price.

    And what about the Pocketwizards? This has virtually the exact same functionality as a Pocketwizard, but the Pocketwizard transmitter only costs two hundred dollars. Really. This is a no-brainer. Skip the ST-E3-RT and wait for Canon to release the Mark II update that also includes the autofocus assist beam and the legacy optical transmitter functionality.

    Reviewed by 191 customers

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    4.0

    Sweet, but pricey!

    By Digitalrules

    from Seattle

    Comments about Canon ST-E3-RT Speedlite Transmitter:

    I'm glad Canon has made a radio trigger for their flagship flash. It also can fire the older 580ex, 580exII AND 430ex strobes via infrared TTL.

    Share this review

     
    5.0

    Best transmitter I've used

    By Clint Jones

    from Tyler Texas

    Comments about Canon ST-E3-RT Speedlite Transmitter:

    This transmitter is awesome when used with the 600ex-rt's. I love not having to run back to my speed lights to adjust them.

    Share this review

     
    5.0

    Maestro for off-camera flash

    By Dr. Bob

    from Chesapeake, VA

    About Me Semi-pro Photographer

    Verified Buyer

    Pros

    • Lightweight
    • Reliable

    Cons

      Best Uses

      • Family Photos
      • Weddings/Events

      Comments about Canon ST-E3-RT Speedlite Transmitter:

      Fantastic coordinator for off-camera speedlite use.

      • Was this a gift?:
      • No

      Share this review

       
      5.0

      ST-E3-RT Speedlite Transmitter by Canon

      By Lezley

      from Seattle

      About Me Photo Enthusiast

      Verified Buyer

      Pros

      • Easy To Pack
      • Reliable

      Cons

        Best Uses

          Comments about Canon ST-E3-RT Speedlite Transmitter:

          Great with Canon 600 Speedlight. Gave up on another system.

          • Was this a gift?:
          • No

          Share this review

          (1 of 1 customers found this review helpful)

           
          5.0

          Unbelieable control and vesatility!

          By Rob

          from Raleigh, NC

          About Me Pro Photographer

          Verified Buyer

          Pros

          • Easy To Pack
          • Easy to Use
          • Lightweight
          • Reliable
          • Strong Construction

          Cons

          • None yet
          • Non Yet

          Best Uses

          • Family Photos
          • Location shoots
          • Travel
          • Weddings/Events

          Comments about Canon ST-E3-RT Speedlite Transmitter:

          I control my 3 600 EX-RT falshes with this unit. I use them for weddings and portrait sessions on location. I work 100% on location. I procrastinated about buying this unit for a couple months. I finnaly went ahead and purchased it. I am so glad I did.I can control each speedlite individually in its own group and give each one a differnet shooting mode and make all adjustments from the top of camera on the unit.No complaints so far. Everythings works as adverstised.

          • Was this a gift?:
          • No

          Share this review

           
          4.0

          easy, fast setup; normal batteries

          By rusty

          from napervillle, il

          About Me Photo Enthusiast

          Verified Buyer

          Pros

          • Easy to Use
          • Reliable

          Cons

            Best Uses

            • Family Photos
            • Sports/Action
            • Weddings/Events

            Comments about Canon ST-E3-RT Speedlite Transmitter:

            uses AA batteries (same as 600ex flash)
            vs. ST-E2 hard-to-find battery
            fast, obvious setup;
            goes beyond line-of-site

            Share this review

            (1 of 2 customers found this review helpful)

             
            1.0

            No autofocus assist beam

            By TVSTAFF

            from New York, NY

            About Me Pro Photographer

            Verified Reviewer

            Pros

              Cons

              • No Autofocus Assist Beam
              • Over priced

              Best Uses

                Comments about Canon ST-E3-RT Speedlite Transmitter:

                What a waste. No autofocus assist beam. Only way to get this work the way it should is to buy another 600 EX RT. Canon really blew it with this overpriced and NO feature glorified $ Radio trigger.

                Share this review

                (1 of 1 customers found this review helpful)

                 
                5.0

                Easy to use

                By Al

                from Waukesha, WI

                About Me Semi-pro Photographer

                Verified Buyer

                Pros

                • Easy to Use
                • Lightweight
                • Strong Construction

                Cons

                  Best Uses

                  • Family Photos
                  • Weddings/Events

                  Comments about Canon ST-E3-RT Speedlite Transmitter:

                  Took it out of the box, set it up in about 5 minutes and I was ready to go. I used my Canon flash as a slave, attached it to a softbox and the pictures turn out great!

                  • Was this a gift?:
                  • No

                  Share this review

                   
                  5.0

                  Easy to Use

                  By Mark

                  from San Antonio ,Tx.

                  About Me Semi-pro Photographer

                  Verified Buyer

                  Pros

                  • Easy To Pack
                  • Easy to Use
                  • Lightweight
                  • Reliable

                  Cons

                    Best Uses

                    • Family Photos

                    Comments about Canon ST-E3-RT Speedlite Transmitter:

                    great for small studio work , super easy use .

                    • Was this a gift?:
                    • No

                    Share this review

                     
                    5.0

                    ST-E3-RT Speedlite Transmitter by Canon

                    By Frank

                    from Northeast PA

                    About Me Pro Photographer

                    Verified Buyer

                    Pros

                    • Easy To Pack
                    • Lightweight
                    • Reliable
                    • Strong Construction

                    Cons

                    • A Bit Of A Learning Curve

                    Best Uses

                    • Family Photos
                    • Portraits
                    • Team Individual
                    • Weddings/Events

                    Comments about Canon ST-E3-RT Speedlite Transmitter:

                    I decided to pick up 3 Canon Speedlite 600EX-RT and a ST-E3-RT Speedlite Transmitter because AB800's and accessories were getting to be a PITA carting into the field.The ST-E3-RT Speedlite Transmitter controls all Speedlites from the camera and they can be set to different settings. The ST-E3-RT Speedlite Transmitter along with the Speedlites are a big enhancement to my process from shooting sports Team and Individual portraits...to Senior portraits to portraits with Santa. Since I don't have a studio...all my shots are in the field or the location of the client and packing, transporting and set up....Huge improvement.There is a bit of a learning curve here to set it to the 600's....one needs to be able to interpret the info in the manuals and set it up.

                    • Was this a gift?:
                    • No

                    Share this review

                    (2 of 2 customers found this review helpful)

                     
                    5.0

                    Great ease, consistent transmitter

                    By Justine_W

                    from Redding, CA

                    About Me Pro Photographer

                    Verified Buyer

                    Pros

                    • Easy To Pack
                    • Easy to Use
                    • Lightweight
                    • Reliable
                    • Strong Construction

                    Cons

                      Best Uses

                      • Family Photos
                      • Landscape/Scenery
                      • Weddings/Events

                      Comments about Canon ST-E3-RT Speedlite Transmitter:

                      Got it with two Canon 600ex flashes. Set up could not have been any easier. Communication to the devices is amazing- through walls and trees! Great, clear menus and ease of use!

                      • Was this a gift?:
                      • No

                      Share this review

                       
                      5.0

                      Great

                      By Matt

                      from Mt SInai NY

                      About Me Semi-pro Photographer

                      Verified Buyer

                      Pros

                      • Easy To Pack
                      • Easy to Use
                      • Lightweight

                      Cons

                        Best Uses

                        • Family Photos
                        • Weddings/Events

                        Comments about Canon ST-E3-RT Speedlite Transmitter:

                        Works great with 600 Flash

                        • Was this a gift?:
                        • No

                        Share this review

                        (1 of 1 customers found this review helpful)

                         
                        5.0

                        Great new way to work with speed lights.

                        By Charles

                        from Virginia Beach, VA

                        About Me Pro Photographer

                        Verified Buyer

                        Pros

                        • Easy To Pack
                        • Easy to Use
                        • Lightweight
                        • Reliable
                        • Strong Construction

                        Cons

                          Best Uses

                          • Family Photos
                          • Weddings/Events

                          Comments about Canon ST-E3-RT Speedlite Transmitter:

                          I really love the ability to have complete control over my 600EX-Rt speed lights from the camera position. I can now place my lights where I want them - without regard to most line of sight issues. From the camera I can adjust the settings of each light (or group of lights) individually. But one of the most important features for me is that now I can rotate my camera vertically and not have an excessive amount of mass that is exacerbating any vibrations from the opening of the mirror. That is a big issue when a speed light is attached to the hotshoe of a camera.

                          • Was this a gift?:
                          • No

                          Share this review

                           
                          5.0

                          EAsy to use, consistent

                          By RitaRose

                          from New York NY

                          About Me Pro Photographer

                          Verified Buyer

                          Pros

                          • Easy To Pack
                          • Easy to Use
                          • Lightweight
                          • Reliable
                          • Strong Construction

                          Cons

                            Best Uses

                            • Weddings/Events

                            Comments about Canon ST-E3-RT Speedlite Transmitter:

                            So far it's been working great with the 600ex-rt's. I have 3 of them and can control them pretty nicely with this small, compact tool.

                            • Was this a gift?:
                            • No

                            Share this review

                             
                            5.0

                            I'm going to buy another one

                            By Mickey

                            from Ft. Myers, FL

                            About Me Pro Photographer

                            Verified Buyer

                            Pros

                            • Easy To Pack
                            • Easy to Use
                            • Lightweight
                            • Reliable

                            Cons

                              Best Uses

                              • Family Photos
                              • Weddings/Events

                              Comments about Canon ST-E3-RT Speedlite Transmitter:

                              Very handy and easy to use. Unfortunately there was no manual in the box but I downloaded the manual from the canon website. Just a great product.

                              • Was this a gift?:
                              • No

                              Share this review

                               
                              5.0

                              I would buy yours product again and again

                              By ildegar izaguirre

                              from adamstown, md

                              About Me Photography Student

                              Verified Buyer

                              Pros

                                Cons

                                  Best Uses

                                  • Family Photos
                                  • Weddings/Events

                                  Comments about Canon ST-E3-RT Speedlite Transmitter:

                                  perfect

                                  • Was this a gift?:
                                  • No

                                  Share this review

                                   
                                  5.0

                                  Perfect tool

                                  By Bruccio

                                  from Gloucester, MA

                                  About Me Semi-pro Photographer

                                  Verified Buyer

                                  Pros

                                  • Easy To Pack
                                  • Easy to Use
                                  • Lightweight
                                  • Reliable
                                  • Strong Construction

                                  Cons

                                    Best Uses

                                    • Sports/Action
                                    • Weddings/Events

                                    Comments about Canon ST-E3-RT Speedlite Transmitter:

                                    Canon's Speedlite accessories are the very best! The Wireless Transmitter works seamlessly and with total control. Great investment for pro or serious amateur.

                                    • Was this a gift?:
                                    • No

                                    Share this review

                                     
                                    5.0

                                    Speedlite Trans didn't miss a click

                                    By AV hippie

                                    from Minneoplis Minn

                                    About Me Pro Photographer

                                    Verified Buyer

                                    Pros

                                    • Easy to Use
                                    • Lightweight
                                    • Reliable
                                    • Strong Construction

                                    Cons

                                      Best Uses

                                      • Family Photos
                                      • Weddings/Events

                                      Comments about Canon ST-E3-RT Speedlite Transmitter:

                                      This unit was on over 10 hrs and still had battery life. Worked great with the 600-Rt flash units

                                      • Was this a gift?:
                                      • No

                                      Share this review

                                       
                                      5.0

                                      Makes a great system

                                      By Mark

                                      from Mystic

                                      Comments about Canon ST-E3-RT Speedlite Transmitter:

                                      The remote transmitter lets one get the flash unit off the camera and still have complete and easy control right from the transmitter. Easy to use and allows great creativity.

                                      Share this review

                                       
                                      5.0

                                      truly enjoying this product

                                      By antonio

                                      from Dallas TX

                                      About Me Pro Photographer

                                      Verified Buyer

                                      Pros

                                      • Easy to Use
                                      • Lightweight
                                      • Reliable
                                      • Strong Construction

                                      Cons

                                        Best Uses

                                        • Weddings/Events

                                        Comments about Canon ST-E3-RT Speedlite Transmitter:

                                        I got this transmitter and a couple of 600's, they work amazingly fine, is really easy to control the power on the flashes just using this transmitter. Ii was worth the investment.

                                        • Was this a gift?:
                                        • No

                                        Share this review

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