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Canon ST-E3-RT Speedlite Transmitter

by Canon
399 customer reviews
| 28 answered questions

List Price: $470.00
Price: $263.20 & FREE Shipping. Details
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ST-E3-RT
  • 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 ft. / 30m, all at a 360 degree angle.
  • Up to 5 groups, or 15 individual flashes can be controlled via 1 transmitter; 8 types of custom functions, 3 types of personal functions.
  • Supports E-TTL II flash, manual flash, strobe and external flash metering.
  • Dot matrix LCD panel displays all pertinent information simultaneously and backlit control panel means easy operation. It even features an internal sound emitter.
13 new from $263.20 8 used from $199.00 1 refurbished from $245.00
$263.20 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Canon ST-E3-RT Speedlite Transmitter + Sto-Fen OM-ET Omni-Bounce for Canon 600EX-RT Flash
Price for both: $275.69

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Style: ST-E3-RT

Technical Details

Product Description

Style:ST-E3-RT

Product Description

Canon Speedlite Transmitter ST-E3-RT 5743B002 Digital Camera Accessories

From the Manufacturer

Speedlite Transmitter ST-E3-RT

Speedlite Transmitter ST-E3-RT

For sophisticated wireless flash setups, there's nothing like the new Speedlite Transmitter ST-E3-RT*. Facilitating radio controlled, two-way wireless transmission up to 98.4 feet, among up to five groups or fifteen individual Speedlites, the ST-E3-RT represents the next generation in wireless flash systems. With operational controls similar to the new Speedlite 600EX-RT, including diverse flash metering options, and a number of flash modes, the Speedlite Transmitter ST-E3-RT makes complex lighting setups simple. With a compact design and highly reliable construction, combined with a clearly laid-out information panel and buttons with back lighting and more, the Speedlite Transmitter ST-E3-RT is an indispensible tool for advanced, professional flash photography.

*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 ft./30 m, all at a 360 degree angle.

The Speedlite Transmitter ST-E3-RT facilitates radio controlled, two-way wireless transmission up to 98.4 feet, for a reliable and robust connection among master and slave units. Communicating on 2.4 GHz frequencies, the Speedlite Transmitter ST-E3-RT does not have the same directional limitations of traditional wireless optical transmitters. Where other wireless signals can be interrupted by physical obstacles, radio controlled systems excel. Fifteen transmission channels are available, selectable manually or automatically, and radio transmission IDs can be set to prevent misfiring in the event of signal interference on the same channel. With the extended, more reliable range afforded by radio transmission, ambitious photography is made easier.

Up to 5 groups, or 15 individual flashes can be controlled via 1 transmitter.

With the Speedlite Transmitter ST-E3-RT, up to fifteen flashes in five groups can be controlled via a single unit. Each group can be set to a different flash mode, enabling multiple configurations for creative photography. For example, with the Speedlite Transmitter ST-E3-RT, some flashes can be directed to operate according to the cameras meter reading, others can be set manually; groups can be set to overexposure or underexpose, and much, much more. With up to fifteen flashes under the control of one transmitter, wirelessly, complex lighting setups normally reserved for the studio are a breeze.

Supports E-TTL II flash, manual flash, stroboscopic and auto external flash metering.

For any number of shooting styles, the Speedlite Transmitter ST-E3-RT supports E-TTL II flash metering, manual flash (1/1 to 1/128) and stroboscopic flash (1/4 to 1/128, 1 to 500 Hz). Auto external flash metering is even possible when the Speedlite Transmitter ST-E3-RT is mounted to the EOS-1D X or the EOS 5D Mark III.

Dot matrix LCD panel displays all pertinent information simultaneously and backlit control panel means easy operation.

The Speedlite Transmitter ST-E3-RT features an all-new dot matrix LCD panel (172 x 104 dots). This new LCD displays Flash status, flash settings and wireless configuration with more detailed information in comparison to previous systems. With its new screen combined with backlit operation buttons and even an internal sound emitter, the Speedlite Transmitter ST-E3-RT is as easy to operate in the dark as in daylight.

8 types of custom functions, 3 types of personal functions.

To accommodate the demands of a number of different shooting situations, the Speedlite Transmitter ST-E3-RT can be configured with eight types of custom and three types of personal functions. Custom functions include: auto power off, modeling flash controls, sound, illumination and more. Personal functions include display contrast and LCD panel illumination color for both master and slave flashes.

Improved hot shoe contacts for more reliable information transmission and operation; compact design is approx. 2.65 (w) x 2.42 (H) x 3.05 (D) in.

The Speedlite Transmitter ST-E3-RT is built to the standards one would expect from professional Canon camera systems. A newly updated hot shoe contact ensures reliable communication between camera and transmitter. Dust and water resistance is excellent as well: all moving parts and areas surrounding the transmitters display and buttons are sealed for uninterrupted performance in harsh conditions. A new dust and water resistant adapter for the mounting foot creates a dust and water resistant seal between camera and flash. Compact and lightweight, the Speedlite Transmitter ST-E3-RT is approx. 2.65 (w) x 2.42 (H) x 3.05 (D) in.


Product Details

Style: ST-E3-RT
  • Product Dimensions: 3 x 2.7 x 2.4 inches ; 3.8 ounces
  • Shipping Weight: 13.6 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B007FH1LJU
  • Item model number: 5743B002
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (399 customer reviews)
  • Amazon Best Sellers Rank:
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at Amazon.com: March 1, 2012

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

186 of 190 people found the following review helpful By Gavin Farrington on June 20, 2012
Style Name: 600EX-RT Verified Purchase
I sold all of my previous flashes and bought these. Previous flashes include Canon's 580exII, 580ex, and 430exII.

The Good:

First off, if you're a Strobist or an off-camera speedlighter, sell everything you own and get these. The RF signaling system and fully independent group controls right from your master device will change everything for you. Already using RadioPoppers or a PocketWizard FlexTT system? Welcome to a new world of reliability, simple setup, and battery life.

Going into "Gr" mode on the master flash, I can independently tell up to five different groups to operate in full eTTL mode (plus adjust each group's FEC) OR shift one, some, or all groups into M mode with full power controls on each group. I do this right from the flash itself, or from the screen on my 5d mark III.

Shooting a party with dancing? Want to have eTTL on-camera to bounce, and an off-camera light in the background on M for a little dramatic rim-lighting? No problem. All easily configured right from your camera.

Working outdoors at night with nothing to bounce off of? No problem. Tell the master unit on your camera not to flash, and it will simply operate as a master controller for the off-camera units. (If you often need a master controller with no flash, a Canon ST-E3-RT Speedlite Transmitter might save you a bit of money. )

If you get lost in the menus, use the configuration screen on your camera instead. I find this much easier to navigate, set modes, etc.

This is too expensive, you say?
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111 of 120 people found the following review helpful By Christopher Cooke on March 30, 2012
Style Name: 600EX-RT Verified Purchase
This is a great move for Canon. I know people are saying its too pricey and they could get full studio lights for this price. True, but not the same thing. I shoot both Canon and Nikon and this is an are where Nikon has always blown Canon away. Their flash system's wireless ability made me green with envy. I have been using Pocket Wizard mini and flex units and they work well. However, no need for them anymore. These work flawlessly so far. I bought 3 of them and will buy the ST-E3 when it comes out. I played wiht them tonight and the wireless communication is perfect. Some really cool features are built in. When you put one in slave mode, its screen turns orange and the master flash is green. Easy to tell which is which. You can configure the colors. Custom functions are now illustrated on the screen so no need to have the manual around to figure out what to do. The flash head is a little larger thean tthe 580EXII but the overall flash is almost exactly the same size. If you use an Omni Bounce, you will need to wait for a new version to fit this one. It does come with a gel holder and CTO gell. Nice touch. I will do some more shooting tomorrow, but my initial tests tonight make me a very happy reviewer. Nikon flash just moved to 2nd place. Radio is the way to go. :)
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84 of 94 people found the following review helpful By Cocoa Beach Surfer on April 6, 2012
Style Name: 600EX-RT Verified Purchase
I purchased 3 of these flashes from Amazon and plan on adding a fourth soon. I also have a pre-order placed for the Canon ST-E3-RT Speedlite Transmitter which I hope to receive sooner rather than later. The radio's on these flashes are awesome and the menu system is also greatly improved. One of my favorite features is the ability to use a master flash or the ST-E3-RT to control each of my flashes. The group mode is great, but can only be used with 2012 or newer Canon Cameras such as the Canon 5D MKIII which I also own. I tested the group mode on my Canon 5D MKII and it definetly does not work with that camera.

With the group mode you can have up to 5 groups total and set the power levels using either ETTL or Manual mode. I use a label maker and mark my flashes as A B C (and future will be D for the fourth flash). I still have one group left if I want to go to five flashes. If you have more than 5 flashes you can assign multiple flashes to the same group and their power settings will be the same. Using the Master you can easily switch the slaves remotely from either ETTL or Manual mode and set their power settings. When you turn on the flashes they come up quickly and link up before you are ready to shoot - mere seconds. I was really impressed with how the radios worked and it's so nice to have just one set of batteries and not have to hook up a bunch of external gear. These are a huge time saver.

One thing I will mention to those who may want to mix these with Studio Flashes. You can fire these from remote triggers just like the older Canon models as they have a PC input port.
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213 of 246 people found the following review helpful By A.H. on June 13, 2012
Style Name: ST-E3-RT
For what it's worth, this transmitter does control off-camera Canon brand 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. It's an in-camera external speedlite menu item at the bottom of the menu options.) 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.

I've also heard a few people in the industry comment about the placement of the screen facing upward rather than to the rear. I can see how this would be an inconvenience while shooting becaues it requires you to drop your camera off the tripod or monopod to chest or waist height to look at the screen or make adjustments with your free hand. It's a relevant design choice to be aware of. But it's an ergonomic consideration and not one of the design oversights that I'm addressing here. I'm just bringing it up because more than one person has mentioned that it was awkward to make group flash adjustments when they had it held at their waist level.
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Canon ST-E3-RT Speedlite Transmitter
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Price: $263.20
Ships from and sold by Amazon.com
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