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  • Canon ST-E3-RT Speedlite Transmitter
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Canon ST-E3-RT Speedlite Transmitter

by Canon
| 25 answered questions

List Price: $470.00
Price: $270.00 & FREE Shipping. Details
You Save: $200.00 (43%)
Only 10 left in stock.
  • 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.
20 new from $269.95 4 used from $228.99 3 refurbished from $284.04

Frequently Bought Together

Canon ST-E3-RT Speedlite Transmitter + Canon 600EX-RT  Speedlite Flash (Black) + Sto-Fen OM-ET Omni-Bounce for Canon 600EX-RT Flash
Price for all three: $780.99

Buy the selected items together



Product Details

  • Product Dimensions: 3 x 2.7 x 2.4 inches ; 3.8 ounces
  • Shipping Weight: 13.6 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B007FH1LJU
  • Item model number: 5743B002
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (85 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: March 1, 2012

Product Description

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.

Customer Reviews

Works flawlessly paired with Canon Speedlite 600EX-RT.
Mirza Hasanefendic
With all that said, yes, they should have added focus assist but then you would not have any fill light on those fast paced shoots.
ProPhotographer1
I set both flashes to slave, turned on the transmitter and it worked great.
sjh

Most Helpful Customer Reviews

196 of 227 people found the following review helpful By A.H. on June 13, 2012
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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33 of 37 people found the following review helpful By V. rioseco on September 28, 2012
I don't know what canon was thinking when they released this with no focus assist beam.
Even though the 5D mark III has a AF sensitive down to -2EV, it's still not enough for low light places.

Could have been awesome, but we are forced to buy another 600EX. It still works awesomely when you dont need an AF assist beam.
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22 of 26 people found the following review helpful By Jonathan Balch on July 16, 2012
It has all the needed functions to drive the 600ex-rt flashes, but the thing that bugs me most is that the screen is in a fixed position pointing up. This means that you have to look on the top of the camera to change any of the settings. It would make more sense to have it be able to tilt up if need be. It is pretty much useless if it is above eye level and you don't want to move your camera to see it. If price isn't an issue, just get another 600ex-rt to use as a master.
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14 of 17 people found the following review helpful By An Average Joe on September 10, 2012
Doubtless, all of your off-camera-flash (OCF) strobists are wondering if it's worth the money. In short, yes. Whether on-camera or off, this is the Ferrari of flash guns. If you can afford it, buy this along with a Canon Speedlite 600EX-RT Flash and don't look back. Yes, cheap, knock-off triggers with manual flashes will do exactly the same thing in the right hands (Phottix Stratos, Cactus V5, Yongnuo, Cowboy Studio, etc.). Yes, there are even cheaper options offering ETTL and features not found on the ST-E3-RT such as AF Assist (Phottix Odin, Yongnuo YN-622). For users of one of the new camera bodies (5D Mark III, 1D X), the lack of AF Assist is not a huge deal. I very seldom have a problem locking focus with my 5D Mark III, even in low light. For users of the 5D Mark II and older bodies this will be a bigger issue, but only if very low light is a common situation for you.

Canon really did their homework and have hit a towering home run. It's not just the features, but the little things. For example:

- It's not just pretty with it's dot matrix display, but incredibly useful, intuitive, and fast to use. I usually read the manual the instant I get a new product, but this commander is completely self-explanatory for an experienced photographer. It's a mirror image of the 600EX-RT control panel, and that's a REALLY GOOD THING.
- Dedicated buttons for the most important camera functions (e.g. MODE -no ore holding the ZOOM button!), with four buttons that change labels and function as required.
- Dedicated "LINK" lights for instant visual confirmation. Customizable, color coded screens for master/slave that are easy to read.
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4 of 4 people found the following review helpful By John Maio on October 11, 2013
Verified Purchase
The ST-E3-RT transmitter is a great adjunct to my 3 600RT flash units. It works especially well when I need to photography large groups and separate the flash unite for even coverage.

The only possible downside is that it does not emit an IR focusing beam like the 600's do the 5Diii needs to have enough ambient light to focus on its own. Not a biggie, but buyers should be aware of that.
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8 of 10 people found the following review helpful By privatebydesign on December 2, 2012
Verified Purchase
For what it is, a 600EX-RT without the actual flash, this is a superb product, even for pre 2012 bodies despite Canon's warnings. By now everybody who is interested in one knows it does not have an AF assist beam, but why? The ST-E2 had one but then it needed a light emitting tube to communicate with the Slaves, but the omission from the ST-E3-RT smacks of a bean counters input or a near sighted oversight rather than a well thought out product.

Having touched on that one negative, and it isn't like the specs cover it up, I have nothing but praise for these units, slimline, same exact interface as the 600's, vastly improved functionality just make this a must have if you don't want on camera fill.

Killer new features that might prove useful for some would be, the ability to use slaves with multiple masters, anybody working a reception with two bodies or a second shooter will love this feature as you can share full control over one set of slaves, also the ability to fire the camera remotely via a flash when the ST-E3-RT is camera mounted, for fill flash and accent lighting on layered interiors this is a huge time saver, I can walk around the room and fire the camera from the flash I am holding and aiming!

As I mentioned, despite the warnings from Canon, this system works very well on pre 2012 bodies, in my case 1Ds MkIII's, HSS works at all speeds, max sync is maintained at 1/250 and whilst you don't get Group Mode you do get 1/3rd stop adjustment in Manual Mode and ETTL II works well if you understand what it is doing. As I have never had a Group Mode I don't miss it, but the only use I could see for it for me, would be at a reception with the Slaves on M and the on camera on ETTL, but this situation is irrelevant with the ST-E3-RT!
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