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Canon Speedlite Transmitter A

4.5 4.5 out of 5 stars 610 ratings

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ST-E3-RT

Purchase options and add-ons

Brand Canon
Compatible Mountings Canon
Camera Flash Slave
Included Components SPEEDLITE TRANSMITTER
Connectivity Technology Wireless

About this item

  • 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.
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  • SPEEDLITE TRANSMITTER
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    Product guides and documents

    Product Description

    Product Description

    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 (Master units + slave units = more than 16 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

    From the Manufacturer




    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

    4.5 out of 5 stars
    4.5 out of 5
    610 global ratings

    Customers say

    Customers like the quality, ease of use, controls, and radio of the camera flash. For example, they mention it works great as master, slave, and covers a wide angle. They appreciate the intuitive layout of menu options and easy to decipher icons. They also appreciate the ability to trigger and manipulate settings on multiple 600EXs through the in-built transmitter. That said, opinions are mixed on the value.

    AI-generated from the text of customer reviews

    261 customers mention244 positive17 negative

    Customers are satisfied with the quality of the camera flash. They mention that it works great as master, slave, and covers a wide angle. The flash is very powerful, and reliable. The AF assist seems to work better than with the 580EX-II or a 430EX II, and it outperforms any radio transmitter they have used.

    "...Welcome to a new world of reliability, simple setup, and battery life...." Read more

    "...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..." Read more

    "...HINT: The 580 and 600 flashes work best with lithium AA batteries. You get a lot more flashes than with alkaline batteries...." Read more

    "...Click-click-click with absolutely reliable firing every time. What a pleasure; what a relief.It's also a pleasure in a studio setup...." Read more

    73 customers mention66 positive7 negative

    Customers find the camera flash easy to use. They say it has an intuitive layout of menu options, using easy-to-use controls. They also appreciate the easy-decipherable icons and the fact that the menu is easily accessible. Customers say the flash can be controlled easily through the menu on the on-camera flash or in the onboard computer. They mention that the manual is well organized and clearly written.

    "...I find this much easier to navigate, set modes, etc.This is too expensive, you say?..." Read more

    "...This is pretty minor and easy enough to do. Keep in mind if using external triggers you will need one on each flash...." Read more

    "...I keep this flash in “slave” mode.The 600 below is much easier to use and more versatile...." Read more

    "...Easy as pie. For once I could switch sides, or move my assistant to the other side, without worrying about line-of-sight...." Read more

    39 customers mention39 positive0 negative

    Customers are satisfied with the controls of the camera flash. They mention that it is easy to trigger and manipulate settings on multiple 600EXs through the in-built transmitter. They also appreciate the ability to manually control the off-camera flashes and change settings. Customers also appreciate that the controls allow them to set groups as manual, ettl, or auto, and adjust ratios for A/B or multi-stop shooting. Overall, they are happy with the functionality and performance of the product.

    "...The RF signaling system and fully independent group controls right from your master device will change everything for you...." Read more

    "...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...." Read more

    "...I love, love, love the ability to manually control the off-camera flashes and change setting on the fly. Battery performance is great...." Read more

    "...of radio wireless, longer zoom range, and the ability to control 5 groups of Speedlites instead of just 3 as in previous Canon Speedlites...." Read more

    30 customers mention30 positive0 negative

    Customers like the radio in the camera flash. They say it's very easy to setup and use, and the wireless RF transceiver has worked flawlessly. The RF signaling system and fully independent group controls right from the camera make the radio signaling flawless. Customers also appreciate the remote wireless advantage and the built-in radio communications seem to work flawlessly, and connection is almost immediate.

    "...The RF signaling system and fully independent group controls right from your master device will change everything for you...." Read more

    "...1. The built-in radio communications seems to work flawlessly, and the connection is almost immediate2...." Read more

    "...models, including its predecessors, are the menu system and having wireless capability. Both of those completely change the way you use a flash...." Read more

    "...Major improvements over the 580EX-II are the addition of radio wireless, longer zoom range, and the ability to control 5 groups of Speedlites..." Read more

    17 customers mention12 positive5 negative

    Customers like the fit of the camera flash. For example, they mention it fits better on the hotshoe, is smaller and lighter than an additional flash, and is a compact, cheaper alternative to controlling their EX600s. Some like the width of coverage, from 20mm to 200mm, with the extendable panel, and find it easy to adjust.

    "...I like the width of the coverage, from 20mm-200mm, with the extendable panel bringing it to 14mm...." Read more

    "...well, and the menus allow for so much customization, plus are a lot easier to adjust...." Read more

    "...The bounce card is a bit too small to be very useful..." Read more

    "...The ST-E3-RT is compact and light thanks to its lack of a AF assist light and battery...." Read more

    13 customers mention10 positive3 negative

    Customers like the weight of the camera flash. They mention that it is very light, an excellent tool for offshoe flash lighting, and now in a single unit, which translates to less gear to carry.

    "...(flash + wireless trigger) is now in a single unit, which translates to less gear to carry. This was a significant factor for me...." Read more

    "...The ST-E3-RT is compact and light thanks to its lack of a AF assist light and battery...." Read more

    "...Build Quality, Fast Recycling Time, Great Locking System, Big But Not To Heavy..." Read more

    "...And with size comes weight, so keep that in mind, too. This sucker is heavy. I'm also kind of confused as to why nobody talks about this flash...." Read more

    63 customers mention34 positive29 negative

    Customers are mixed about the value of the camera flash. Some mention that it's well worth the price and the effort, while others say that it is an expensive unit, too fiddly, unreliable, and useless to use.

    "...have to sell all your old speedlites at a huge loss, but it's worth it for your sanity...." Read more

    "...This is too expensive, you say?..." Read more

    "...They work great so far and are considerably cheaper than adding a Pocket Wizard to a new 580EX and probably similarly priced to adding a Pocket..." Read more

    "...my 680EX-RT's hot-shoe mounts stiffly slide in like cheap slabs of poorly machined metal...." Read more

    15 customers mention6 positive9 negative

    Customers are mixed about the syncing of the flash. Some mention that it works well, and has no problems connecting. That said, others say that it's not easily synced with other Canon flashes, has a slow sync speed, and doesn't support rear-curtain sync.

    "...Until I get the other two 600EX-RTs, the radio transmission is useless...." Read more

    "...-in radio communications seems to work flawlessly, and the connection is almost immediate2...." Read more

    "...on older Canon Cameras like the 7D is that the fastest shutter sync speed is reduced by a stop when using radio wireless...." Read more

    "...These are more consistent than any other transmitter I have ever used and that includes Radio Poppers, PWplusIIs, CyberSyncs, and FlexTT5s...." Read more

    Five Stars
    5 Stars
    Five Stars
    Performs as advertised with 5DS and 430RTs. Absolutely spot-on exposure. Great for product photography.
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    Top reviews from the United States

    Reviewed in the United States on June 20, 2012
    Style: 600EX-RTVerified Purchase
    244 people found this helpful
    Report
    Reviewed in the United States on April 7, 2012
    Style: 600EX-RTVerified Purchase
    83 people found this helpful
    Report

    Top reviews from other countries

    Translate all reviews to English
    Xin Ge
    5.0 out of 5 stars Very fast shipment, strongly recommend!
    Reviewed in Canada on September 16, 2019
    Style: ST-E3-RTVerified Purchase
    alovi
    5.0 out of 5 stars Excelente flash para canon
    Reviewed in Mexico on January 27, 2018
    Style: 600EX-RTVerified Purchase
    Murali dharan
    5.0 out of 5 stars Five Stars
    Reviewed in India on March 16, 2018
    Style: 600EX-RTVerified Purchase
    Amazon Customer
    5.0 out of 5 stars Five Stars
    Reviewed in India on May 15, 2017
    Style: ST-E3-RTVerified Purchase
    Danielle Conley
    5.0 out of 5 stars Five Stars
    Reviewed in Canada on December 3, 2016
    Style: 600EX-RTVerified Purchase