Canon ST-E2

The Canon Speedlite Transmitter ST-E2 features Sync Speed High-Speed Sync (FP flash): Enabled with high-speed sync mode; AF Assist Beam Compatible with EOS-3’s 45-point Area AF and 28mm and longer lens focal lengths, Effective Range: Approx. 0.6 to 10m/2.0 to 16.5 ft along the periphery (in total darkness).; Transmission Range Indoors: Approx. 12-15 m/39.4 – 49.2 ft; Outdoors: Approx. 8-10 m/ 26.2-32.8 ft; Flash Ratio Control For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps. The Canon ST-E2 measures 62 (W) x 51 (H) x 80 (D)mm/2.4 (W) x 3.1 (D) in. and weighs 100g/3.5 oz (exluding battery).

Overall Rating: ★★★★☆ | Latest Price Info

Expert Reviews

Canon ST-E2 Expert Reviews

Luminous-landscape reviews the Canon ST-E2 and writes;
“Furthermore, the ST-E2 can trigger two different flash units at the same time and these can have different lighting ratios. In fact you can have more than 2 units remotely fired by grouping them together on the same channel. This makes for a very sophisticated wireless, multi-unit flash setup. If your style of shooting needs this capability you’ll find the ST-E2 does an admirable job.”
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The-digital-picture reviews the Canon ST-E2 and writes;
“The Canon Speedlite Transmitter ST-E2’s flash master effective range is 39-49′ indoors and 26-32′ outdoors. Used indoors, direct line of sight is often not required as the light bounces from walls and other objects to reach the flash units.”
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User Opinions

Canon ST-E2 User Reviews

Great indoors, | Rating: ★★★★☆
“I have been using this unit to fire my 430ex and 550ex flashes. It works flawlessly indoors. It can auto focus in complete darkness and the flashes do not need to be in line of site. Outdoors is another matter. It’s difficult to line up the sensors even at close distances. Not that it’s impossible, but it will require some patience.” – By Sean Rainer

Convenient alternative to RF (with caveats), | Rating: ★★★★★
“I can’t complain about this unit. It costs far less than an RF solution like the PocketWizard, preserves E-TTL flash metering, and adds as little gear to my camera bag as possible, at least compared to lugging, charging, and connecting RF transceivers. Of course it doesn’t have the range of RF, requires line of sight, and doesn’t perform as reliably outdoors, so ultimately it comes down to what your needs are.” – By Derek

When it works, it works great – It’ll do., | Rating: ★★★★☆
“For fast, ad-hoc throwdowns where I don’t have time to set the shot up perfectly, I’ll use this thing with ETTL and let the camera meter the shots. This is what I imagine this thing will be best for: clackering off quick shots without thought, when time is tight, let the camera’s meter do the work. So while this device is perfectly fine indoors…it’s outdoors that it starts to cool off – better at night, oddly, but still not great unless the flash units are pretty close to the emitter. I knew that going in, though, so I’ll limit my review to indoor stuff.” – By Schuylercat

Off Camera Flash, | Rating: ★★★★★
“I am very happy that I decided to invest in this Transmitter. I had read for some time that many photographers follow a rule never to use a camera mounted flash. I don’t subscribe 100% to that rule, but when I want to use an off camera flash, or multiple flash units this is a dream come true.” – By Robert Pavelsky

Very handy tool, | Rating: ★★★★★
“I purchased this little item to aid in taking pictures at my first wedding. It worked nicely in a large worship center using both the 550ex and 430ex Speedlites and a 30D. I still haven’t used it to its fullest but continue to learn. I’ll add more to this in the future but just wanted to comment on this handy tool.” – By Donovan Martin

Good entry into off-camera flash control, | Rating: ★★★★★
“I have been using one of the Gary Fong Lightspheres with great results in casual portraits at gatherings or events. But for more formal portraits, I’d like to be able to do some side lighting, and yet keep it simple and mobile. Goal 1 was to get the flash off the camera, and onto a stand. I debated whether to go the more expensive route of radio control, but decided that for the first round, this would be fine. So far, in experiments around the house, it works great – there are limitations as to range and visibility, but it is not as if there needs to be direct line of sight between the STE2 and the flash.” – By Oliver Bogler

Get that flash off your camera, | Rating: ★★★★☆
“I’ll just say that this product does exactly what it claims to do. It’s limitation (needing to have a direct line of sight to the flash) takes some getting used to but if you can make that happen, it works. I’m glad I bought it because there are times that E-TTL is just easier but it’s not a perfect solution. That being said, I’m not sure that a perfect solution exists yet.” – By Jeffrey A. Cleveland

Great way to get the flash off the camera, | Rating: ★★★★☆
“For a long time, I wanted to get the flash off the camera; and there are only a few options: Flash cord, STE-2, and Radio transmitters, to name a few; the STE-2 is a great compromise. It works great indoors; it even works outdoors; although, not as good as indoors. It works 90% of the time if you are in a shaded area; about 50% of the time in direct sunlight (depending on distance) I used it to shoot my daughter 50 feet away under some trees and it worked.” – By Jahre Zugbi


Canon ST-E2 User Manual

– Download Canon ST-E2 User Manual (PDF – 1.2MB)

Features & Specifications

Canon ST-E2 Features & Specifications

The Canon Speedlite Transmitter ST-E2 is compatible with Type A EOS cameras (E-TTL, auto flash) and Type B EOS cameras (manual flash). The ST-E2 is designed to control slaved Canon 550 EX flashes, enabling simultaneous flash use in professional settings. The wireless controller has a flash ratio control, allowing for several different A:B ratios, 1:8 to 8:1 in half-step increments, as well as slave confirmation via a test transmission button, which sets off slave A, followed by slave B, at 1/64 output.

* Wireless flash controller for the Canon 420EX and 550EX and other Canon flashes.
* Indoor transmission range of approximately 40 to 50 feet
* Outdoor transmission range of approximately 26 to 33 feet
* 1,500-transmission battery life
* Turns off after 90-second idle

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