Canon ST-E2 IR Speedlite Transmitter

Canon ST-E2 IR Speedlite Transmitter

Canon ST-E2 IR Speedlite Transmitter

B&H # CASTE2 MFR # 2478A002

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Product Highlights

  • Clip-on Wireless Auto Flash Transmitter
  • Sets and Controls Flash Ratios
  • Wireless Infrared Pulse
  • E-TTL-TTL II Compatible
  • E-TTL Wireless Autoflash Control
  • Built-In AF Assist Beam
  • High-Speed FP Flash
  • Powered by 2CR5 Lithium (6V) Battery
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Canon ST-E2 overview

  • 1Description

The Canon ST-E2 IR Speedlite Transmitter is a dedicated E-TTL (II) wireless autoflash transmitter that can control an unlimited number of flashes with Canon Speedlites 420EX, 430EX, 430EXII, 550EX, 580EX and 580EX in two separate groups; A and B.

The ST-E2 sets and controls all functions of its slave units. The flash output ratio between groups A and B can also be adjusted from 8:1 to 1:1 or from 1:1 to 1:8.

Under low-light or low-contrast conditions it emits an AF-assist beam linked to the camera's focusing points.

Note: 420EX/430EX cannot be used as the master slave to trigger other flashes.

Compatible Canon Speedlites 420EX, 430EX, 430EXII, 550EX, 580EX and 580EX II
Compatible Cameras: Type A EOS cameras (E- TTL, autoflash); type B EOS cameras (Manual flash).
Compatible models include: EOS 1D Mark II N, 20D/60D/70D EOS-1Ds MARK II, EOS 5D Mark III, PowerShot G3, PowerShot G5, PowerShot G6, PowerShot G7 and PowerShot G9
Flash Ratio Control: For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps
High- Speed Sync (FP flash): Enabled with high-speed sync mode
Slave Operation Confirmation: With test transmission button. *Slave A fires followed by slave B at 1/64 output
AF-assist Beam: Compatible with EOS-3's 45-point Area AF and 28mm and longer lens focal lengths
SE Feature: While the power switch is set to I or HOLD, the transmission turns off automatically after about 90 seconds of non-use
UPC: 082966581533
In the Box
Canon ST-E2 IR Speedlite Transmitter
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Canon ST-E2 specs

    Transmission System Infrared pulse
    Transmission Range Indoors: Approx. 39.4-49.2' / 12-15 m
    Outdoors: Approx. 26.2-32.8' / 8-10 m
    Transmission Coverage ±40° horizontal and ±30°vertical
    Power Source 2CR5 lithium (6V) battery
    Dimensions 2.4 x 2.0 x 3.1" / 62 x 51 x 80 mm
    Weight 3.5 oz / 100 g (excluding battery)
    Packaging Infoyvwyffdt
    Package Weight 0.4 lb
    Box Dimensions (LxWxH) 6.1 x 3.5 x 2.7"

    Canon ST-E2 reviews

    ST-E2 IR Speedlite Transmitter is rated 4.3 out of 5 by 237.
    Rated 4 out of 5 by from Wireless Freedom This unit works as advertised. It lets you control remotely a compatible Canon Flash head (or several). It works great indoors, but there are some limitations relating to the infrared communication. RF (Radio Frequency) signals would be much better because line of sight would not be required. The 'user interface' also seems to be coming from a different decade. The unit is also much bigger than expected. Using the flash off camera, conserving ETTL capability is very useful. I recommend this unit. I wish for an updated version though, smaller and using more reliable RF signals. This would improve outdoors performance too.
    Date published: 2009-01-05
    Rated 5 out of 5 by from An essential accessory to have! I've been using two Canon 580EXII shoe-mount flashes for some time now, and occasionally run into a situation where the IR transmission between the two is simply not powerful enough to trigger the slave. No problems with this unit! I used this transmitter a couple weeks ago for a school portrait shoot and was very impressed. It's simple to use and does exactly what it needs to. If I had to make one complaint, it would be in reference to the odd battery this unit uses. I'm no expert in power supply, so I'm sure there is a valid reason for it. However, if you find yourself without a backup - good luck finding another one of these batteries within 1,000 miles! Just make sure to pack extras!
    Date published: 2008-12-07
    Rated 5 out of 5 by from Very satisfied with mine. I use mine to trigger three 430EXs. I've no complaints, performance wise, that are not inherent to optical triggering. (Although a native Canon RF based wireless solution would be AWESOME!) I also use it as a focus assist when taking lower light natural light pics. It'll make a lens that likes to hunt snap to as if it were plenty bright. (Makes my Canon EF 50mm f/1.8 II seem like a much better lens.) The only real complaint I've got is that it has no battery life indicator, it just dies, and it takes a somewhat unusual battery. (Why not AA or AAA?)
    Date published: 2009-08-15
    Rated 4 out of 5 by from Very Useful Works great with the 580 and 430 speedlites. Indoor use allows the infrared signal to bounce off of walls which increases the areas in which you can place the flashes. Very easy to control more than one flash. Radio feature allows for precise control over each groups flash output or compensation. Only con has to be that the transmitter will only point forward. It would be very thoughtful of Canon to update this allowing the Transmitter to be rotated or tilted just like the Speedlites, allowing for more flexibility with outdoor use. For now, a user will have to use the OC-E3 Off Camera Shoe Cord to allow the transmitter to be aimed at any location. This would be 5 stars if it would rotate and tilt. I use this for weddings.
    Date published: 2010-06-29
    Rated 4 out of 5 by from Great flash accessory I have always looked at the ST-E2 as an unnecessary accessory. Basically it is a 550EX without the flash. But having two canon speedlites on small stands I needed a compact way to control them. The ST-E2 offered a compact light way to control them wirelessly. Though very simple in its basic operation can sometimes get confusing in advanced setup. But after a few uses it is very easy to get very comfortable with it. I can control lighting ratios from the unit itself. It may not be reliable in outdoor situations, especially in open areas where the light has nothing to bounce off of. But its use indoors is very reliable and great to work with . I now always use it with my indoor photography.
    Date published: 2008-09-05
    Rated 3 out of 5 by from Great device for activating my 2 Speedlites 430EX IIs. Works good. Nice and light weight. One Major Problem: I have noticed this device tends to run down the batteries, even when the power is shut off, and that there are no rechargeable batteries in market for this model. Bad move on the designer’s part. Fortunately for me I have rigged up my own rechargeable batteries and modified the switch to prevent it from drawing current. I'm not going to spend anymore money buying new batteries for this. I would give it 5 Stars if it did not have this battery problem.
    Date published: 2010-07-08
    Rated 5 out of 5 by from Perfect for off camera flash control! I shoot many weddings and family portraits both inside and outside; I wanted a portable lighting system and needed transmitter that would allow me to control my 580EX and 580EX II Canon flashes off camera. The ST-E2 transmitter is the perfect addition to my setup. I am able to use both Canon flashes, set each flash to the light output ratio desired, and fire them with the ST-E2 Canon Transmitter. I shoot with a partner and we are able to separate our Canon flashes in group setups, shoot on the same grounds, and not interfere with each other's ability to capture the images. Can't get much better than that!! If you are looking for dependable transmitter to control an off camera flash system, then the dedicated E-TTL ST-E2 Canon Transmitter should be in your camera bag!
    Date published: 2009-01-28
    Rated 5 out of 5 by from I love my ST-E2! As an event photographer I occasionally need to place some speedlights in odd places to light the event. The ST-E2 works great for this and for portrait work. It's easy to set up and I still get my ETTL. My only drawback is range. Occasionally I will need to get a shot in a room to large for the ST-E2 to work properly. But that is the only problem I have had with it.
    Date published: 2008-12-08
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