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Canon ST-E2 IR Speedlite Transmitter

BH #CASTE2 • MFR #2478A002
Canon ST-E2 IR Speedlite Transmitter
Key Features
  • Clip-on Wireless Auto Flash Transmitter
  • Sets and Controls Flash Ratios
  • Wireless Infrared Pulse
  • E-TTL-TTL II Compatible
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.
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Canon ST-E2 Overview

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

Canon ST-E2 Specs

Transmission SystemInfrared pulse
Transmission RangeIndoors: 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 Source2CR5 lithium (6V) battery
Dimensions2.4 x 2.0 x 3.1" / 62 x 51 x 80 mm
Weight3.5 oz / 100 g (excluding battery)
Packaging Info
Package Weight0.48 lb
Box Dimensions (LxWxH)6.2 x 3.45 x 2.65"
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question

I'm using a Wescott Reflector mounted on a tripod. I want to mount my 580 EXII to the reflector tripod and the transmitter to my camera. What do I use to mount the Flash to the tripod? I don't want to be wired to the tripod with a synch cord (thus getting this system) but I don't have anything other than a synch cord for mounting to the tripod setup.
Asked by: Jennifer A.
Hi. I just saw your question from a few years back and I thought I would chime in too. Check out something like this: https://www.bhphotovideo.com/c/product/1305521-REG/impact_dub_2_deluxe_umbrella_bracket_with.html It's a bracket that you can attach a flash or a transmitter to and also attach a soft box. I use a Westscott softbox and kit comes with a cold shoe mount in the kit. I think the Godox transmitter and receiver would be a cheaper solution and a better solution if the flash is hidden by a softbox or reflector. Good luck.
Answered by: Jonathan
Date published: 2020-01-09

WIll this work with the nissin i40?

WIll this work with the nissin i40?
Asked by: Jason
This can be used for eTTL with the Nissin i40.
Answered by: Reuben
Date published: 2019-10-11

Does this work with godox AD600 pro?

Does this work with godox AD600 pro?
Asked by: Sanjeev
The ST-E2 cannot trigger the Godox AD600 Pro. It can only trigger Canon speedlites optically.
Answered by: Kirk
Date published: 2019-01-18

Will the Speedlite Transmitter ST-E2 trigger the ...

Will the Speedlite Transmitter ST-E2 trigger the Canon 470EX AI?
Asked by: Karl
Yes, the Canon ST-E2 Speedlite Transmitter is compatible for use with the Canon Speedlite 470EX-AI Flash when used in optical wireless transmission mode.
Answered by: Manzell
Date published: 2018-11-14

question

Can I use this transmitter with a 6D? I want to fire my 580EX II off camera.
Asked by: Jose
Yes, the Canon ST-E2 Speedlite Transmitter is compatible for use with both the Canon EOS 6D DSLR camera and the Canon 580EX II Speedlite Flash. You may use the Canon ST-E2 Speedlite Transmitter on your Canon EOS 6D DSLR camera to wirelessly trigger the Canon EOS 580EX II Speedlite Flash.
Answered by: Manzell L.
Date published: 2018-08-27

question

would the infra-red focus assist light function of the ST-E2 work with a Nikon D850?
Asked by: johan v.
Unfortunately, the AF assist beam would not function if the ST-E2 is mounted on a Nikon D850.
Answered by: Kirk R.
Date published: 2018-08-27

question

Has anyone used this as strictly a focus assist tool in low light situations (without a flash)? I have one and it's never let me down, in/out doors but I'm trying to use less flash, had a lot of focus issues last wedding (dark venue). I tried experimenting around the house last night, seems to work just wondering if anyone uses it for this purpose, thanks.
Asked by: Joseph
Yes you could use this Canon ST-E2 Speedlite Transmitter for that purpose, it has a built-in AF Assist Beam.
Answered by: Andrea O.
Date published: 2018-08-27

question

Will this work for canon 6D HSS in manual mode or will it be limited
Asked by: william s.
This Canon ST-E2 Speedlite Transmitter is not listed as being compatible with the Canon 6D camera, the Canon ST-E3-RT Speedlite Transmitter is recommended for it instead.
Answered by: Jacob C.
Date published: 2018-08-27
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