CANON Speedlite ST-E3-RT Transmitter


Product code: 170296

Product features

  • Range: up to 30 m
  • Fire up to 15 Speedlites remotely
  • E-TTL II flash control
  • Weather sealed against dust & moisture

Product features

  • Range: up to 30 m
  • Fire up to 15 Speedlites remotely
  • E-TTL II flash control
  • Weather sealed against dust & moisture
Product information

Top features:

- Solid wireless flash control for professional shoots

- Build and trigger a multi-flash lighting setup

- Control your DSLR remotely with control for up to 15 cameras

- Simple, weather-sealed design for ease of use

Solid wireless flash control

With the Canon Speedlite Transmitter ST-E3-RT in your photographic arsenal, you can control up to 15 compatible Canon Speedlite flashguns (each sold separately) from up to 30 m away.

The transmitter uses a 2.4 GHz radio frequency for reliability, allowing you to shoot confidently and accurately outdoors and around corners - essential when sightlines are obscured.

Build and trigger a multi-flash lighting setup

For inventive studio and field shoots, you can build a complex multi-flash lighting setup with up to 15 Speedlite flashes (each sold separately) – then fire them remotely with one camera-mounted ST-E3-RT Speedlite Transmitter.

Control your exposures easily with E-TTL II flash metering to get the results you want.

Control your DSLR remotely

If your EOS camera is fitted with a Speedlite Transmitter ST-E3-RT, you can trigger it from a second unit, or from a compatible Speedlite flashgun like the Speedlite 600EX-RT. Achieve incredible creative and professional results with synchronised shooting using up to 15 cameras.

Simple, weather-sealed design

Helping you shoot for longer outdoors, the ST-E3-RT is weather-sealed to withstand dust and moisture, made to match the standard of professional EOS cameras and L-series lenses.

The backlit LCD screen allows for easy reading so you can check your settings quickly, even in challenging or dim conditions.

Technical specifications for CANON Speedlite ST-E3-RT Transmitter

Brand compatibility Canon
Flash metering E-TTL II (Canon)
Other features - Trigger up to 15 compatible Speedlite flashguns
- Trigger up to 15 compatible EOS cameras for synchronised shooting
- Range: up to 30 m
- 2.4 GHz radio-frequency control even when direct line of sight is not possible
Power source AA batteries x 4
Dimensions 61 x 67 x 77 mm (H x W x D)
Weight 110 g
Manufacturer's guarantee 1 year
Customer reviews

Speedlite ST-E3-RT Transmitter reviews verified by reevooReevoo

2 reviews

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(10.0 out of 10)
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(10 out of 10)


Larbert GB Photographer
Works every time
expensive but worth it
Confirmed purchase: 20 June 2018
Published on: 03 August 2018
(10 out of 10)


North Yorkshire GB Enthusiastic photographer
With this great piece of kit and compatible camera you can use high speed sync with your Speedlite off camera up to 30m away out of line of sight! Why? So that you can photograph something/someone into the sun with a very high shutter speed and wide open aperture producing a narrow depth of field. Lots of possibilities.
Confirmed purchase: 03 June 2017
Published on: 05 July 2017
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If you wish to return this item, please call us on 0344 561 1234 or email, remembering to quote your order number.

CANON Speedlite ST-E3-RT Transmitter