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Canon ST-E3-RT Speedlite Transmitter

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More control with a wireless flash

The Canon STE3RT Speedlite Transmitter wireless flash setup gives you more control to make shooting easier. The radio wave transmitter communicates to your camera at 2.4 GHz frequencies from up to 30 metres away for remote wireless detection. Keep it powered with AA batteries and enjoy peace of mind knowing it's weather resistant.

Off-camera wireless control

Pair the Canon STE3RT Speedlite Transmitter to other flashes with wireless radio transmission, giving you the ability to control up to 15 flashes over five groups. You’ll have complete wireless control to shoot up to 30 metres away for professional-level flash photography. With 2.4 GHz frequencies, it has no limitations to achieve the perfect light.

Customise your settings

Save time setting up your speedlight by making the most of the pre-set functions. Or, make it your own with custom settings. Set it up to automatically turn the power off or control the flash, sound or illumination just the way you like it. This flexibility makes complex lighting setups simple.

Backlit light for dim settings

The dot matrix LCD screen makes it incredibly clear and easy to see with the backlight, even in dimly lit situations. With an intuitive menu control and clearly laid out information panel, you can easily navigate the settings during your shoots even when your hands are full of camera equipment.

Get the right angle

Achieve more control with your shooting with a 360-degree transmission angle. Take your flash photography to the level it needs to give your shots that ultimate professional feel. You’ll be able to light your subject perfectly to create beautifully lit portraits with the ideal angle.

Compact, weatherproof and reliable

With a dust and water resistant construction, you can work just about anywhere with this speedlight. Whether it’s in the rough outdoors or exposed to moisture, you won’t need to worry about the weather while you’re shooting. It’s small and mighty, with a reliable construction that can take on any situation. It even runs on AA batteries so you won’t need to worry about carrying a battery pack.

Pairs with multiple flash meters

As it has controls similar to the new Speedlite 600EX-RT, this Canon STE3RT speedlite transmitter includes multiple flash metering options. You won’t be concerned about if it will work with your equipment. The hot shoe ensures reliable communication between camera and transmitter, so you can rely on it to get the lighting right.

More Information
Type Flashes and Speedlites
GTIN/UPC Code 13803142488
Coverage Flash coverage: Transmission Angle: 360° all around
Dimensions 2.65 x 2.42 x 3.05" (67.4 x 61.5 x 77.4 mm)
Power Source 2x AA/LRG Alkaline Batteries (Ni-MH and Lithium batteries can also be used)
Shipping Weight (Kg) 0.2000
Brands Canon
Choose Style Body Only

How can I achieve the best exposure?

Use an E-TTL (evaluative-through the lens) Canon EOS flash exposure system to get the best exposure possible, enabling you to adjust the exposure to the desired level.

Which flash unit does this transmitter pair with?

This transmitter can connect to 430EX RT III and or 600EX RT II to easily help you control every aspect of each speedlite.

Which battery works well with this speedlite transmitter?

Always use Eneloop or EneloopPro battery as it will be lighter on the back pocket over the long run with a shorter recycle time as these battery are designed to run on powerful devices such as this.

Can I reset the transmitter?

As with most Canon Speedlites, you can always use the clear sequence to reset the transmitter back to the factory setting. Just make sure you’re aware that you’ll have to reconnect it if reset.

  • Canon ST-E3-RT Speedlite Transmitter
  • Soft Case
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