Canon this past week announced the ST-E3-RT (Version 2) to not much fanfare. This comes ahead of the release of the new flagship flash, the Speedlite EL-1.

There has been no official announcement from Canon USA, but the new transmitter is available for preorder at US dealers.

Key Features

  • Up to 5 groups or 15 Individual Flashes can be Controlled via 1 Transmitter
  • Supports E-TTL II Flash, Manual Flash, Stroboscopic and Auto External Flash Metering
  • 8 Types of Custom Functions, 3 Types of Personal Functions
  • High-performance Hot Shoe Contacts for Reliable Information Transmission and Operation
  • Channels: 1 Channels
  • Connection Type: Hot Shoe
  • Equipment Type: Transmitter
  • Slave Type: Radio Slaves

Preorder: Canon ST-E3-RT Speedlite Transmitter, Version 2 $299

Press Release

Canon Europe today announces the ST-E3-RT(Ver.2) – an update of the popular ST-E3-RT transmitter. Enabling wireless flash synchronisation and multiple control of Speedlites – positioned up to 30m away – this new transmitter gives professionals greater creative freedom in both a studio and natural environment. It supports key features of the recently introduced Speedlite EL-1 and also enables new capabilities when using previously launched RT Speedlites – including wireless (radio) second-curtain synchronisationᶦ.

Other new features of the ST-E3-RT(Ver.2) include support for the Speedlite EL-1’s low-power 1/8192 micro flash, and for photographers who use manual flash, the transmitter boasts a new FE Memory mode.

High-quality, flexible capture

Through introducing radio wireless transmission and second-curtain synchronisation, the ST-E3-RT(Ver.2) releases the flash at the end of a long exposure. As a result, it helps photographers produce natural-looking images when capturing moving subjects. The ST-E3-RT(Ver.2) offers this feature as a new wireless option, giving users flexibility in a range of shooting scenarios.

When shooting with a large aperture and/or high ISO speed, the flash level can often overpower the subject and scene. This forces the photographer to change settings or set up, ultimately losing the look they desired. When partnered with the Speedlite EL-1iv, the transmitter’s 1/8192 micro flash adds beautifully subtle nuances of light without disrupting the atmosphere and ambient light reflected on set. This feature is perfect for fashion and portrait photographers looking to capture scenes with a natural atmosphere.

Building on the original transmitter’s flexible qualities, the ST-E3-RT(Ver.2) supports FE Memory – offering a quicker and more convenient manual flash set up. Alleviating the need for multiple test shots, professionals now have the option to perform an initial shot in E-TTL mode, capturing the E-TTL flash settings. Users can then switch the Speedlites to manual flash to allow for manual adjustments where needed – all whilst retaining the original E-TTL settings.

Maximising product life span

Canon Europe plans to offer a chargeable service update for existing ST-E3-RT users to include the new additional features and capabilities of the ST-E3-RT(Ver.2). Further information and dates of this service update will be announced later.

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