Canon ST-E3-RT Speedlite Transmitter
SKU code: 21135
- Radio Transmitter for Firing Off-Camera Flashes
- 2.4Ghz Frequency provides Reliable Operation
- Up to 30m Range
- Controls up to 50 Flashguns
- Capable of Triggering Canon 5D MarkIII or 1Dx
- Weather Sealed against Dust and Moisture
With the Canon ST-E3-RT Speedlite Transmitter you can fire compatible Speedlite flashguns such as the Canon 600EX-RT over distances of up to 30m. Radio-frequency control in the 2.4GHz range provides reliable operation even when direct line-of-sight is not possible. Create multi-light setups controlling up to 15 flashguns with a single camera-mounted ST-E3-RT. And full E-TTL II flash metering makes exposure control easy. Remote triggering* of the camera’s shutter is also possible with the ST-E3 and a 600EX-RT flash unit. The ST-E3-RT is also weather sealed against dust and moisture making it ideal for professional photographers who require a weatherproof radio trigger solution for when using off-camera flash.
* With a shoe-mounted ST-E3-RT and 600EX-RT when used with the EOS 5D Mark III or EOS 1Dx. Other compatible EOS DSLR’s with an N3 remote connection will require an optional SR-N3 Release Cable.
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Speedlite Transmitter ST-E3-RT |
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Flash modes |
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Auto exposure control |
E-TTLII/E-TTL |
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Flash-related function |
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FE lock |
Yes |
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Wireless flash |
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Transmitter |
Yes No |
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AF Assist |
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AF-assist beam |
No |
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Power source |
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Battery |
2 x AA batteries |
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Construction |
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Dust and water resistance |
Yes |
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Misc. |
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Custom function |
8 (3 personal functions) |
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Dimensions & weight |
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Size (W x H x D), mm Weight (Excluding batteries), grams |
67.4 x 61.5 x 77.4 3 |
[1] Time taken to recharge flash after full discharge using Alkaline AA batteries
[2] With compatible cameras only
[3] Except for the dust and water prevention adaptor
* Specifications subject to change by the manufacturer without notice