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Canon Speedlite Transmitter ST-E3-RT
Speedlite Flash
Canon Speedlite Transmitter ST-E3-RT
A radio-frequency flash trigger aimed at professional photographers using off-camera flash.
Fire compatible Speedlite flashguns over distances of up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.
Benefits
- Radio frequency remote flash trigger
- Fire selected Speedlites from 30m away
- Part of the E-TTL II flash system
- Controls up to 15 flashguns
- Remote camera triggering
- Weather sealed against dust and moisture.
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Detailed Features
Reliable off-camera flash control
Control compatible Canon Speedlite flashguns over distances up to 30m. 2.4GHz radio frequency triggering operates reliably, even when shooting outdoors and around corners – direct line of sight not required.
Multiple flash photography
Create intricate multi-flash lighting set ups, triggering up to 15 Speedlite flashes with a single camera-mounted Speedlite Transmitter ST-E3-RT. E-TTL II flash metering makes exposure control easy.
Remote camera control
Trigger an EOS camera fitted with a Speedlite Transmitter ST-E3-RT from a second unit or from a compatible Speedlite flashgun, such as the Speedlite 600EX-RT. Up to 15 cameras can be triggered at once, for synchronised shooting.
Easy to use design
The Speedlite Transmitter ST-E3-RT is sealed against dust and moisture to the same degree as professional EOS cameras and L-series lenses. It features an easy to read back-lit LCD control screen and is powered by two AA/LR6 batteries.
| Auto exposure control |
E-TTLII/E-TTL/TTL |
| High speed sync (FP) |
Yes |
| Manual / output settings |
Yes - 1/1-1/128 |
| Manual steps |
1/3 step |
| Strobe / output settings |
Yes - 1/4-1/128 |
| Frequency |
-500Hz |
| FE lock |
Yes |
| Flash exposure compensation |
Yes |
| Flash exposure bracketing |
Yes |
| Second-curtain flash sync |
No |
| Modelling flash |
Yes |
| Colour temperature info communication |
No |
| Transmitter |
Yes |
| Transmission type |
Radio |
| Transmitter Max range approx. |
Indoors: 30m
Outdoors: 30m |
| Slave |
No |
| No. of groups |
5 |
| No. of channels |
15 |
| Remote Shutter Release |
Yes |
| Battery |
2 x AA batteries |
| External power supply |
No |
| Dust and water resistance |
Yes |
| Mounting foot material |
Metal |
| Custom function |
8 (3 personal functions) |
| PC terminal |
No |
| Compatible accessories |
SPEEDLITE 600EX-RT |
| Dedicated flash bracket |
No |
| Size (W x H x D), mm |
67.4 x 61.5 x 77.4¹ |
| Weight (Excluding batteries), grams |
110g |
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