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.
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.
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.
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.
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|
|Flash exposure compensation||Yes|
|Flash exposure bracketing||Yes|
|Second-curtain flash sync||No|
|Colour temperature info communication||No|
|Transmitter Max range approx.||Indoors: 30m |
|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)|
|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|
|Size (W x H x D), mm||¹ Except for the dust and water prevention adaptor|