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.

Barcode (UPC / EAN): 13803142488

Speedlite Transmitter ST-E3-RT

Flash modes

Auto exposure control
High speed sync (FP)
Manual / output settings Manual steps
Strobe / output settings
Frequency

E-TTLII/E-TTL
Yes
Yes - 1/1- 1/128
1/3 step
Yes - 1/4-1/128
1-500Hz (199Hz using optical  slave function)

Flash-related function

FE lock
Flash exposure compensation
Flash exposure bracketing Second-curtain flash sync Modelling flash
Colour temperature info communication

Yes
Yes
Yes
Yes
Yes
No

Wireless flash

Transmitter
Transmission type Transmitter Max range approx
Slave
No of groups
No of channels
Remote Shutter Release

Yes
Radio
Indoors: 30m Outdoors: 30m 

No
5
15
Yes

AF Assist

AF-assist beam

No

Power  source

Battery
External  power supply

2 x AA batteries
No

Construction

Dust and  water resistance
Mounting foot material

Yes
Metal

Misc.

Custom function
Flash settings from camera menus 2
PC terminal
Compatible Accessories
Dedicated flash bracket

8 (3 personal functions)
No

No
SPEEDLITE 600EX-RT
No

Dimensions & weight

Size (W x H x D), mm  Weight (Excluding batteries), grams

67.4  x 61.5 x 77.4 3
110g

 

[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

 

Reviews

* Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours.