* As of April 2022, the ST-E10 only works with the Canon EOS R3.
Controlling and changing the 5 independent groups across 15 Speedlites is as easy as pressing the menu button located on the transmitter and adjusting the settings from the vari-angle touchscreen on the back of the camera, or with the flash setting screen when using the Canon Camera Connect app on your smartphone. With full flash control at your fingertips, the Speedlite Transmitter ST-E10 is an indispensable tool for advanced, professional flash photography.
Using the multifunction hotshoe of compatible cameras, the Speedlite Transmitter ST-E10 gets its power from the camera itself, eliminating the need to remember to power off the transmitter or remembering to change batteries before a shoot.
Compact and lightweight.
In comparison to the ST-E3-RT II transmitter, the Speedlite Transmitter ST-E10 is approximately 30% smaller and approximately 50% lighter, taking up less room in the camera bag.
Control your flash settings remotely from the camera menu.
To change settings and control the off-camera Speedlites, simply press the menu button on the back of the transmitter and use the touchscreen on the back of the camera to manage all of your flash settings.
Use your compatible mobile device to control wireless Speedlite settings.
When connected to Canon’s Camera Connect app, you have the ability to change all of your settings from the flash setting screen on your smartphone with an intuitive and familiar tap and swipe.
Experience less interruptions and interference using radio-wave transmission.
Much more reliable than traditional line-of-sight transmission, the Speedlite Transmitter ST-E10 has a secure and constant 2-way communication with each individual Speedlite and Speedlite group, enabling changing settings such as mode, power, ratio changes, recycle status and more across a distance of up to 98.4 feet (30 metres).
Read: Full Specifications (on Canon’s website)