Canon - ST-E3-RT Wireless Speedlite Transmitter

The Canon ST-E3-RT Speedlite Transmitter can help you take full advantage of all the features on Canon's Speedlite 600EX-RT and 430EX III-RT flashes. The ST-E3-RT makes complex lighting setups simple by facilitating radio-controlled, two-way wireless transmission up to 98.4' away, among up to five groups or fifteen individual Speedlites. It has controls similar to the Speedlite 600EX-RT, including multiple flash metering options, and a variety of flash modes. Compact design with highly reliable construction combined with a clearly laid-out information panel and buttons with back lighting make this an indispensible tool for advanced professional flash photography.


  • Facilitates wireless transmission
  • 5 groups or 15 individual speedlites
  • Range up to 98.4'
  • Makes complex lighting setups simple
  • Compact design & reliable construction
  • Clearly laid out information display
  • Back-lit buttons