Canon Speedlite Transmitter ST-E3-RT II

CanonSKU: 5743B012

Sale price$299.99
  • Updated to include Wireless Rear Curtain Synchronization
  • High-performance Hot Shoe Contacts
  • 8 Types of Custom Functions, 3 Types of Personal Functions
  • Supports E-TTL II Flash, Manual Flash, and more
  • Speedlite Transmitter ST-E3-RT II


  • Limited 1-Year Warranty

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Type Radio transmissions wireless Speedlite transmitter
Compatible Cameras Type A EOS cameras (E-TTL II/E-TTL autoflash)
Sync Speed High-Speed Sync provided
Flash Exposure Confirmation Flash exposure confirmation lamp lights in green
Wireless Functions
Transmission System Radio Transmission
Transmission Range Approx. 98.4 ft. / 30m
Flash Ratio Control 1:8 - 1:1 - 8:1, power 1/2-stop increments
Flash Coverage Transmission Angle: 360° all around
Receiver Operation Confirmation Green Light
Lit: Radio Transmissions Okay
Red Light
Lit: Not Connected
Blinking: Transmission Error/ Too many units (Sender units + receiver units = more than 16 units)
Orange Light
Lit: Sub-sender transmission
Blinking: Receiving remote release shooting, linked shooting signal
Receiver Unit SE Mode Cancellation The test flash button can be pressed to test if the receiver units fire or cancel the auto power off status.
Power Source AA/LRG Alkaline Batteries x2(Ni-MH and Lithium batteries can also be used) Battery Life: Approx. 10 hours continuously *When using AA/LR6 alkaline batter- ies used (At a room temperature +23°C/73°F)
SE Mode Power off after 5 min. of idle operation
Dimensions (W x H x D) 2.65 x 2.42 x 3.05" / 67.4 x 61.5 x 77.4mm
Weight 3.9 oz. / 110g (excluding battery)