Canon Speedlite Transmitter ST-E3-RT II

CanonSKU: 5743B012
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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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TypeRadio transmissions wireless Speedlite transmitter
Compatible CamerasType A EOS cameras (E-TTL II/E-TTL autoflash)
Sync SpeedHigh-Speed Sync provided
Flash Exposure ConfirmationFlash exposure confirmation lamp lights in green
Wireless Functions
Transmission SystemRadio Transmission
Transmission RangeApprox. 98.4 ft. / 30m
Flash Ratio Control1:8 - 1:1 - 8:1, power 1/2-stop increments
Flash CoverageTransmission Angle: 360° all around
Receiver Operation ConfirmationGreen 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 CancellationThe test flash button can be pressed to test if the receiver units fire or cancel the auto power off status.
Power SourceAA/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 ModePower 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
Weight3.9 oz. / 110g (excluding battery)