Canon ST-E3-RT Remote Flash Control Transmitter

product overview
product overview
  • 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 Panel
  • Buttons With Back Lighting
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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. The ST-E3-RT represents the next generation in wireless flash systems.

Note: Because it does not have an optical transmission function, the Speedlite Transmitter ST-E3-RT is not compatible with earlier Speedlite models such as 580EX II.

Newly-designed wireless system uses 2-way radio wave communication for enhanced communication among master and slave units. Achieves a transmission distance of up to 98.4' (30 m), all at a 360 degree angle.
Up to 5 groups, or 15 individual flashes can be controlled via 1 transmitter.
Supports E-TTL II flash, manual flash, stroboscopic and auto external flash metering.
Dot matrix LCD panel displays all pertinent information simultaneously and backlit control panel means easy operation.
8 types of custom functions, 3 types of personal functions.
Improved hot shoe contacts for more reliable information transmission and operation.
Slave operation confirmation:
Green Light--Lit: Radio Transmissions Okay
Red Light--Lit: Not Connected
Blinking: Transmission Error/ Too many units
Orange Light--Lit: Sub-master transmission
Blinking: Receiving remote release shooting, linked shooting signal
Not compatible with earlier Speedlite models such as 580EX II
  • MPN - STE3RT
  • GTIN - 13803142488
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TypeRadio transmissions wireless Speedlite transmitter
Flash Ratio ControlRatio control: 1:8 - 1:1 - 8:1, power 1/2-stop increments
Transmission RangeApprox. 98.4 ft. (30m)
Battery Type2x AA/LRG Alkaline Batteries (Ni-MH and Lithium batteries can also be used)
Battery Life: Approx. 10 hours continuously when using AA/LR6 alkaline batteries (At a room temperature of 73F/+23C).
Dimensions67.4 x 61.5 x 77.4 mm
Weight110 g excluding battery
CoverageFlash coverage: Transmission Angle: 360 all around
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.
AF Assist BeamN/A
Flash Exposure ConfirmationFlash exposure confirmation lamp lights in green
* If it does not light, shooting is not performed with the standard exposure
Sync SpeedHigh-Speed Sync provided (EOS-1D X and EOS 5D Mark III only)
CompatibilityType A EOS cameras (E-TTL II/E-TTL autoflash)
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What’s In The Box

Canon ST-E3-RT Remote Flash Control Transmitter

  • Canon ST-E3-RT Remote Flash Control Transmitter x 1
  • Soft Case x 1

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