Canon Speedlite Transmitter ST-E3-RT - With USA Warranty

SKU: CASTE3 MFR: 5743B002
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About the Canon ST-E3-RT

Canon Speedlite Transmitter ST-E3-RT is compact in size but with strong capabilities which make it almost a must-have for Speedlite 600EX-RT owners.

With the same radio-based wireless transmission abilities as a "master" 600EX-RT unit, it frees a Speedlite up for use off-camera, and can control up to fifteen flashes up to 98.4 feet (30m) off-camera and that's over a full 360° range. The Canon ST-E3-RT has thes ame advanced LCD panel and control as the 600EX-RT, and is powered by two AA-size batteries. Unlike the Speedlite Transmitter ST-E2, the ST-E3-RT is not compatible with the existing optical-type wireless flash system, and it does not have a built-in AF-assist beam.

The Canon ST-E3-RT is commonly used for Family photos, Portraits, Sports/action, Studio, Travel, Weddings and more.The Canon ST-E3-RT is most used by customers who consider themselves to be a Pro photographer among others.The Canon ST-E3-RT is popular because customers like the following qualities of the Canon ST-E3-RT: Durable, Easy to use, Lightweight, Packs small / compresses, Reliable, Strong construction and Superior build quality.

Canon ST-E3-RT Includes

  • Soft Case
  • Canon 1 Year Warranty

Summary of Customer Reviews

Customers most agreed on the following attributes:
Lightweight (13) , Reliable (13) , Easy to use (11) , Packs small / compresses (5) , Durable (4) , Strong construction (4) , Superior build quality (4) , Quiet (3)
Best Uses:
Portraits (7) , Family photos (6) , Studio (6) , Weddings (6) , Travel (5) , Sports/action (4) , Everyday (3)
Reviewer Profile:
Pro photographer (5) , Photo enthusiast (3) , Enthusiast (2) , Semi-pro photographer (2) , Casual user (1) , Photography student (1) , Professional (1) , Semi-professional (1)

Canon ST-E3-RT Features

  • Lightweight and affordable way to trigger one to 15 Speedlite 600EX-RT units forradio-based Wireless E-TTL
  • Compatible for E-TTL automatic wireless flash with nearly all EOS Digital SLRs*,with all units firing at even power, or choice of A:B or A:B C flash ratios between groups of speedlites
  • E-TTL, Manual flash, or Multi-mode manual flash possible with nearly all EOS Digital SLRs*
    * Original EOS-1D and EOS-1Ds are not compatible with Canon's radio-based wireless flash for automatic E-TTL exposure; Manual or Multi-mode flash only
  • Revolutionary new "Group" mode with EOS 5D Mark III and EOS-1D X bodies independent control of up to five groups of off-camera Speedlite 600EX-RT units
  • Original EOS-1D and EOS-1Ds are not compatible with Canon's radio-based wirelessflash for automatic E-TTL exposure; Manual or Multi-mode flash only

Canon ST-E3-RT Specifications

Type Radio transmissions wireless Speedlite transmitter
Compatible Cameras Type A EOS cameras (E-TTL II/E-TTL autoflash)
Sync Speed High-Speed Sync provided (EOS-1D X and EOS 5D Mark III only)
Flash Exposure Confirmation Flash exposure confirmation lamp lights in green
If it does not light, shooting is not performed with the standard exposure
AF Assist Beam N/A
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
Slave Operation Confirmation Green Light
Lit: Radio Transmissions Okay

Red Light
Lit: Not Connected
Blinking: Transmission Error/ Too many units (Master units + slave
units = more than 16 units)

Orange Light
Lit: Sub-master transmission
Blinking: Receiving remote release shooting, linked shooting signal
Slave Unit SE Mode Cancellation The test flash button can be pressed to test if the slave 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 Battery Life: Approx. 10 hours continuously *When using AA/LR6 alkaline batteries used (At a room temperature +23°C/73°F).
SE Mode Power off after 5 min. of idle operation
Dimensions (WxHxD) 2.7 x 2.4 x 3.1" (67.4 x 61.5 x 77.4mm)
Weight 3.9 oz (110g)
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