Canon Speedlite Transmitter ST-E3-RT Specifications

SpecificationsCanon Speedlite Transmitter ST-E3-RT
  Canon Speedlite Transmitter ST-E3-RT
Power: Guide No (ISO 100)
Angle of Flash Coverage  
With Diffuser
AF Assist Beam  
AF Assist Beam Type N/A
AF Assist Beam Points
AF Assist Beam Min Focal Length
AF Assist Beam Range – Center
AF Assist Beam Range – Periphery
Flash Exposure Modes  
Auto Exposure Standards Supported E-TTL II/E-TTL
External Auto Flash Exposure Sensor N
Manual Flash Exposure Y
Features Controllable from Flash  
High Speed Sync Y
Flash Exposure Lock (FEL)
Flash Exposure Compensation (FEC) Y
Flash Exposure Bracketing (FEB) Y
Second Curtain Flash Sync N
Modelling Flash Y
Color Temperature Info Communication N
Supports Flash Settings by Camera Menu
(Enables many options not available directly on the flash)
Custom Functions 8
Personal Functions 3
Wireless Flash Capabilities  
Wireless Flash Transmitter Capability Y
Wireless Transmission Type Radio
Transmitter Max Range – Indoors 98.4' (30m)
Transmitter Max Range – Outdoors 98.4' (30m)
Wireless Flash Slave Capability
Wireless Flash Groups 5
Wireless Flash Channels 15
Remote Shutter Release Capability Y
Flash Head Movement Range  
Flash Head Movement Up Fixed
Flash Head Movement Down
Flash Head Movement Left
Flash Head Movement Right
Flash Features  
Dust and Water Resistance Y
PC Terminal N
Power Source  
Power Source 2x AA
Number of Flashes (approx)
Recycling Time – NiMH (approx)
Recycling Time – Alkaline (approx)
External Power Source
Size (WxHxD) 2.65 x 2.42 x 3.05"
(67.4 x 61.5 x 77.4mm)

Weight 3.9 oz (110g)
Compatible Accessories
Dedicated Flash Bracket
Compatible Cameras All Canon EOS cameras
PowerShot G series cameras
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