Wireless Transmitter
Canon Speedlite Transmitter ST-E3-RT (Ver.3)
SpecificationsSpecifications
- Radio frequency remote flash trigger
- Fire selected Speedlites from 30m away
- Part of the E-TTL II flash system
- Controls up to 15 flashguns
- Remote camera triggering*
(*See specifications) - Weather sealed against dust and moisture
- Second curtain sync, down to 1/8192 power and FE memory for EL-1 and EL-5*
(*See specifications)
Specifications in detail
Flash Modes
- Auto Exposure ControlE-TTL II / E-TTL
- High Speed Sync (FP)Yes
- Manual / Output Settings
- Manual Steps1/3 step
- Strobe / Output Settings
- Stroboscopic Frequency1-500Hz
Flash-Related Function
- FE LockYes
- FE Memory
- Flash Exposure CompensationYes
- Flash Exposure BracketingYes
- Second-Curtain Flash Sync
- Modelling FlashYes
Wireless Flash
- TransmitterYes
- Transmission TypeRadio
- Transmitter RangeIndoors: 30m
Outdoors: 30m - ReceiverNo
- Number of Groups5 - A,B,C,D or E
- Number of Channels15
- Remote Shutter ReleaseYes9
AF Assist
- AF-Assist BeamNo
- Number of AF Points Supported-
- AF-Assist Beam Type-
Power Source
- Battery2 x AA batteries
- Minimum Recycling TimeN/A
- External Power SupplyNo
Construction
- Dust and Water ResistanceYes
- Mounting Foot MaterialMetal
Miscellaneous
- Custom Function8 (4 personal functions)
- Flash Settings from Camera MenusYes
- External Flash Exposure SensorNo
- Remote Release TerminalNo
- PC TerminalNo
- Accessories (Included)Soft Case
- Accessories (Optional)Off-Camera Shoe Cord OC-E3
- Compatible SpeedlitesEL-1, EL-5, 600EX II-RT, 600EX-RT, 430EX III-RT
Physical Specifications
- Dimensions (W x H x D)67.4 x 61.5 x 77.4
- Weight106g
- Compatible cameras may need the latest firmware update.
- Minimum flash output of 1/8192 possible with Speedlite EL-1 only, or 1/1024 with EL-5 (1/128 with high-speed sync). Does not show in the camera's UI settings on cameras launched before 2020.
- Compatible cameras may need the latest firmware update.
- Minimum flash output of 1/8192 possible with Speedlite EL-1 only, or 1/1024 with EL-5 (1/128 with high-speed sync). Does not show in the camera's UI settings on cameras launched before 2020.
- Compatible cameras may need the latest firmware update.
- Flash output amount may slightly differ between that of E-TTL autoflash and manual flash
- Compatible cameras may need the latest firmware update.
- With compatible cameras launched from 2020, e.g. EOS-1D X Mark III, EOS R5/R6 and later, but excluding EOS 850D.
- Remote release from receiver and receiver function of linked shooting are not available when using Speedlite Transmitter ST-E3-RT (Ver.3) with cameras equipped with an N3 remote control terminal and compatible with E-TTL II/E-TTL autoflash, released in or before 2011.