Canon Speedlite Transmitter ST-E3-RT - Manual (Page 66)

64
Type
Radio Transmission Wireless Function
Specifications
Type: On-camera Speedlite transmitter
Compatible cameras: EOS type-A camera compatible with E-TTL II/E-TTL autoflash
Exposure control system: E-TTL II/E-TTL autoflash, manual flash, stroboscopic
flash, auto external flash metering*
* Only when the flash mode is set to <[>
Frequency: 2405 - 2475 MHz
Modulation system: Primary modulation: OQPSK, secondary modulation:
DS-SS
Channel: Auto, Ch. 1 - 15
Wireless radio ID: 0000 - 9999
Slave unit control: Up to 5 groups (A/B/C/D/E), up to 15 units
Transmission distance: Approx. 30 m / 98.4 ft.
* When there are no obstacles or obstructions between the
master unit and slave unit, and no radio interference with
other devices
* The transmission distance may be shorter depending on
the relative positions of the units, surrounding environment
and weather conditions.
Flash ratio control: 1:8 - 1:1 - 8:1, 1/2-stop increments
Flash exposure
compensation: ±3 stops in 1/3- or 1/2-stop increments
FEB: ±3 stops in 1/3- or 1/2-stop increments (when used with
flash exposure compensation)
FE lock: Press the camera’s , <7> or
button
High-speed sync: Provided
* High-speed sync is possible only with EOS digital cameras
released since 2012.
Manual flash: 1/1 - 1/128 power (1/3-stop increments)
Stroboscopic flash: Provided (1 - 500 Hz)
Slave flash battery check: On the master unit’s LCD panel, the icon lights, the
slave unit’s AF-assist beam emitter blinks and the
charge lamp lights.
Flash exposure
confirmation: Flash exposure confirmation lamp lights
Modeling flash: Fired with camera’s depth-of-field preview button
Linked shooting: Provided
COP
Y