Canon Speedlite Transmitter ST-E3-RT (Ver. 3) for Type A EOS Cameras with Hot Shoe and LCD Panel

The Canon Speedlite Transmitter ST-E3-RT (Ver.3) provides continued support for Canon DSLRs that feature a standard hot shoe (not compatible with multi-function shoe-equipped cameras). Many of the most popular features carry over to version 3, such as wireless rear curtain synchronization to capture ambient light trails and convey a sense of speed for moving subjects. An expansive minimum output range (down to 1/8192 power), and FE Memory as part of the radio transmitter so you can lock in an E-TTL flash exposure level, even in complex multi-flash set-ups, and continue to use it for the same scene or subject. Radio-controlled, two-way wireless transmission up to 98.4 feet, up to five groups or fifteen individual Speedlites, a dot matrix LCD with backlighting, intuitive controls, and more.
Rear Curtain Synchronization, a Minimum Output Range of 1/8192, and FE Memory
When used in combination with the Speedlite EL-1, the Speedlite Transmitter ST-E3-RT (Ver.3) provides additional benefits of wireless rear curtain synchronization so the flash fires as the shutter closes to capture beautiful light trails to signify movement of the subject, minimum flash power as low as 1/8192 for even more opportunity to work in low available light, and FE memory so you can store an E-TTL flash exposure and continue to use that same exposure when subjects and scenes remain unchanged.
Up to 5 groups, or 15 Individual Flashes can be Controlled via 1 Transmitter
The Speedlite Transmitter ST-E3-RT (Ver.3) facilitates radio-controlled, two-way wireless transmission up to 98.4 feet, for a reliable and robust connection among sender and receiver units. Communicating on 2.4 GHz frequencies, the ST-E3-RT (Ver.3) does not have the same directional limitations as traditional wireless optical transmitters. Where other wireless signals can be interrupted by physical obstacles, radio-controlled systems excel. Fifteen transmission channels are available, selectable manually or automatically (for optimum radio transmission, depending on the environment), and radio transmission IDs can be set to prevent interference from other photographers on the same channel. With the extended, more reliable range afforded by radio transmission, ambitious photography is made easier.
Supports E-TTL II Flash, Manual Flash, Stroboscopic, and Auto External Flash Metering
With the Speedlite Transmitter ST-E3-RT (Ver.3), up to fifteen Canon RT-compatible Speedlites in five groups can be controlled from the camera, via a single transmitter. Each group can be set to a different flash mode, enabling multiple configurations for creative photography. For example, with the ST-E3-RT (Ver.3) some flashes can be directed to operate according to the camera’s E-TTL flash reading, others can be set manually - groups can be set to overexposure or underexpose, and much, much more. With up to fifteen flashes under the control of one transmitter, wirelessly, complex lighting setups normally reserved for the studio are a breeze.
Dot Matrix LCD Panel Displays all Pertinent Information Simultaneously and Backlit Control Panel means Easy Operation
The Speedlite Transmitter ST-E3-RT (Ver.3) features a dot matrix LCD panel (172 x 104 dots). This LCD displays Flash status, flash settings, and wireless configuration for any combination of Speedlite EL-1, 600EX-RT series, and 430EX-RT, used off-camera as Receiver units. With the transmitter’s LCD screen combined with backlit operation buttons and even an internal sound emitter, the ST-E3-RT (Ver.3) is as easy to operate in the dark as in daylight.