Fire up to 15 compatible Speedlite flashguns over distances of up to 30m. The updated Canon Speedlite Transmitter ST-E3-RT(Ver.2) enables all the wireless radio features of the Canon Speedlite EL-1, including wireless second curtain synchronisation, low power (1/8192) output and Flash Exposure (FE) memory. It also enables support for some of these additional capabilities with other compatible Speedlite models. The 2.4GHz radio frequency triggering operates reliably, even when shooting outdoors and around corners, meaning that having a direct line of sight is not required. Trigger an EOS camera fitted with a Speedlite Transmitter ST-E3-RT(Ver.2) from a second unit or from a compatible Speedlite flashgun, such as the Speedlite 600EX II-RT. Up to 15 cameras can be triggered at once, for synchronised shooting. Benefits Supports wireless second curtain sync and Flash Exposure (FE) memory with compatible cameras/Speedlite, plus 1/8192 nuance lighting with the EL-1 Radio frequency remote flash trigger Fire selected Speedlites from 30m away Part of the E-TTL II flash system Ideal for creative flash photography as it controls up to 15 flashguns Remote camera triggering for up to 15 cameras at once for synchronised shooting Weather sealed against dust and moisture What\'s in the box Canon Speedlite Transmitter ST-E3-RT(Ver.2) Soft Case Compatibility EOS 100D EOS 250D EOS 40D EOS 650D EOS 6D EOS 10D EOS 5D EOS 60D EOS M/ EOS M2 EOS R5 EOS-1Ds EOS 1100D EOS 20D EOS 30D EOS 400D EOS 50D EOS 5D Mark II EOS 5DS / 5DS R EOS 70D EOS D60 EOS M10 EOS M200 EOS R6 EOS-1D X /EOS-1D C EOS-1D X Mark II Speedlite EL-1 EOS 5D Mark IV EOS 60Da EOS 750D /760D EOS 80D EOS M6 EOS R/RA EOS-1D Mark III EOS-1D Mark IV EOS-1Ds Mark II Speedlite 430EX III-RT EOS 200D EOS 500D EOS 600D EOS 77D EOS 7D EOS 850D Speedlite 600EX-RT EOS 2000D / EOS 1300D EOS 550D EOS 6D Mark II EOS 700D EOS 7D II EOS M3 EOS M5 EOS-1D X Mark III Speedlite 600EX II-RT EOS 1200D EOS 300D EOS 5D Mark III EOS 800D EOS M50 EOS M6 Mark II EOS RP EOS-1D EOS 350D EOS 4000D EOS 450D EOS 90D EOS D30 EOS-1D Mark II / N EOS-1Ds Mark III EOS R3