430EX Mk I: Pop-Up Slave Mode?

The 600D's on board flash can act as a master for the 430EX.  Just keep in mind that the 430EX cannot act as a master, but only slave.

Aoi Usagi wrote:

The 600D's on board flash can act as a master for the 430EX. Just keep in mind that the 430EX cannot act as a master, but only slave.

Thanks for the reply.

So the 600D's on board flash can trigger the 430EX, but the 430EX cannot trigger other flashes?

stevet1 wrote:

brians1209 wrote:

I've used other flashes like the Godox TT685C with my 600D, and the pop-up flash on my 600D allows me to fire my TT685C wirelessly, which had been very useful.

I am planning to also buy the 430EX Mk I, and I wonder if my 600D can also fire it wirelessly with its pop-up flash like I did with my TT685C?

Brian,

If I am reading this correctly, it can, but only wirelessly - no radio compatibility - which means it requires direct line of sight.

You might want to visit Canon's support page for the 430EX here: and look at the manual.

"E-TTL II
The Speedlite 430EX is fully compatible with the distance linked E-TTL II system found on recent EOS cameras, and supports other EOS cameras that do not support E-TTL II, when required. For a complete multiple flash system, the Speedlite 430EX serves as a wireless slave when either the Speedlite 580EX, Macro Ring Lite MR-14EX, Macro Twin Lite MT-24EX, or Speedlite Transmitter ST-E2 is used as a master."

https://www.usa.canon.com/support/p/speedlite-430ex

"For wireless flash, the 470EX-AI offers optical-type wireless E-TTL only — no radio compatibility. And, it can only be used off-camera as a wireless Receiver flash… it cannot be used on-camera as a Sender unit, to trigger any off-camera Receiver Speedlites.

As an optical-type Receiver flash, however, it can be combined with any previous or current Canon Speedlites having optical wireless E-TTL ability, with different Speedlite models mixed and matched as you desire. The Receiver sensor is on the front face of the flash, and this can be swiveled to face more directly at the on-camera Sender unit as needed, to maximize distance from the camera, and reliability in bright ambient light situations. As before, an unlimited number of Receiver flashes can be used off-camera with Canon’s optical-type wireless flash, as long as they’re within range of the optical signals from the Sender unit on the camera."

Steve Thomas

Thanks for the reply.

If it works by using my 600D's pop-up flash as a master, seems enough for me, I don't plan to use more than one off-camera flash gun, or even use ETTL wirelessly. (yet, maybe sometime in the future).

Thanks again.