Can the Canon 600EX-RT control non-RT flash units by radio?
Asked 10/17/2012
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I’m considering a Canon Speedlite 600EX-RT for off-camera flash. I understand its RT system uses radio, which gives better range and doesn’t require line of sight.
What I want to know is whether the remote flashes also have to support Canon’s RT radio protocol, or whether I can use other flash units as cheaper radio slaves. In other words, if I want a radio-controlled setup with a 600EX-RT, do I need additional RT-compatible units (such as another 600EX-RT or an ST-E3-RT with RT-capable flashes), or can standard Canon/non-Canon flashes join the system directly?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
6
Unfortunately, no.
As of today (October 17th, 2012), built-in radio-controlled wireless flash setup with Canon 600EX-RT speedlites limits you just to two options:
- 600EX-RT master with 600EX-RT slaves
- ST-E3-RT master with 600EX-RT slaves
Optical wireless mode, on the other hand, allows 600EX-RT master to trigger non-600EX-RT slaves, but that's not what you are after.
Originally by user10547. Source · Licensed CC BY-SA 4.0
user10547
13y ago
0
Generated from our catalog & community — verify before relying on it.
For Canon’s built-in RT radio system, the remote flash must speak the Canon RT protocol. A 600EX-RT cannot directly use ordinary non-RT flashes as radio slaves.
So, for native Canon RT radio control, your options are RT-compatible gear only: originally the 600EX-RT with either another 600EX-RT or an ST-E3-RT transmitter, and later other RT-compatible units such as Canon’s 430EX III-RT/600EX II-RT and some third-party RT-compatible clones/receivers.
If you want to use older or non-RT flashes, the 600EX-RT can still work with them in Canon’s optical wireless system, but that is line-of-sight optical control, not radio.
A separate third-party radio trigger system is another path, but that would be outside Canon’s built-in RT system.
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