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My current flash setup is a standard shoe mount but I've been thinking about getting a remote.

I've been drooling over the Speedlite 600EX-RT. It uses radio to control slaves, which is nice (longer distance, doesn't require line of sight, etc.).

One thing I don't understand: do slaves also have to be 600EX-RTs or do other flash units use radio to communicate already? Can any (cheap?) flash slaves can be used with a Canon Speedlite 600EX-RT or do I need to buy the 600EX and a ST-E3-RT transmitter in order (or multiple 600EX-RTs) to have a radio-controlled remote flash setup?

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2 Answers 2

up vote 6 down vote accepted

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.

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Just to clarify that last statement, are you saying that a hotshoe mounted 600EX-RT could trigger a slave 430EX II ?? Thanks :) –  Mike Oct 19 '12 at 9:29
    
@Mike: Via optical triggering - yes. –  insignum Oct 19 '12 at 10:47
    
Yongnuo's come out with an YN-E3-RT transmitter unit that works with the 600EX-RT that can perform Groups mode on pre-2012 bodies, and power control over 600EX-RTs from non-Canon bodies. They're also rumored to be coming out with a 600EX-RT clone of their own, and add-on manual triggers for studio strobes that can be triggered from an RT master, but so far, no official announcements. –  inkista Jun 17 at 2:02

There are thirth made radio transceivers like PocketWizard Plus III , or Phothix odin , that perhaps could be used to trigger previus versios of canon flashes having as master the 600EX-rt no ?

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That's kind of what he was asking in the first place. Do you know if these work? If you don't know, this is probably best left as a comment rather than an answer. –  John Cavan Oct 25 '12 at 0:11

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