Does "slave" on Canon Speedlite 420EX work same as a "slave unit" of years ago?

Posted on 2007-07-21
Medium Priority
Last Modified: 2008-01-09
I have a Canon G6 digital camera and a Canon Speedlite 420EX flash. I know the flash has a slave you can turn on. In the old days, a "slave unit" on a secondary flash would make the secondary flash go off if there were another flash in the room (nearby) [whether you wanted it to go off or not].
Can anyone simply tell me whether or not I can use that same set up...In other words, take a flash picture with my G6 and have my 420EX also flash? If so, how?
Question by:dgage123
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LVL 38

Accepted Solution

lherrou earned 2000 total points
ID: 19541145

Yes. In fact, if triggered by an advanced Canon TTL-managed flash (one where the actual flash is controlled by the TLL light measurements of the camera itself), the 420EX will also be controlled by the camera in slave mode. I'm a Nikon user, so I can't tell you exactly how to turn this on, but if you examine the settings on the back of the flash, you should be able to set it into slave mode. If a non-TTL flash fires, the 420EX will also fire at the settings set on the flash itself. If a TTL flash fires, it should send a signal to control the 420X.


Author Comment

ID: 19541182
I will look at the 420EX instruction manual again and see if it makes more sense.
[I actually found my ancient slave unit and used it with my ancient Vivitar 283, but it would only work once...and it would not fire again unless I either turned it on and then off...or if I fired it manually. I don't know why but that is another situation.]
Thanks for your answer and I will let you know (within the next few days) how it works.

Author Comment

ID: 19563242
Since I only have a Canon G6, I really think the 420EX is much too much flash for what I need...I am probably going to sell it on eBay, especially since my 25 year old Vivitar 283 still works. (I just wish I had taken the 420EX out of the box sooner and played with it instead of waiting for two years.)
Thanks for your help.

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