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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 08 Sep 2009 (Tuesday) 09:22
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580EXII Remote Question

 
z06-jim
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Sep 08, 2009 09:22 |  #1

I'm just starting to experiement with remote flash operation with my three 580EXII's using one as 'Master' and the other two 'Slaves'.
I am a bit confused on the max. number of remote slaves that one 580EXII 'Master' will control?
Is it 9 slaves total with a max. of three in each of the groups A, B, & C...?


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apersson850
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Sep 08, 2009 10:03 |  #2

The master doesn't know how many slaves are in each group, so there's no hard limit like that.

But if you have a large number of slaves in one group, and use E-TTL, the master may not be able to set the power low enough on these slaves to avoid overexposure, as they all add up.


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jdfotos
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Sep 11, 2009 03:43 |  #3

Sorry to hijack your thread, but was hoping you can answer a question about the 580 for me... can I fire it off camera, using my studio flashes? (I want to use one as a third light)
Or do I need other expensive remote equipment? I already have a wireless trigger for my studio flashes. Thanks for any help!


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m3rdpwr
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Sep 11, 2009 10:19 |  #4

apersson850 wrote in post #8604881 (external link)
The master doesn't know how many slaves are in each group, so there's no hard limit like that.

But if you have a large number of slaves in one group, and use E-TTL, the master may not be able to set the power low enough on these slaves to avoid overexposure, as they all add up.

Not to get too far off topic, but when I read with the 7D having a commander that it could control only 4 flashes in each group I wasn't sure how to interpret.

Now I'm not sure if I misunderstood what it said.

It could have meant that the onboard flash was in fact its own group meaning 4 groups existed now or whatever.

My understanding of the 580EX as a commander is it doesn't matter how many were in the same group.

But anyway, sorry to hijack...

-Mario


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wmcy
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Sep 11, 2009 23:15 |  #5

A related question: I have one 580 EX II and am considering a second for wireless off camera shooting. Will I be able to control exposure on the on-camera/master Speedlite for fill light as well as control exposure on the off-camera/slave flash? If not, wouldn't I be better off getting the ST E2 Transmitter and saving myself a couple hundred dollars. Any guidance is appreciated.


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m3rdpwr
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Sep 12, 2009 09:08 |  #6

wmcy wrote in post #8628952 (external link)
A related question: I have one 580 EX II and am considering a second for wireless off camera shooting. Will I be able to control exposure on the on-camera/master Speedlite for fill light as well as control exposure on the off-camera/slave flash? If not, wouldn't I be better off getting the ST E2 Transmitter and saving myself a couple hundred dollars. Any guidance is appreciated.

I would opt for the second 580EX.

It gives you a second light where as the ST-E2 is just a transmitter.
Perhaps you can even hunt down a 550EX for the slave for some cheaper cash if you're looking to save.

And yes, you can control the Speedlite's as you wish either automatically via ratio's or manual control both via E-TTL...

-Mario


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wmcy
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Sep 12, 2009 23:01 |  #7

Thank you, Mario. I appreciate the advice.


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PacAce
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Sep 20, 2009 09:59 |  #8

jdfotos wrote in post #8623551 (external link)
Sorry to hijack your thread, but was hoping you can answer a question about the 580 for me... can I fire it off camera, using my studio flashes? (I want to use one as a third light)
Or do I need other expensive remote equipment? I already have a wireless trigger for my studio flashes. Thanks for any help!

The 580EX, by itself, can't be triggered off camera by a studio strobe. However, you can connect an inexpensive EX-compatible optical triggering device to the 580EX so that a studio strobe can trigger it as described in the following post:

https://photography-on-the.net …php?p=8675332&p​ostcount=7


...Leo

  
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jdfotos
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Sep 29, 2009 03:57 |  #9

PacAce wrote in post #8675730 (external link)
The 580EX, by itself, can't be triggered off camera by a studio strobe. However, you can connect an inexpensive EX-compatible optical triggering device to the 580EX so that a studio strobe can trigger it as described in the following post:

https://photography-on-the.net …php?p=8675332&p​ostcount=7

Many thanks PacAce.


EOS 7D Gripped / EOS 400D Gripped / 17-40L F4 / 70-200L IS USM F2.8 / Sigma 24-70 2.8 HSM / 50mm F1.8 / 580EXii / Some other flash stuff
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580EXII Remote Question
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