Just ordered some Cybersyncs... Quick question.

I just ordered some Cybersyncs (CST and CSRB+) to use with my 40D and 580EX II. I also have a 430EX and I'm hoping that the 580EX II (that will be off camera and on a Bogen Nano 001 with umbrella) can trigger the 430EX as a background light. Am I missing anything? To my knowledge, I don't need any adaptors, but let me know if I'm wrong.

If you are going to be triggering the 430EX with the 580EX II which is off camera and you expect to be using other strobes at the same time, the 430EX is not going to fire. It'll only fire if no other strobe or non-EX flash fires. That's because the other flashes would interfere with the master-slave communications between the 580EX and the 430EX.

BTW, how were you going to trigger the 580EX off camera? You'd probably have to do the same with the 430EX in order to use it also. Cheapest option would be to use an optical slave triggering device that's compatible with the EX flash.

Those would be the only two strobes. As far as triggering the 580 off camera, that's what the Cybersyncs take care of, right???

If I were to make a flowchart it would look something like this:
40D with Cybersync CST --> triggers 580EX II with Cybersync CSRB+ --> triggers 430EX optically.

Would that work? Or would I need another CSRB+ and PC adaptor for my 430EX?

mhthomps wrote in post #7444926
Those would be the only two strobes. As far as triggering the 580 off camera, that's what the Cybersyncs take care of, right???

If I were to make a flowchart it would look something like this:
40D with Cybersync CST --> triggers 580EX II with Cybersync CSRB+ --> triggers 430EX optically.

Would that work? Or would I need another CSRB+ and PC adaptor for my 430EX?

OK, in that case, that'll work, as long as there are no non-EX flashes or strobes involved. You'll also need to drop your shutter speed to 1/125 or slower to avoid syncing problems (dark bar along one edge of the frame).

Personally I would buy the other CSRB. There may be times that the built in optics may not work reliably.

Mark1 wrote in post #7444952
Personally I would buy the other CSRB. There may be times that the built in optics may not work reliably.

that was kind of the plan, but i've never used the radio remotes and I wanted to get comfortable with two first. it's all relative, but the cybersyncs are so much less expenseive than the PWs. I'm pretty pumped about getting them.

There is nothing to get comfortable with. They are very easy to use. Plug then in, turn them on , and shoot. You can have them mastered in 3 minutes. Now the flashes off camera, that is the hard part. Knowing which one to make the adjustment to, that is the tricky part. But dont limit your self now if you plan on getting the second reciever anyway.

Good point. I just called and they added another CSRB+ to the order. What's with the Vivitar flashes? I read that they are very affordable. What's the model number that people like for the price?

The Vivitars are durable and decient on power. And the price is pretty good. I dont have any, but have considered them a lot. the 283HV I believe is the model that is most popular.

I don't understand the above discussion. Once the 580EXII is off-camera and triggered by a radio trigger, then it is no longer acting as a master nor in ETTL mode because there is no communication back to the camera body. Thus it cannot trigger the 430EX. The 430EX will need its own triggering device and the additional CSRB will do that.

40Dude6aedyk wrote in post #7445754
I don't understand the above discussion. Once the 580EXII is off-camera and triggered by a radio trigger, then it is no longer acting as a master nor in ETTL mode because there is no communication back to the camera body. Thus it cannot trigger the 430EX. The 430EX will need its own triggering device and the additional CSRB will do that.

thats correct!

40Dude6aedyk wrote in post #7445754
I don't understand the above discussion. Once the 580EXII is off-camera and triggered by a radio trigger, then it is no longer acting as a master nor in ETTL mode because there is no communication back to the camera body. Thus it cannot trigger the 430EX. The 430EX will need its own triggering device and the additional CSRB will do that.

You can set the 580EX II to manual master mode. It will still be able to control another EX flash that can be set to manual mode, like the 430EX or another 580EX. There is no need for the master to communicate with the body if the master is set to manual mode.

Best thing for you to do is to try it out yourself before you say that it can't be done.

PacAce wrote in post #7444948
OK, in that case, that'll work, as long as there are no non-EX flashes or strobes involved. You'll also need to drop your shutter speed to 1/125 or slower to avoid syncing problems (dark bar along one edge of the frame).

BTW, I also forgot to mention that you'll need a hotshoe to PC adapter because you won't be able to use the PC port that's built into the 580EX II flash with your setup.

jeromego wrote in post #7445783
thats correct!

Unfortunately, no, it's not.

OK, so here's what I have coming in the mail:
Two CSBR+ (Receivers)
One CST (Transmitter)
One Hotshoe Adapter for the 430EX

Here's what I already have:
40D
430EX
580EX II

I was going to use the sync cord to go from receiver 1 to 580EX II existing input on the side

Then use the hotshoe adapter on the 430EX and go from receiver 2 to the hotshoe adaptor.

On the 40D, go from hotshoe to sync terminal on the side.

Will this work?