Question about Canon Speedlite 540EZ TTL Flash

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Canon Speedlite 580 EX II

Using the 580 as a master and the 430 EX as the slave, I cannot get the units to sync at the same time.  there is a delay with the slave.  any suggestions?

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  • Anonymous Jan 04, 2009

    same !!!

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Is your master flash set on a camera? The EX II has something that makes it have a 1 second delay when using sync mode, unless the master flash is set on the camera.

Posted on Jun 02, 2009

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Interesting Question!
The rating in milliamps is a matter of battery capacity and charging rates. The higher the better as you will get more flashes per charge as long as you have the correct charger to match the batteries’ capacity and use the correct charging times. Aside from this issue of duty cycle between charges- this has no effect on the power of the flash unit as to output. This cant burn out or damage the circuitry.

The issue here is VOLTAGE. Most AA alkaline batteries provide 1.5 volts. Most rechargeable AAs provide 1.2 volts. We are looking at a voltage differential of 1.2 volts (a 20% deficit) if 4 batteries are required. This MAY cause slower recycling times in order to attain a full charge for each shot. In SOME units that can cause a bit if overheating due to strain on the step up circuitry.

It so best to check with the manufacture or distributor of you flash unit before purchasing you rechargeable batteries and charger. If you units have a built in charging circuit this can definitely be problems if there is a mismatch in charging rates and voltage. If this is the case be sire to check your manual or with the manufacturer or distributor- there must be a list of compatible batteries.

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Here's how I did it with my Canon 430 EX II. The only other Canon flash that can act as a wireless trigger for off camera flash would be the 580 EX II and that is why I love it so much.

The only other way is Pocket Wizards or the Canon wireless thingy, which noone recommends....

Check out the NEW Pocket Wizard Mini TTi it truly does amazing things! And only 199.00!

God luck and let us know how it goes.

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if u set the 580ex on master and the 430 EX on slave it works :) u dont need STE2 for this simple task.

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