Question about Canon SPEEDLITE 580EX TTL Flash
The display flashes constantly .... The ready lite shows... It'll fire only once... Then scenario starts all over again ... Switching to new batteries has no effect
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Posted on Jan 02, 2017
SOURCE: Amperege of 580 EX-II
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.
Posted on Jul 23, 2008
Trust me I have this flash and I LOVE IT, I wouldn't trade it for the world.
Sounds like you have a short somewhere, where did you buy it? Remember Canon gives you a full one year warranty BUT it must be the Canon USA and not Japan model....THAT is where it hurts! Read the fine print, it may be cheaper but that does not mean it will be better.
Even if you have lost your receipt Canon will have you on file, because you registered your Canon product, right??
If you need it fixed, I have the guy for you, but I am located in the San Francisco Bay Area. I am sure you can call him on the phone and he can see if it's worth you having it shipped.
But FIRST CALL CANON they are awesome, and want you happy! And only buy B&H Photo.com they are amazing and NO SALES TAX for online
Keep us posted!
Posted on Oct 21, 2009
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