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Old 6th of August 2013 (Tue)   #31
Gaarryy
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Default Re: External power for a Canon Speedlite 580EX II???

Just a thought for the OP.
A different direction to think about. Since you are inside the house and will be plugging it in to an outlet. Why not look at a smaller studio strobe? say an AB400 or 800. lots more power at the top end, and if you are shooting lower power good recycle times. Since you did not say if you are using the ETTL features of the flash, but it might be a fun way to go.
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Old 8th of August 2013 (Thu)   #32
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Default Re: External power for a Canon Speedlite 580EX II???

It's been 2 1/2 yrs since the original post and he never replied one way or another...not even a thank you to all who offered help and advice.
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Old 9th of August 2013 (Fri)   #33
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Default Re: External power for a Canon Speedlite 580EX II???

Quote:
Originally Posted by alyson View Post
thanks for the info rob! so what is the speedfire exactly? a converter or a battery pack
Canon high voltage input basically is a 330V DC current,
if we want to build an adaptor with the same output and using the same connector,
I think it is possible and easy

Powering Quantum flash is a bit different,
there are high voltage and low voltage, I am not sure with the low voltage,
My guess is around 8V DC, actually, it is similar to camera battery power,
which is around 7,2V DC

I think, they do have standard for powering the flash and the camera,
what makes it different is the connector and Amps
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Old 12th of August 2013 (Mon)   #34
Wilt
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Default Re: External power for a Canon Speedlite 580EX II???

Quantum Instruments is right now offering factory refurbished Quantum Turbo battery (original, not 2+2 or SC, etc. which came out later) for $180
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Old 13th of August 2013 (Tue)   #35
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Default Re: External power for a Canon Speedlite 580EX II???

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Originally Posted by Wilt View Post
Quantum Instruments is right now offering factory refurbished Quantum Turbo battery (original, not 2+2 or SC, etc. which came out later) for $180
Remember that the turbo is a gel cell SLA battery. There are special considerations required regarding charging.
For $20 more one can get a Cheetah Light 4500 which probably will deliver more pops and is a much better battery technology. It is also smaller and lighter.
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Old 13th of August 2013 (Tue)   #36
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Default Re: External power for a Canon Speedlite 580EX II???

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Remember that the turbo is a gel cell SLA battery. There are special considerations required regarding charging.
For $20 more one can get a Cheetah Light 4500 which probably will deliver more pops and is a much better battery technology. It is also smaller and lighter.
Yeah, sealed lead acid has a far better ability to store electricity without self draining, like ordinary NiMH.

My original Turbo has an ordinary dumb AC adapter for a charger...the charge circuitry is built into the electronics of the Turbo.

Yes, the 4500mAh storage of the Cheetah will outdo the 2700mAh in the lead acid cell of the Turbo.

OTOH, you need to send in the Cheetah to the manufacturer to replace the batteries, while the Turbo battery refit is a do-it-yourself affair that only costs about $25 to buy the new SLA.
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Old 13th of August 2013 (Tue)   #37
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Default Re: External power for a Canon Speedlite 580EX II???

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Originally Posted by Wilt View Post
Yeah, sealed lead acid has a far better ability to store electricity without self draining, like ordinary NiMH.

My original Turbo has an ordinary dumb AC adapter for a charger...the charge circuitry is built into the electronics of the Turbo.

Yes, the 4500mAh storage of the Cheetah will outdo the 2700mAh in the lead acid cell of the Turbo.

OTOH, you need to send in the Cheetah to the manufacturer to replace the batteries, while the Turbo battery refit is a do-it-yourself affair that only costs about $25 to buy the new SLA.
Wilt, I had a couple of the old turbos. They worked but, like all lead acid batteries needed to be kept at full charge.

The newer Lithium batteries are much more user friendly in that regard. Replacement batteries are less than $100 and they are ready to use. The $25 gel cell means a DIY replacement. Getting Quantum to do it used to be about $100. May be more now.

In the end, much better use of funds to by Lithium based batteries today.
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