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FORUMS General Gear Talk Flash and Studio Lighting
Thread started 29 Dec 2009 (Tuesday) 09:59
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Quantum Turbo and third party battery pack for 580EXII

 
danielyamseng
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Dec 29, 2009 09:59 |  #1

If a Canon CP-e4 already shorten the recycle time, why there's a need to use Quantum Turbo?

Would Quantum turbo would have constant recycle time until the last drop of power as compare to the cp-e4 which uses the 2700maH best rechargable batteries?

If the recycle time is shorten, would shooting at 1s per shoot continously would overheated the flash?I knew if it's continously shoot at full power would, but this is like shoot 1s and another frame 1 second.

Any real statistic for canon-cp e4 recycle time using a 2700maH batteries at full power?

Anyone using a third party canon compatible battery pack?




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AlanU
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Dec 29, 2009 10:31 |  #2

I own 2x SF18 Yongnuo 8 AA battery packs. After using such a reasonably priced battery pack I find it such a valuable tool. Adding high MaH AA's is such a cheap alternative to the "turbo"

However I'd like to pick up a quantum pack one day since the Quantum T-5d-r seems to be a great flash to own.


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Bob ­ Sherwood
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Dec 29, 2009 14:57 |  #3

The TD5 with FreeXwire will take your photography to the next level, once you learn how t use it.




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PacAce
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Dec 29, 2009 16:25 |  #4

danielyamseng wrote in post #9282600external link
If a Canon CP-e4 already shorten the recycle time, why there's a need to use Quantum Turbo?

Would Quantum turbo would have constant recycle time until the last drop of power as compare to the cp-e4 which uses the 2700maH best rechargable batteries?

If the recycle time is shorten, would shooting at 1s per shoot continously would overheated the flash?I knew if it's continously shoot at full power would, but this is like shoot 1s and another frame 1 second.

Any real statistic for canon-cp e4 recycle time using a 2700maH batteries at full power?

Anyone using a third party canon compatible battery pack?

I did a quick speed test between the Canon CP-E4 with the Sanyo Eneloop batteries in it and the Quantum Turbo 2x2 battery pack (fully charged) and the speeds are pretty close if judged just by sight. However, I video taped the recycling of the flash, a 580EX in manual fired at 1/1, and checked the timecode to see exactly how long each pack took to recycle the flash. I fired the flash thrice but only calculated the speeds of the first two fires (the third was in case there was a marked difference in the calculated speed). And here are the results:

Test 1, custom function set to only use the external battery for charging the flash:

CP-E4: 1.3 sec. and 1.3 sec.
2x2: 1.0 sec. and 1.0 sec.

Test 2, custom function set so both external and internal batteries were used:

CP-E4: 1.0, 1.1 and 1.1
2x2: 1.0, 0.9 and 0.9

As the numbers show, the Turbo 2x2 has a slight edge but for all practical purposes, I think they're equally matched, especially when the internal batteries are used as well.


...Leo

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tetrode
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Dec 29, 2009 17:08 |  #5

PacAce wrote in post #9284876external link
... I video taped the recycling of the flash, a 580EX in manual fired at 1/1, and checked the timecode to see exactly how long each pack took to recycle the flash...

Wow, Leo! Checked the timecode, huh? Very clever. That's what I call leveraging technology.

As for your findings, I'd agree that there's no practical difference in recycling times between a Quantum Turbo battery and a Yongnuo SF-18 filled with freshly charged Eneloops. Both are at least as quick as I need them to be. Capacity is another issue entirely.

Dave F.




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PacAce
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Dec 29, 2009 17:35 |  #6

tetrode wrote in post #9285128 (external link)
Wow, Leo! Checked the timecode, huh? Very clever. That's what I call leveraging technology.

As for your findings, I'd agree that there's no practical difference in recycling times between a Quantum Turbo battery and a Yongnuo SF-18 filled with freshly charged Eneloops. Both are at least as quick as I need them to be. Capacity is another issue entirely.

Dave F.

I agree wholeheartedly. There the winner is the Turbo 2x2 hands down. Can't speak for the other Turbo models, though, since I have no experience with them but the standard Turbo (no suffix) should be close behind, I would imagine, based on the following chart:

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...Leo

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Wilt
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Dec 30, 2009 20:28 |  #7

Ignoring the Turbo 2x2 (which uses conventional rechargeable cells which have to be replaced every few years), the Turbo uses lead acid gel battery which has a very long life and is cheap to replace...I replaced my own after 15 years for $25. Figure how many sets of AA it would take to provide equivalent total flash capacity for a single event, and how much it costs to replace the multiple sets of eight every three years, and the cost differential of the Turbo is lessened.


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viet
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Dec 30, 2009 23:40 |  #8

Also, one Quantum will out last one set of 8-AA CP-E4 and can easily last a whole day wedding.




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PacAce
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Dec 31, 2009 07:21 |  #9

viet wrote in post #9294136external link
Also, one Quantum will out last one set of 8-AA CP-E4 and can easily last a whole day wedding.

I wouldn't necessarily make a generalized statement like that without qualifying which Quantum battery back you are referring to. ;)


...Leo

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Quantum Turbo and third party battery pack for 580EXII
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