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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 20 May 2008 (Tuesday) 14:44
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PC Sync/Flas Question

 
SurplusCorn
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May 20, 2008 14:44 |  #1

Hi all,

I just thought about this one. Is it possible to connect, for example, a 40D and 580ex II using a PC Sync cord instead of an off-shoe cord?

Thanks!


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PacAce
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May 20, 2008 15:29 |  #2

Yes, you can. However, you'll only be able to operate the flash in manual mode since ETTL isn't available via the PC sync terminal (ETTL needs all 4 dedicated pins in addition to the main sync pin found on the hotshoe to function).


...Leo

  
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Curtis ­ N
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May 20, 2008 16:04 |  #3

PacAce wrote in post #5562621 (external link)
Yes, you can. However, you'll only be able to operate the flash in manual mode...

... or "manual external flash metering" mode, a.k.a. traditional automatic mode, with C.Fn. 5-3 on the 580EX II.

But I would point out that using traditional automatic metering with an off-camera flash can be tricky. Aiming the flash unit's sensor properly is key, and it's not easy to do.

Also, to connect your 580EX II to your 40D you'll need a PC cord with a male connector on both ends.


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PacAce
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May 20, 2008 19:26 |  #4

Curtis N wrote:
=Curtis N;5562828 "manual external flash metering" mode, a.k.a. traditional automatic mode, with C.Fn. 5-3 on the 580EX II.

But I would point out that using traditional automatic metering with an off-camera flash can be tricky. Aiming the flash unit's sensor properly is key, and it's not easy to do.

Also, to connect your 580EX II to your 40D you'll need a PC cord with a male connector on both ends.

True! I forgot about the "auto" mode on the 58EX II flash.


...Leo

  
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Baddrummerboyy
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May 20, 2008 22:13 |  #5

Curtis N wrote in post #5562828 (external link)
... or "manual external flash metering" mode, a.k.a. traditional automatic mode, with C.Fn. 5-3 on the 580EX II.

But I would point out that using traditional automatic metering with an off-camera flash can be tricky. Aiming the flash unit's sensor properly is key, and it's not easy to do.

Also, to connect your 580EX II to your 40D you'll need a PC cord with a male connector on both ends.

When the 580EX II is hooked up through pc sync cable, it is possible to still use the wireless IR built in to trigger other 580ex II flash?


Current: Canon 40D w/BG-E2N, Canon 30D, Canon 10-22mm, Canon 17-55mm 2.8 IS w/EW-83J, Canon 70-200mm 2.8L IS, Canon 580EX II, Crumpler 6 Million Bag, and B+W MRC on all my glass.

  
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Curtis ­ N
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May 20, 2008 22:22 |  #6

Baddrummerboyy wrote in post #5564999 (external link)
When the 580EX II is hooked up through pc sync cable, it is possible to still use the wireless IR built in to trigger other 580ex II flash?

In order to use the 580EX II off-camera in master-manual mode, you need to connect the PC cord to the flash foot (via hotshoe adapter), not to the PC socket on the flash.

The 580EX II was not designed to work this way, but it will work if you keep your shutter speed at 1/125 or slower.


"If you're not having fun, your pictures will reflect that." - Joe McNally
Chicago area POTN events (external link)
Flash Photography 101 | The EOS Flash Bible  (external link)| Techniques for Better On-Camera Flash (external link) | How to Use Flash Outdoors| Excel-based DOF Calculator (external link)

  
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PC Sync/Flas Question
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