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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 30 Jul 2010 (Friday) 17:39
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Limits for 430EX II and 580EX II to overpower sun?

 
lewdog
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Location: N of Seattle
     
Jul 30, 2010 17:39 |  #1

I've been searching quite a lot lately in an effort to understand what the limits are for the 430 and 580 to overpower sun/bright afternoon ambient. I've come across tons of posts where the mathematics are broken down-really cool, academic stuff that I respect, but doesn't really help me visualize what the reality is. I know bigger strobes would do a better job, but really don't want to go that way due to portability/reality considerations.

What are the limits of these two flashes as far as overpowering the sun/daylight ambient goes? I'm also sort of wondering just how much small softboxes (like my 6" x 9" on-flash softbox) or something like a 40" umbrella would drop the output.

I think the best responses would be pictures at full power for these two flashes with the ambient dropped as far down as possible.


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Zeiss ZE: 21/2.8 50/2 100/2
Canon L: 35/1.4 85/1.2 135/2 70-200/4IS
3x430 EXII and various small studio equipment
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int2str
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Jul 30, 2010 17:46 |  #2

This was shot with a bare 580 EX II triggered & supported by another 580 EX II on camera. I used ETTL and high-speed sync here (1/1000th shutter speed).This is at about the worst light of the day in the early afternoon:

IMAGE: http://lh3.ggpht.com/_uFrS5yCiGps/S9yQ1HDOwuI/AAAAAAAAPn4/uuUREI5rzlE/s800/IMG_1700.JPG

This is with a single 580 EX II in a 43" shoot-through umbrella. I think that was near full power...

IMAGE: http://photos.ironcreek.net/img/s9/v15/p761142148-5.jpg



  
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Tawcan
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Jul 30, 2010 18:58 |  #3

It can be done without using HSS or Hypersync but you're somewhat limited to how far the model can stand.

IMAGE: http://farm5.static.flickr.com/4069/4572488951_0feae7f52e_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/tawcan/45724889​51  (external link)
F14 1/250 ISO100
Went above my 5D's sync speed a little to keyshift about 2.5 stops. This was done by combining a 580eXII and 430EXII into a 43" shoot through umbrella.

IMAGE: http://farm5.static.flickr.com/4046/4669448332_64ff78ea14_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/tawcan/46694483​32  (external link)
580EXII + 430EXII into a shoot through umbrella camera left, triggered via Cybersync. Keyshifted by ~2 stops

IMAGE: http://farm5.static.flickr.com/4080/4806370233_db7da96a3c_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/tawcan/48063702​33  (external link)
Another way is to use a ND filter.

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Limits for 430EX II and 580EX II to overpower sun?
FORUMS General Gear Talk Flash and Studio Lighting 
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