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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 18 Sep 2010 (Saturday) 22:18
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"effective" size of softbox

 
ccp900
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Sep 18, 2010 22:18 |  #1

hi guys

when i use a softbox to shoot, i almost always bring the level of the strobe above the eyes and i feather so that the hotpot goes past the front of the model and doesnt result to hotspots on the subject.

doing it this way half of the softbox is effectively "wasted" since it is way above the subject.

how do you use yours?

sometimes i think it would have been better to just use lite panels and barndoors.


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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charlieharper
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Sep 19, 2010 04:41 |  #2

I've been having a lot of success lately with the softbox at the side of the model, but "forward", so that (say) the models face is in line with the "rearmost" edge of the softbox, thus having "all" of the softbox in front of the model ....



I just want to take nice photographs of people.
My SmugMug pages. (external link)

  
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ccp900
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Sep 19, 2010 05:05 |  #3

hi austen, yep i also like to feather my softbox...so in your configuration the strobe head is around the torso region then? (depends on box size, if its larger then around stomach region)


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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charlieharper
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Sep 19, 2010 05:21 |  #4

Yes, My softbox is 70cm * 100cm, and I've been configuring it so that it's 100cm "high", with the top of it somewhat "just" above the models head ............

I've been using my Softlighter above and next to me as the fill light ...........

With results something like this .........

IMAGE: http://adelaide-shooter.smugmug.com/Models/Louise-1/MG51021024/1013394597_Sa3Gy-XL.jpg

HTH


I just want to take nice photographs of people.
My SmugMug pages. (external link)

  
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ccp900
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Sep 19, 2010 05:28 |  #5

i see....i just bought a 100x140 yesterday...they forgot to package the darn speedring though so i have to wait for tom to get it delivered hehehehe.....

i was hoping to get a 140x200 but using it on a 400ws and feathering might have to use f4...ill wait till november when i get a set of 600ws heads before getting it....

ill put up a pic when i get my speedring.


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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george ­ m ­ w
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Sep 19, 2010 07:22 |  #6

when i use a softbox to shoot, i almost always bring the level of the strobe above the eyes and i feather so that the hotpot goes past the front of the model and doesnt result to hotspots on the subject.

Are you sure you have a "hotspot" on the face of the softbox ? Have you measured it with a meter to see how even it is ? And if you don't mind me asking, what brand is it ?


regards, george w

"It's also obvious that people determined to solve user error with more expensive equipment will graduate to expensive user error."
Dave N.

  
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ccp900
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Sep 19, 2010 07:35 |  #7

its a rimelite softbox....middle is around f45, edge is around f36...i put the lightmeter up against the fabric when i measured hehe...its not a big big difference though.


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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charlieharper
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Sep 19, 2010 20:14 |  #8

Just as a matter of interest, This is something I found that is not-unrelated to this thread.

http://mjranum-stock.deviantart.com …raphic-Lighting-118703072 (external link)



I just want to take nice photographs of people.
My SmugMug pages. (external link)

  
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eduardofrances
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Sep 19, 2010 20:33 as a reply to  @ charlieharper's post |  #9

I use a 48x36 inches photoflex litedome q39, a 24x36 inches softbox (came as a kit with my visicos) and a 24x24 inches (crappy small softbox from interfit) softbox too, I use them in a variety of ways and haven´t find myself too bothered by the hotspots:

These were shot with the 48x36 inches softbox:
http://www.flickr.com …duardofrances/3​776012816/ (external link)
http://www.flickr.com …duardofrances/4​740132450/ (external link)
http://www.flickr.com …duardofrances/3​923153601/ (external link)
http://www.flickr.com …duardofrances/3​721305892/ (external link)
http://www.modelmayhem​.com/portfolio/pic/132​04589 (external link)

This was shot with the 24x36 it produces a hot spot but I take advantage of it because if metered to the hotspot it produces a nice and really subtle fall off that I quite like:
http://www.flickr.com …duardofrances/4​541029368/ (external link)

These were shot with the 24x24 softbox
http://www.flickr.com …duardofrances/3​813347384/ (external link)
http://www.modelmayhem​.com/portfolio/pic/131​92803 (external link)

They were used in different ways with not much regard to hot spot problems.

If you are shooting people the problem could be skin oil or sweat which will produce a hot spot hence the need of the talents of a Makeup artist or at least oil absorbing tissue papers (sold in drugstores). If not then the problem is the softbox itself, what softbox (brand model) are you using?


http://flickr.com/phot​os/eduardofrances/ (external link) :D

  
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charlieharper
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Sep 19, 2010 21:00 |  #10

Stunning photographs, Thanks for sharing these with us !!

eduardofrances wrote in post #10939383 (external link)
:
These were shot with the 24x24 softbox

http://www.modelmayhem​.com/portfolio/pic/131​92803 (external link)
:

Did you use your Softlighter for fill on this one too ?

Thanks.



I just want to take nice photographs of people.
My SmugMug pages. (external link)

  
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eduardofrances
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Sep 19, 2010 22:02 |  #11

charlieharper wrote in post #10939529 (external link)
Stunning photographs, Thanks for sharing these with us !!


Did you use your Softlighter for fill on this one too ?

Thanks.

You are welcome :) Nop no softlighter there buddy for that photo there´s a big silver reflector at her chest level.


http://flickr.com/phot​os/eduardofrances/ (external link) :D

  
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ccp900
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Sep 19, 2010 23:17 |  #12

thanks eduardo....but when you use your softbox do you at least point the strobe head on her face angling down? or do you point the strobe head much lower (ex. legs) and making inverse square law work for you?


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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ccp900
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Sep 20, 2010 07:45 |  #13

LOL!! i setup the softbox but with all the furniture i managed to just squeeze in the softbox as main and a socked BD as a kicker....i had a hell of a time controlling spill light! LOL....light was just going everywhere....time to wait for those 4x8x1/2 foamboards i ordered for friday....


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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"effective" size of softbox
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