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Yellow dogs #32893
12/14/10 07:43 AM
12/14/10 07:43 AM
Joined: Jul 2009
Connecticut
Sunstruck Offline OP
Old hand
Sunstruck  Offline OP
Old hand

Joined: Jul 2009
Connecticut
Up till now, all my shots have been with just one strobe, and AB800. Yesterday, my other 2 AB800's came in, so I went into the studio to play.

I have main strobe with 32x40 softbox set at F8 approx 45° camera left, about 3' away from the dogs. Second strobe is set at F5.6 approx. 3' away once again at approx 45° angle and a 24x36 softbox. Third strobe I have a diffuser on, set behind the dogs lighting the backdrop around 1/16th. power. I did not use a light meter on this one, I just took some shots and lowered the setting until the backdrop was lit enough to prevent shadows and brighten it a little.






According to both my camera and the lightmeter, these are properly exposed. So, why are my dogs yellow looking? They come out nice and bright with one strobe, so I am thinking it is a lighting issue.

If I increase the power, it just blows their fur out without making them white.

Thanks!


Penny J. Wills
[color:"#08c3c5"]www.pennyjwillsphotography.com[/color]
Re: Yellow dogs [Re: Sunstruck] #32894
12/14/10 09:42 AM
12/14/10 09:42 AM
Joined: Mar 2005
Florida
Jim Garvie Offline
Addict
Jim Garvie  Offline
Addict

Joined: Mar 2005
Florida
Exposure and color temperature of the strobes are two different things. I've not noticed that kind of color shift in my ABs when I dial them down but it can happen. If you're shooting RAW, just click on the dogs in ACR with the eye-dropper tool and that should bring them back to pure white or set the color temp to 5000 +/- depending on your other ACR settings.

Jim


Jim Garvie
www.jagphoto.biz
Re: Yellow dogs [Re: Jim Garvie] #32895
12/14/10 10:08 AM
12/14/10 10:08 AM
Joined: Jul 2009
Connecticut
Sunstruck Offline OP
Old hand
Sunstruck  Offline OP
Old hand

Joined: Jul 2009
Connecticut
Thanks Jim. I did use a gray card. I'll double check my settings again. I just thought it was odd.


Penny J. Wills
[color:"#08c3c5"]www.pennyjwillsphotography.com[/color]
Re: Yellow dogs [Re: Sunstruck] #32896
12/14/10 11:51 AM
12/14/10 11:51 AM
Joined: Mar 2005
Florida
Jim Garvie Offline
Addict
Jim Garvie  Offline
Addict

Joined: Mar 2005
Florida
One of the nice things about shooting white or black dogs is that you have a built-in neutral or gray card in the subjects themselves. I'm not always able to see subtle color shifts when looking at a gray card but I can always tell if my Rotties' coats are a little too brown or too blue .

Jim


Jim Garvie
www.jagphoto.biz
Re: Yellow dogs [Re: Sunstruck] #32897
12/14/10 11:56 AM
12/14/10 11:56 AM
Joined: Nov 2008
Kansas
psmith Offline
Pooh-Bah
psmith  Offline
Pooh-Bah

Joined: Nov 2008
Kansas
Penny, it looks like a color temperature issue to me. And there are many things that could cause it. Since it happened when you added new light sources that is the first place to look.

If your old AB800 is more than 2 or 3 years old it may have a different UV rated flashtube. You could shoot each light bare to a Colorchecker to compare. In addition to introducing new light sources you have also introduced new modifiers. I'll bet the softboxes do not match in age/material/manufacturer/color temperature. The diffusion fabrics age, and maybe at different rates depending on usage (hot lights and hot modeling lights can affect them).

It is a good idea to label your lights so you'll be able to identify those two new lights and make it a point to use those as the two front lights where color temperature is most critical.

Re: Yellow dogs [Re: psmith] #32898
12/14/10 12:58 PM
12/14/10 12:58 PM
Joined: Jul 2009
Connecticut
Sunstruck Offline OP
Old hand
Sunstruck  Offline OP
Old hand

Joined: Jul 2009
Connecticut
Thanks Jim! That is clever! Using the dogs themselves.
That is wonderful information Preston! I'll check when I get home today.


Penny J. Wills
[color:"#08c3c5"]www.pennyjwillsphotography.com[/color]
Re: Yellow dogs [Re: Sunstruck] #32899
12/17/10 08:09 PM
12/17/10 08:09 PM
Joined: Oct 2010
Massachusetts, USA
L
Lesley Offline
Venturer
Lesley  Offline
Venturer
L

Joined: Oct 2010
Massachusetts, USA
I can't speak to studio lighting... but I do lnow when shooting white dogs or snow I dial in +1 in exposure compensation so my whites are white and not gray. Don't know if this would work in the studio situation.

Re: Yellow dogs [Re: Lesley] #32900
12/18/10 09:17 AM
12/18/10 09:17 AM
Joined: Jul 2009
Connecticut
Sunstruck Offline OP
Old hand
Sunstruck  Offline OP
Old hand

Joined: Jul 2009
Connecticut
Thanks Lesley! Preston was right, I moved the 2 newer lights to the front, reshot using the same settings in the camera, and I have white dogs again. What a difference.


Penny J. Wills
[color:"#08c3c5"]www.pennyjwillsphotography.com[/color]
Re: Yellow dogs [Re: Sunstruck] #32901
12/23/10 03:25 AM
12/23/10 03:25 AM
Joined: Feb 2006
Donner Summit, CA
glamson Offline
Veteran
glamson  Offline
Veteran

Joined: Feb 2006
Donner Summit, CA
I seem to be having a similar problem. I'm using two stobes with silver umbrellas and no matter what I do I just can't get the yellow color out of these two cuties. Anybody have any ideas. TIC


Re: Yellow dogs [Re: glamson] #32902
12/23/10 10:06 AM
12/23/10 10:06 AM
Joined: May 2008
Virginia, USA
Jim Poor Offline
Addict
Jim Poor  Offline
Addict

Joined: May 2008
Virginia, USA
BW conversion? What a cute puppy!

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