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How do I corect this problem ? See picture
Old 08-10-2005, 05:51 PM   #1 (permalink)
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I had a catalog shoot with a white back drop last night. I had trouble the last time I did this type of a setup. The light would be to hot on the models sides. One of the big problems are the small area I have to shoot in. So with advice from a few people here I changed the setup for the shoot. This time I put panels on each side of the model to block the light that was spilling on to the models sides from the lights that lighted the back drop. I then had a soft box to light the model from the front. Doing this fixed the first problem but made a new problem when shooting a full lenth shot. Down by her feet was measured at f8 like the model while the back ground was f11. So her feet had a darker back ground. How can I fix this problem ?

This is a sample of what I am talking about.



Here is a shot of the setup.



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Re: How do I corect this problem ? See picture
Old 08-10-2005, 06:30 PM   #2 (permalink)
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How about firing a light down by her feet?
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Re: How do I corect this problem ? See picture
Old 08-10-2005, 06:36 PM   #3 (permalink)
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I have a large softbox in front of her. The model was metered from head to toe at f8. If I add another light at the bottom it will over expose her feet. I would need to meter it to f11 like the back drop to make it right but then her feet would be very hot and not at f8 like the rest of her.

Mike

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Re: How do I correct this problem ? See picture
Old 08-10-2005, 06:42 PM   #4 (permalink)
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TRY IT!

Put a small soft box aimed down by her feet and just adjust the power, the distance and the feathering.

Are you using Alien Bees?
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Re: How do I correct this problem ? See picture
Old 08-10-2005, 06:46 PM   #5 (permalink)
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I have 2 JTL mono lites and 2 Alien Bees. All I used for this shoot was 3 lights. I will give it a try and see what happens..

Mike
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Re: How do I corect this problem ? See picture
Old 08-10-2005, 07:33 PM   #6 (permalink)
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This may be wasted typing but here goes.....

If you were to cut the inside(facing the model) panels at an upward angle from the bottom
to the back wouldn't it create a spill of light at her feet.
Or possibly cut the inside bottoms at such a height that you light the floor evenly.

New problem created with standing up panels [img]/ubbthreads/images/graemlins/confused.gif[/img]

Sorry, just trying to brainstorm.

Joe [img]/ubbthreads/images/graemlins/smirk.gif[/img]
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Re: How do I correct this problem ? See picture
Old 08-10-2005, 07:57 PM   #7 (permalink)
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Mike,

I think it will be impossible to get rid of all the shadows around the feet without blowing them out. I did a shoot like this a couple of weeks ago with 2 AB's on the background and 2 AB's with Octo-boxes to light the model. As you suggest, you have to meter the model head to toe and then meter the background and floor. The floor at the models feet will always be close to the same reading as the models feet due to the proximity. In my setup (which I will try and take a picture of the next time it's out) i have the bkg lights about 6 feet from the bkg and the model standing 10 feet from the bkg. I use the AB's bkg reflectors (well worth the money) and don't require the pannels between the model and the bkg lights. Next set up a couple of white reflectors just behind the the bkg lights (but in front of the bkg) aimed 10 degrees down and slightly back towards the model. This will keep the floow fairly even without overpowering and causing spill. I usually tinker with the setup and the light meter for a few minutes getting everything just right. One other thing that can be done is to do some PS to get the floor white.

Here is the raw shot -


And here it is with some PS to clean up the floor (2 minutes of PS work).


Hope this is helpful.
Allen
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Re: How do I corect this problem ? See picture
Old 08-10-2005, 08:20 PM   #8 (permalink)
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Cut a rectangle slit down by the bottom of the panels on the side facing the model, then tape a piece of diffusion material over the hole. You can vary the amount of diffusion material over the hole to control the amount of light spill you want on at her feet. That will save you adding yet another light fixture what will crowd the set more, and most likely create some other problem you'll have to try to solve. The light you need is already there behind the panel, you just need to let out enough of it to do what you want.

This, or another solution simiar, should work, costs nothing, and will be repeatable every time you setup the panels. It will be faster then setting up another fixture, and once the cutout is made, you never have to deal with it again. Why make more work for yourself in the future if you don't have to.

Sound theory, and at least worth a try.
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Re: How do I corect this problem ? See picture
Old 08-10-2005, 08:47 PM   #9 (permalink)
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Here is how I would do it:
Plexiglass platform.
Sorry I do not have a sample, but if I had to do it I would think that I would find the solution that way.
Jose
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Re: How do I corect this problem ? See picture
Old 08-10-2005, 08:57 PM   #10 (permalink)
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Just her feet are hot? I was thinking something similar, like from head to toe was hot. All jokes aside, plexiglass is probabbly the best solution other than having a light just for her feet.

Isiaah Brink
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