gray card - 12 or 18%?

Started Jan 12, 2011 | Discussions thread
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EdW66 Forum Member • Posts: 80
gray card - 12 or 18%?

I've been using a gray card from the back of Scott Kelby's lightroon 3 card. It does a reasonable job, but I find skin tones look a little cool and slightly toward green when using my strobes.

I've been looking at the pop up gray cards from lastolite and notice they have introduced a 12% gray card (ezybalance) in addition to the 18 percent. I understand that the 12% moves the midtones closer to the middle of the histogram, but what does this mean in real terms? does this effect the overall WB, or just the exposure? and is one better for one brand of camera than the other? (I use a Nikon D700)
Thanks in advance!

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