Confused on setting black point in Camera Raw 7

Hi,
I just upgraded to CS6. I was wondering how the new Blacks slider in Camera Raw 7 correlates to the same in the older version. The slider in CS5 went left to right from 0 to 100. The new slider defaults in the center and goes from -100 to +100. I never seemed to have a problem setting the black clipping point in the old version. In the new version I'm not sure if I'm getting it right. Any advice would be appreciated.
Kindest regards

Once you have some contrast added (if it's an underly contrasty shot), or some contrast removed (if it's an overly contrasty shot), then simply move the blacks slider left until you have the desired amount of black clipping. You can also move the blacks slider right if you need more light in the pic, and PV2012 will keep the blacks fairly-well seated (if its a full dynamic range shot), or it will let the black point slide up more (if original tonal distribution was not occupying whole histogram). But consider, before +blacks, whether +exposure (and maybe +shadows/-highlights) wouldn't do ya better. Note: +blacks will reduce contrast, so sometimes if you opt for +blacks you need +contrast (and/or +clarity) to go with it. Likewise, -blacks increases contrast, so you may need some -contrast to go with it (and you may find you need less clarity if you have blacks plenty-well seated).
Legend:
'+' = positive (right)
'-' = negative (left)
"plenty-well seated" = clipped enough but not too much .
"fairly-well seated" = not unclipped too much .
Clear as mud? ,
Rob

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ACR doesn’t work that way. There is an eyedropper for the overall white-balance that you can set by clicking on a relatively bright, neutral area, but there aren’t black and white-point eyedroppers. But, what is clipped black or white is determined by the output colorspace you have set at the bottom and you can get some idea of what will be clipped black and white by turning on the clipping indicators and watching for the areas you’d be eye-droppering on (the black and white patches in your grayscale) to start showing the clipping color overlay for black and white, but any further toning adjustments will move data in and out of what is darker than black and lighter than white so what is clipped for output will change as you fiddle with the various toning sliders.
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When I set black point on windows, the image switches between blank and full image, why?

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I set black point with alt button down while I move sllider. When black
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Had you specified you're on Windows, I wouldn't even have replied. I don't do windows.
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http://forums.adobe.com/thread/419981?tstart=0
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Now I'm out of here.

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Dear friends,
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I am having the same problem, although its now Camera Raw 7 - where can you set the white, mid, and black points in Camera Raw with the eyedropper tool. It seems you have to create a new psd file in Photoshop to do this, which does not make much sense since it is a basic levels adjustment. I am batch editing a bunch of CR2 files, and I just need to select the black, mid and white points on a grayscale that I've shot in the images - is there a way to do this in Camera Raw 7? Thanks!!

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"You are going to send JAO into cardiac arrest. Could you just this once; TRUST what he is saying. It is a simple concept, maybe to simple for you to under stand."
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Confused on setting black point in Camera Raw 7

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