Noise brought up with the Shadows slider in ACR vs. Curves in PS

Is there any difference in the amount of noise brought up when I lighten dark tones (the same amount) with the Shadows slider in ACR vs. using Curves in PS?
Thanks!

I think what you meant to say was “When the range of the brightnesses in the scene”.
But even then, it is not very practical. Not all the parts of scene need to be reproduced. Some can be plugged, while some can be clipped.
Now, if the range of brightnesses for the important part of the scene exceeds the DR of the sensor and shadows are plugged at image capture, no shadow lifting can help. In fact, such an action results in murky shadows with more visible noise and blotches.
I think your estimation of 99% is a strong hyperbole. Kodak determined that close to 8 stops is enough for most of the situations, and if they were wrong their film business would never have existed in the first place.

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I use the shadow slider to bring down the blacks, I’m watching the waveform, and when the trace gets to the 10-15ire mark, it starts moving very quickly*. What I end up getting is a bit of posterization in the shadows.
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jPo
JP Owens wrote:
any LUT (such as color space settings) that the crew may have dialed in on set, are thrown out
I thought the Primary In RED tab settings are whatever the metadata settings were when the R3D file was created... feel free to correct me on this.
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Has anyone noticed the changed behaviour of what used to be (in iPhoto 08) a useful tool? It used to brighten only shadows, now it brightens just about everything. Is there any way to get it to work the way it used to?

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for me the Highlights and Shadows sliders work like before. They increase the brightness of the shadow areas.
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Noise brought up with the Shadows slider in ACR vs. Curves in PS

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