Adjusting exposure in ACR/PS

Explorer ,
Jul 01, 2022 Jul 01, 2022

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Hi all,

 

I accidentally overexposed a shot by about 2 stops. When adjusted in ACR using the exposure slider, I can correct it OK. However, when using an exposure adjustment layer in PS, it gives me terrible resuilts. Please see attached images. Why?  Similar issue although not as bad, if I open in PS with no ACR adjustment then use ACR filter from withi_8020604 - ACR-edit.jpg_8020604 - PS_edit.jpg_8020604 - original.jpgn PS.

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Adobe Community Professional ,
Jul 01, 2022 Jul 01, 2022

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Adjusting exposure in ACR is using the linear raw camera data where "latent" data exists for remapping.

 

In Photoshop, you have already rendered and mapped the tonal values, there is nothing to work with except what is there in 8 or 16 bpc.

 

The exposure slider in Photoshop is for 32 bpc HDR images, again where "latent" usable data may exist.

 

Perhaps these PDF whitepapers will help:

 

https://pdf4pro.com/vendor/pdfjs-1.9.426/web/viewer-dark-blue.html?file=https%3A%2F%2Fpdf4pro.com%2F...

 

https://www.adobe.com/digitalimag/pdfs/understanding_digitalrawcapture.pdf

 

 

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Explorer ,
Jul 01, 2022 Jul 01, 2022

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Thanks

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Adobe Community Professional ,
Jul 01, 2022 Jul 01, 2022

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Further, the only way to know about exposure in raw data is with a raw Histogram which ACR and LR (most raw converters) lack. Check out RawDigger or Raw Fast Viewer; both provide a true raw Histogram that actually provides real information about exposure. More here:


https://www.fastrawviewer.com/blog/mystic-exposure-triangle
https://www.fastrawviewer.com/blog/red_flowers_photography_to-see-the-real-picture
https://www.rawdigger.com/howtouse/exposure-for-raw-or-for-jpegs
https://www.rawdigger.com/howtouse/beware-histogram
https://www.rawdigger.com/howtouse/calibrate-exposure-meter-to-improve-dynamic-range


Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

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