D700 vs Df: same exposure settings but 0.9 stops file exposure difference

Started Dec 24, 2013 | Discussions thread
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exdeejjjaaaa
exdeejjjaaaa Veteran Member • Posts: 7,903
Re: D700 vs Df: same exposure settings but 0.9 stops file exposure difference
1

Iliah Borg wrote:

I do not understand what is baseline exposure compensation.

When you open the raw file in ACR it adds some exposure compensation behind the scenes. The slider is at zero, and you do not see it. In case of D700 half a stop is added, in case of Df - 0.25 of a stop. The difference between brightening is those 0.25 of a stop you observed in your last experiment.

nowadays a hidden exposure compensation in Adobe's products is a sum of what is hardcoded in ACR/LR code (tag "BaselineExposure") for a particular model and what is coded in particular .dcp camera profile (tag "BaselineExposureOffset")... so sum of these 2 tags... "BaselineExposure" tag might be different for different ISOs (to account for fake ISOs for example) and "BaselineExposureOffset" might be different for various OEM profiles for a given camera model (between Adobe Standard and Camera emulating profiles, for example like for D800).

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