I’m using PL via the Lightroom plugin: transfer RAW files from LR to PL then reimport the results as DNG files. Back in Lightroom the development settings (if any) of the original RAW file get transferred to the DNG and both images look similar, of course except for the edits done in PL.
For whatever reason this does not work for images taken at ISO 125 and ISO 160. When doing the round-trip LR-PL-LR with such images, the DNG ends up ~1 stop brighter in Lightroom compared to the original RAW.
As an illustration see below a side-by-side comparison for two RAW files with their DNG counterparts. The DNG file in case of ISO 125 is way too bright.
This issue has been happening since PL5 and it is still the same in PL8. Is it known?
I’m currently using an Olympus OM-1 but it was the same with E-M1 Mark III.
If I can help to pinpoint the root cause by eg. providing the image files etc please let me know.
you can share a raw file and somebody can check if, for example, DNG tags (lack or wrong values for something like 0xC62A Baseline Exposure ) for files with nominal ISO values below “base” ISO 200 are an issue…
This includes ORF (Olympus RAW), DNG, xmp (LR dev settings) and dop (PL dev settings).
Please note, that the preview image in P6038162_DxO.dng is not too bright. The boost in brightness happens once the image is opened in Lightroom (or Photoshop).
DxO PL code does not insert a tag with the value that Adobe code expects
DNG from PL has 0xc62a BaselineExposure : 0.37
DNG from Adobe DNG converter has 0xc62a BaselineExposure : -0.79
file a bug report with DxO
PS: when Adobe code in ACR or LR converts ORF it will apply -0.79 EV brightness correction ( which is clearly shown when we use Adobe DNG converter to convert ORF to DNG ) … when Adobe code in ACR or LR receives DNG from DxO PL it sees a tag instructing it to instead apply +0.37 EV brightness correction and so it does
