Camera Raw: Severe Chromatic Aberration on DJI DNG with Sigma Lens

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Venting first ... For last 2 weeks I'm trying to reach somebody competent with Adobe payroll to answer my question. Forum didn't offer any help, 3 hrs long chat with 2 Adobe reps ended with suggestion to use wishform (?) feature, which is not accessible and I landed here. The Adobe castle seem to be so high in clouds and behind a countless password-ed walls ... End of venting.

OK, the question is: why DNG stills produced by popular DJI Zenmuse X5S camera with Sigma 56mm F1.4 DC DN lens are appearing corrupted in Adobe software? All other compatible lenses are delivering readable RAW files, but not Sigma. The sample is in Cloud (https://adobe.ly/2yYRmNm), the case # ADB-12544561-L9YS. All software is subscribed and up to date.
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Matthew

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Posted 3 months ago

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Rikk Flohr, Official Rep

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I am using a Mac 10.14.6.

I have no issue opening the provided file in Adobe Camera Raw 12.2.1 on my test Macbook. 
The file will also import in Lightroom Desktop 3.2.1 
The file will also import in Lightroom Classic 9.2.1 

In all three applications there is no evidence of corruption. The file will edit and export on all three applications. 

Is that what Support offered as well? (Note: I am unable to see this Case Number at this time)


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Todd Shaner, Champion

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No issues opening the file in LR or ACR on my Windows 10 system.
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Matthew

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I should be more specific, my fault. Yes, the file is readable, opening in all Adobe Camera Raw related apps (iMac, Catalina 10.15.3). But zoom in, please ... Do you see what I see? This lens (Sigma 56mm) mounted on other MFT cameras delivers DNG files properly displayed by Adobe software. Interestingly Premiere Pro media browser is reporting corrupted file, but DaVinci Resolve imports it into timeline with no problem whatsoever. Rawterapee app also displays image properly. It is apparent that a combination of DJI Zenmuse X5S camera and Sigma lenses is not supported by Adobe Camera Raw ... 


(Edited)
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Rikk Flohr, Official Rep

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It looks like you are describing the Chromatic Aberration (Color Fringing)

From Chris in Camera Raw engineering:

"it seems to me that the baked-in WarpRectilinear opcode is applied incorrectly. The opcode corrects for both distortion and chromatic aberration, so it's likely the distortion correction is off center as well. When I strip it out of the file, it looks fine. I can also manually apply the external LCP to correct for the absence of the opcode (distortion correction), and check the Remove chromatic aberration checkbox to remove any CA remaining.So, in the short term, the customer can (at their own risk, and after backing up their files) strip the opcode by doing the following:

exiftool -opcodelist3= <path to the DNG>"

"They should also contact DJI an report the issue with the opcode. We've seen this sort of issue before, though I don't recall if it was this specific DJI model. It's possible that DJI has fixed this and the customer just needs to update firmware."

I hope this helps you. 
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Matthew

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Yep, apparently that's the culprit. Although I didn't mess with PS script, the key word WARP made me thinking ... DJI Go 4 app is remotely controlling all Zenmuse X5S camera settings, where Dewarp toggle switch is hidden deep within ... video setup:



Although this feature was never scientifically explained by DJI, I would guess it is applying lens distortion correction when recording H.264/265 video. Why it is affecting DNG stills as well is beyond my understanding, but it does. At least with Sigma lenses. Long story short, once switched off ... kaboom, the problem is gone! Not the slightest trace of fringing or absurd chromatic aberration whatsoever ...

Thank you Rikk and Chris, Adobe rulez (despite my initial rage after fruitless chat with ... oh, well) ...