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NYNC
NYNC
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December 15, 2023

P: Profile for Canon RF 24- 105mm F2.8 L IS USM Z has edge artifacts

  • December 15, 2023
  • 31 replies
  • 7482 views

Just aquired newly released Canon RF24-105mm F2.8 IS USM Z lens. A profile for correction for this lens is on the list of lenses added in December 2023.  Applying the Distortion Correction profile in LR Classic and Photoshop Camera Raw produces edge artifact instead of improving distortion. At the edges, the image shows a pattern of stripes perpendicular to the edge and extending about 5% inward. This artifact occurs in LR 13.1 and Photoshop 25.3.1 with Camera Raw 16.1. It disappears if I deselect Profile Corrections. It is not present when I view the image with other software like the Windows photo viewer FastPictureViewer or in Canon's Digital Photo Professional, so it's specific to LR Classic or Camera Raw 16.1 with Distortion Correction turned on and not due to a problem with the CR3 raw files. If I force use of a profile for a different lens, the artifact disappears. That is perhaps a useful verification that the native profile is bad, but using a mismatched profile isn't going to fix distortion. Turning off GPU acceleration has no effect. See attached JPG screenshot. I'll post in Windows forum but suspect the issue is not limited to Windows.

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    Rikk Flohr_Photography
    Community Manager
    Rikk Flohr_PhotographyCommunity Manager
    Community Manager
    December 15, 2023

    Is it possible for you to share a sample raw file with us that exhibits the issue?

    Rikk Flohr: Adobe Photography Org
    NYNC
    NYNCAuthor
    Known Participant
    December 15, 2023

    Thanks for your quick reply. I am happy to do so, however, the website won't accept the file. I first tried to upload a file shot with the Canon EOS R5, but it was rejected because its size exceeded Adobe's website limit of 47 KB. Then, I tried to upload a file shot on the Canon EOS R3, which has a lower resolution sensor and smaller files. The size was OK, but the website rejected that one, saying that there was a mismatch between the file extension (CR3/Raw File) and its contents. It was just a RAW file; I can't account for that error message. Please let me know if there is some other way to get the file to you. 

     

    To complete the post, if I can somehow get the file to you and you open it in Develop Mode, I suggest you add lens corrections, and then view full screen in Library. The artifact will be plainly seen, particularly along the left edge. Having now seen the problem with CR3 files from both the R5 and the R3, it has to be the lens and the lens profile not just a one off corrupt file or a one camera issue.

    dj_paige
    dj_paige
    Legend
    December 15, 2023

    You can put the raw photo on Dropbox or any similar service; and then provide the link in your reply.

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