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

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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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V

Visceral-Image

Participant

Did you even read through this thread at all? I even shared the current work around directly above your post. The pinned comment shows that Adobe is aware of the issue since December 16th and we are just waiting for them to fix it. In the meantime - click "Constrain to Crop" check box found in various locations like "CROP" "TRANSFORM" and the manual secontion of "LENS CORRECTIONS".

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davidr79950732

Participant

Is anyone else having problems with the lens profile corrections in Ligtroom for the new Canon RF 24-105 f2.8? I'm getting crazy banding (looks like colored rectangles) along the edge of the frame with the lens profile corrections turned on. It seems to affect pictures taken at the longer side of the zoom range, wide angle photos are fine. I have the latest lightroom updates.

The issue looks so blocky that I'm thinking it's a simple bug that can be fixed. I tried editing the same photos in a Adobe Raw and had no problems. The issue only appears in LR and RAW images opened into Photoshop via LR.

Here's a link to a YouTube short i created that shows the problem https://www.youtube.com/shorts/j5K4U8MDcWA

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Visceral-Image

Participant

In the interim, a solution I have found is to check the box "Constriain Crop" under the Transform tab. This will phisically crop off the problematic portion to each image, resulting in s a very slightly smaller image overall. I've found this works perfectly when applied as a batch to all images.

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NYNCAuteur

Known Participant

Profile apparently fixed in latest Camera Raw update (16.1.1), but not in LR Classic as yet. If you bypass LR & open the raw file directly into Photoshop's Camera Raw, activating the profile does not introduce edge artifact. LR Classic's Develop module is Camera Raw, but it's a built-in version rather than the free standing and separately updateable Camera Raw shared by Photoshop & some other Adobe applications. LR won't lose the artifact until Adobe issues an update of LR that includes the improved version of Camera Raw. Hopefully, that will be the next LR update, but only Adobe knows.

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S

seanson28

Participating Frequently

Any developments on this? It's been 6 weeks, and yet it's still happening in Lr and Camera Raw. Seems unique to this lens and not sure why it isn't resolved yet.

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C

christians51631465

Participant

Camera RAW 16.1.1 from End of Jan 2024 did not fix the issue.

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Sby

Participating Frequently

Hi,

Same problem for me, R6 Mark I + Canon RF24-105mm F2.8 IS USM Z , artifacts appears from 41mm and above.

Here is the workaround which works for me until the fix (Lightroom 13.1)

1. In Library :

- import your image

- select the images with Lens and Focal Length filter

2. In Develop module :

- Enable sync button

- Crop tool

- Enable Constrain to Image

Remove the artifact part, you loose few pixels in the process, but it doesn't seem to affect your original framing (really strange).

Don't forget to disable sync after !

Bests

1.

2.

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NYNCAuteur

Known Participant

This defect has been acknowledged by Adobe as a bug specific to the Lens Distortion profile for this lens. It was newly added to the Camera Raw 16.1 and LR Classic 13.1 updates in December 2023 just as the lens began to ship. Supposedly, Adobe will issue a bug fix. (See post from Rikk Flohr in this thread). If you turn off the profile, there's no artifact.

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A

A23197333tzcr

Participant

I wanted to report a bug in Camera Raw/Lr "Lens Profile Corrections" in which when using the new Canon RF 24-105 2.8 Z lens and having this lens correction enabled, there ends up being a distortion/artifact/banding around images once you get them into Camera Raw or Lr. I am using the Canon EOS R3 with the brand new Canon RF 24-105 2.8 Z lens (which came out a couple weeks ago) and images taken with this combo show the distortion or banding around the borders. This issue has been reported in many of the Adobe community forums and I believe updates were made to certain lenses to correct the issue but maybe since the RF 24-105 2.8 Z lens is brand new, either Adobe is unaware the same issue is happening to this new lens or the lens is just not supported as of yet in updates. I have a sample image to upload so you can see the distortion. I am using all the latest versions of Camera Raw and Ps. Using Mac Os.

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jsherringham

Participating Frequently

Any update on when this lens profile will be fixed?

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