P: Lens Correction Profile for Canon RF24-240 exhibits edge artifacts.

[FeedbackCommunityMember]

The update introduced, and set as default, a version 2 lens correction profile for the Canon RF24-240 lens which causes the Raw image to display incorrectly by showing an area outside that of the matching camera Jpeg which is  blurred and distorted (I have only found this for images shot at zooms of 38mm upwards).  This region can of course be cropped out as it is not part of the intended image.  Reversion to the previous profile removes the problem.

[TheDigitalDog]

Others have reported similar issues. Do you see more than one profile to select? 

[nevwg]

Hi,
There are other profiles. Using those does NOT produce streaks, but they are not the profiles for the lens (ie, they are for lenses other than the 24-240),
Thanks!

[TheDigitalDog]

Sorry I wasn't clear. Some have reported two profile options for a specific lens and I was wondering if you saw that too. Apparently, one works and one caused the lines you report.

[nevwg]

Ah - no: there is only one profile per lens.

[warm_grace15B9]

My PC (Windows 10 version 21H1) just started blurring the edges of photos being imported. I have a Canon EOS R. Photoshop is importing the same photos without a problem. The same photos are importing fine on my laptop. Any suggestions? 

[kentdesign]

IS this "blurring" always there with Lightroom? Or if ou quit LR then reopen, is that "blurring" still there?

Lightroom IMPORTS photos - Photoshop OPENS photos.  So where are the photos themselves stored? Internal drive? External drive? Maybe a connection problem?

[warm_grace15B9]

It is still there. It seems to load correctly for a nano-second and then
blurs with the preview.

[GoldingD]

Is this for a particular lens?

Perhaps Canon RF 24-240mm F4?

see; Community Adobe LrC Bugs | "Artifacts" in LR Classic on imported photos

[warm_grace15B9]

Yes. That is the lens.

[kentdesign]

That IS interesting...did not think it would be a lens issue!!! Thanks for chiming in GoldingD!

[warm_grace15B9]

Stored on an internal drive. 

[warm_grace15B9]

I don’t think it is a lens issue as the photos come out fine in photoshop and on Lightroom on my PC. 

thanks

[nevwg]

I have just tested my 24-240 lens at different focal lengths. Profile correction is fine at 24 and 35, but above that there are streaks at the edges.

[warm_grace15B9]

Thanks Ian. That solved the problem. 

[defaultn0xa4ubuadgq]

Hi, how come when using Canon's RF 24-240mm, I get the following weird effects?
When I turn on the lens profile, I get the effect that the frame appears to be fraying at the edges in various stripes and colors. When I switch off the lens profile, the frame becomes slightly smaller and this fraying disappears of course. You do not have this effect at the smallest focal lengths.

[Ian Lyons]

It's a known issue with V2 profile for the RF 24-240mm. I describe the workaround at https://community.adobe.com/t5/camera-raw-bugs/p-lens-correction-profile-for-canon-rf24-240-exhibits... 

Note the screenshot is for Camera Raw, but there should be sufficient info for you to apply the same fix in LrC

[nevwg]

Yes - I found the other profile: problem solved - thanks!

[Photosbyhutch]

Two lens profiles for my Canon RF 24-240mm lens in both ACR and LR.  The first profiles seems to work correctly as does the second labled v2 in LR.  In ACR however the edges of the images are smeared when applying the v2 profile.

[TheDigitalDog]

Others have reported that as well, for the time being, pick the other profile. 

See:

https://community.adobe.com/t5/camera-raw-bugs/p-lens-correction-profile-for-canon-rf24-240-exhibits...

[janwh]

I have an Adobe creative account en probably have found a bug (Updates are up to date).

When I make a photo (canon eos R5) and view it with  e.q. faststone, there are no problems (so the camera/sensor is ok). But when I open the photo in Photoshop (RAW converter) is see al lot of lines at the edges op the photo. I have an example included! There is no way of get rid of this, only by cropping. I guess it is a bug, can you find out and help me? 

Thanks in advance,

Jan Willem Hage

[SH5EA9]

Hi, When I take photo's (always in raw) with the combi of the R6 and this lens, approx 60% of my photo's have major disturbances / "frays" (if that is the right word) on the left, right and bottom edges. I've attached an example. It does not happen in all cases. When I disable the profile correction the problem disappears. Same thing in Photoshop. The frays are not displayed when editing in Canon's Digital Photo Professional 4 .

The weird thing is, it does not happen to all photo's taken with this lens even with the option enabled.

Tried to attach the original CR3 file but the forum cannot upload files of that type.

best regards,

  Simon

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Application folder: /Applications/Adobe Lightroom Classic
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Settings Folder: /Users/shvanwijlen/Library/Application Support/Adobe/Lightroom

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Config.lua flags: None

[GoldingD]

Searching on  24-240mm  would show that this is a known issue with a workaround, Ahh, I see that you are new to the community. Known problem, see:

https://community.adobe.com/t5/camera-raw-bugs/p-lens-correction-profile-for-canon-rf24-240-exhibits...

[GoldingD]

Moderator, merge?

[powerful_grace0D44]

First time post so I hope I am doing this correctly. I am running the latest version of Lr Classic and have a Canon R6 with firmware 1.3.1.  As of 9/15/2021 I started to get a weird border around a lot of my photos.  Please see attached photo.

It appears to be similar to an issue that was reported back in 2017 when Canon introduced the GX camera and it turned out it was an Adobe problem.  Could this be a similar issue? Any thoughts on the best way to proceed? - down rev LR to the previous version?  The issue does not seem to show up in Canon DPP.

Thanks.

[John R Ellis]

Adobe has acknowledged this bug with the v2 version of certain lens profiles. The workaround is to change to the v1 lens profile in the Lens Correction panel. See the bug report for details:

https://community.adobe.com/t5/camera-raw-bugs/p-lens-correction-profile-for-canon-rf24-240-exhibits...