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marika2263
December 5, 2025
Answered

Vignette problem with the Canon R6 Mark III

  • December 5, 2025
  • 1 reply
  • 661 views

Hi everyone,

 

I just bought the new Canon R6 Mark III that I pair with my Sigma 35mm f/1.4 Art (using the official Canon EF-RF mount adaptator).

 

The photos look perfect on the R6iii screen : no vignette, no distrosion, good WB, etc. But when I import the CR3 files on Lightroom (v15.0.1), they look very different : there is a HUGE vignette, and the tones are darker/bluer.

 

 

I can't get rid off the vignetting, this is the most annoying problem. The lens corrections feature detect the right lens/profile, but is useless in both mode Profil/Manual. Even if I push the values to 200, the vignette is still strong.

 

I use Lightroom since 2018 (and this particular lens since 2021) and never encountered something like that. I hope this will be fixed by a simple Lightroom update, as the R6iii is only two weeks old.

Thanks for reading, have a nice day !

 

settings recap :

Canon R6 Mark III

Sigma 35mm f/1.4 Art EF mount

Canon official mount adaptator EF to RF

Lightroom Classic 15.0.1
Macbook Pro Sonoma 14.8.2

Correct answer johnrellis

Thank you very much for your time and for your help. I tried and get the same resultat with the settings you suggest.

 

However, it is not right that we have to do that for every photo. This issue should be solved in one click : "Enable Profile Corrections" and that's all. Especially with a brand new / first-rate / pro camera like the Canon R6 Mark III. Since 2011, non of my previous DSLR has ever struggled to remove vignetting.

 

And as I said before, there is absolutely no vignette on my R6iii screen. The vignette appears in Lightroom only.


"there is absolutely no vignette on my R6iii screen. The vignette appears in Lightroom only."

 

JPEGs created by the camera contain noticeable vignetting too, as I showed with the JPEG preview above. You can demonstrate that by changing the camera to record both JPEG and raw and then examining both on the computer display. Examine the JPEG in Mac Preview to see what it looks like independent of LR, if you don't trust LR.

 

Camera screens aren't reliable indicators of what either JPEGs or raws will look like on calibrated computer displays -- the camera screens tend to be brighter (for good reason, so you can see them in variable lighting conditions).

 

Given that the camera-created JPEG also shows vignetting, the issue, as Ian suggested, might be that the Adobe lens profile was created using the lens on a camera not using the adapter, and the profile doesn't work as well with the adapter.  

 

"However, it is not right that we have to do that for every photo. This issue should be solved in one click"

 

There are three options going forward:

 

1. Post a request in the official Camera Raw thread that Adobe make a new profile that works better with the adapter (assuming the adapter is the cause):

https://community.adobe.com/t5/camera-raw-discussions/p-lens-profile-requests-and-information/m-p/12354777

 

Based on past history, it may take months for Adobe to do so, if they ever do.

 

2. Make a develop preset incorporating the lens profile and manual vignetting corrections, letting you correct an entire batch of photos with a couple clicks.  You can optionally apply that profile on import.

 

(Note to others: Creating a new lens profile default won't help in this case, because the best settings involve manual vignetting correction, which isn't captured in a lens profile default.)

 

3. Make your own lens profile using the free Adobe Lens Profile Creator:

https://helpx.adobe.com/camera-raw/digital-negative.html#Adobe_Lens_Profile_Creator

 

Unfortunately, Adobe hasn't done the trivial amount of effort to make it compatible with newer versions of Mac OS. But you could use the free trial of Parallels to run the Windows version of the Lens Profile Creator on your Mac.

 

This last option is obviously more involved.

 

 

 

1 reply

johnrellis
johnrellis
Legend
December 6, 2025

Share a sample raw with the problem here, and we can see if the issue is specific to your computer or occurs on other installations. If the forum won't let you attach the file here, upload it to Wetransfer, Dropbox, Google Drive or similar free service and post the sharing link here. 

M
marika2263Author
December 6, 2025

Here the sample RAW (expire Dec 9)

Thank you for your help !

johnrellis
johnrellis
Legend
December 7, 2025

[This post contains formatting and embedded images that don't appear in email. View the post in your Web browser.]

 

There are two separable issues: the color and tonal rendering of the raw by LR, and the lens vignetting. To investigate, I used Exiftool to extract the full-resolution JPEG preview (rendered by the camera) from the .cr3.  In what follows, if you click on each image, download it, and then open in your Mac or Windows image previewer, it will be easier to see differences.

 

Comparing the camera's JPEG preview with the default LR rendering of the .cr3, the JPEG preview is much darker than on the camera screen (not surprising), while the LR-rendered .cr3 is bluer and the JPEG preview redder, and the LR rendering has no vignetting correction yet:

Screenshot 2025-12-06 at 4.49.29 PM.jpg

 

Switching to the camera-matching profile Camera Neutral gets the colors closer:

Screenshot 2025-12-06 at 4.49.53 PM.jpg

 

The colors will rarely be exact -- the Camera Raw engine is different than the in-camera rendering engine, and while LR/CR's camera-matching profiles approximate the camera's rendering, it will never be exact.

 

Enabling lens corrections removes much of the LR-rendered vignetting, though there is still more than in the JPEG preview: 

Screenshot 2025-12-06 at 5.19.26 PM.jpg

 

Setting Profile > Vignetting to 200 and Manual > Vignetting to 41 removes all the vignetting, while the JPEG preview in comparison still has some:

Screenshot 2025-12-06 at 5.22.50 PM.jpg

 

Setting Exposure = -0.26 gets the overall tonal range of LR rendering closer, and now it's more apparent that there's still some moderate vignetting in the JPEG preview, especially in the lower left and right corners:

Screenshot 2025-12-06 at 5.29.19 PM.jpg

 

 

 

 

 

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