How to stop LRc applying lens profiles?

[Alberti]

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In LRc the import process automatically applies a lens profile.

But the camera itself applies a correction. I have the strong impression that profile corrections are now applied double.

When you take a picture with both DNG + JPG, then you will see what I mean. The two files differ. Turning it off restores the geometry (not the size difference that for some reason is there too).

Adobe Community: "many Camera models have lenses that require lens corrections and the info is contained in the Raw file to be applied when processing. Lightroom Classic will apply the corrections at import, there is no option to turn off this feature."

Thanks a lot, Adobe. . .

• So how to overcome this? How to turn off?

1). I have several old wide angle lenses that benefit from the in-camera colour corrections. But post warps the image.

2) New lenses like 35mm Summicron gets elongated or stretched  in post automatically. Comparing, it is just not nice any-more.

Examples show it best on screen in jumping from one to the other, but anyway:

I have no brick wall or something easy for the phenomenon.

above DNG, then JPG. Look at the window left. With other lenses the warp in the middle is hilarious (awkward)

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[SrMi]

I doubt that the correction profile is applied twice.

LrC's Lens Correction panel shows "Built-in Lens Profile applied," and the Lens Profile selection is "Built-In." The only way to apply the lens profile twice is to manually select a profile in the Lens Profile selection, which should not be done.

You can remove the built-in profile from DNG using the DNG Cleaner app (Mac only).

[frame-it]

or  windows https://apps.microsoft.com/detail/9nk3sq79xr4d?hl=en-us&gl=IS

[Alberti]

Quote

I doubt that the correction profile is applied twice.

still there is a significant difference. That is why I made the in-camera JPG. 

I thought of testing with lens detection turned off in a profile versus applied. Would that be significant? Then I also would need a standardized subject like a checkerboard.. . .

I like the way I work now (simple import) and don't like yet another app (ACR). In fact, ACR I have not even installed.

[frame-it]

1 hour ago, Alberti said:

still there is a significant difference. That is why I made the in-camera JPG. 

I thought of testing with lens detection turned off in a profile versus applied. Would that be significant? Then I also would need a standardized subject like a checkerboard.. . .

I like the way I work now (simple import) and don't like yet another app (ACR). In fact, ACR I have not even installed.

switch the camera to "unknown lens" in the menu and take a shot and see, use capture one or rawdigger, shoot dng and jpg

[Alberti]

I’ll do that 👍

[SrMi]

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4 hours ago, Alberti said:

still there is a significant difference. That is why I made the in-camera JPG. 

I thought of testing with lens detection turned off in a profile versus applied. Would that be significant? Then I also would need a standardized subject like a checkerboard.. . .

I like the way I work now (simple import) and don't like yet another app (ACR). In fact, ACR I have not even installed.

Are you using an L or M mount 35mm Summicron?

Does your Lens Profile selection show "Built-In?"

[marchyman]

There is no built in profile for the M, at least for any of the M lenses I have.  I do see it for my original Q.  It looks like this in the Lens Correction pane

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I can apply other lens corrections, but why would I?  I leave the Enable Profile Corrections check box blank for the Q.

For my M I have lens profiles applied upon import.   That was something I had to select in my Leica M11 profile.  The Presets tab of Lightroom Preferences says to use the M11 profile when importing M11 images.

Do you have a preset automatically applied?

[Alberti]

Marchyman, that is a nice hint.

Indeed, on the M10r I do had my 'own' M10-R import setting. That is the root-cause of the trouble.  Now resorted to 'camera settings' on import.

The two images (imported DNG and in-camera JPG) are now virtually the same! (apart from a few rows of pixels that are shaved off in the JPG on the bottom and right side; but that has to do with the in-camera-processing.) The 'bulging' of the center , (a distortion like -5)  is gone.

The DNG, in the  tab Lens Corrections, ticking the box 'apply' or not, does now not give a difference anymore.

- There must have been a valid reason at one time to wander from the standard import line. But forgot. 😵