Lightroom Mobile: Lens Vignetting not working

  • 1
  • Problem
  • Updated 3 weeks ago
  • (Edited)
Hello everybody,

I came here from https://community.adobe.com/t5/lightroom-for-mobile-apple-tv/lr-mobile-s-lens-vignetting-not-working...

Using Lightroom Android 5.3 on a Huawei P30 Pro, there is severe vignetting on the rear camera and especially the ultra wide camera.

The correct lens is selected, distortion correction is working fine but lens vignetting has absolutely no effect.

Example screenshots of a white paper sheet showing the problem:



I have also tried to manually select other lens profiles but no visible effect either. And the exported image is also affected - so to me it seems like the feature does not work at all.
Photo of Rüdiger Greeb

Rüdiger Greeb

  • 4 Posts
  • 0 Reply Likes

Posted 1 month ago

  • 1
Photo of Ronald Chambers

Ronald Chambers

  • 117 Posts
  • 16 Reply Likes
Is that from the flash rather than the lense?  If so is the flash in the same location spatially pr offset to the side.  If offset, the vignette compensation will not work as the shapes will be different.  I'd try the experiment without the flash to know what the source of the problem true is.  If it is the flash, you probably need to shoot further from the paper.  If you determine it is the lense, can you apply the compensation multiple times?

RONC 
Photo of Rüdiger Greeb

Rüdiger Greeb

  • 4 Posts
  • 0 Reply Likes
Hi Ronald, thanks for your reply. That's not from a flash, it's only the lense. Image has been taken outside in the evening (ƒ/2,2-1/320-2,35mm-ISO 100). There's only a bit of shadow in the lower left - this is the Huawei JPEG that is compensated for lens vignetting:



I don't think it's possible to apply the compensation multiple times. It should be applied by factor of 2 when setting the slider to 200. But as you can see, there is no compensation applied at all.

Photo of Ronald Chambers

Ronald Chambers

  • 117 Posts
  • 16 Reply Likes
The vignetting compensation, by definition, is circular about the center of the image.  Vignetting is like this:


Your image above doesn't show a circular shape but just one corner being dimmed.  This tells me there is not consistent light entering the lense.  With my cell camera, I find that I have a terrible time getting an image where the light is even unless I'm shooting only through the center of the lense. Is the lense recessed into the camera?  There is something reducing the light from entering the lens.  It's not a finger that is doing it is it?

I don't know it you can do this in Lightroom but in Photoshop on PC, I make a layer copy, desaturate, apply a very heavy Gaussian blur, invert the luminance, and then multiply that on  your image.  You use opacity to adjust for the level. 

RONC


Photo of Todd Shaner

Todd Shaner, Champion

  • 2003 Posts
  • 673 Reply Likes
All of the Huawei P30 Pro lens profiles in Adobe Camera Raw 12.3 and LR Classic 9.3 have the Lens Corrections Profile Vignetting slider fixed at 100, grayed out and not adjustable. I assume vignetting is corrected in-camera and applied to the raw data and additional correction should not be necessary. So it appears there is an issue with the lens profiles in the LR Android Mobile app. Import the DNG file into the LR Classic or Desktop app and check the vignetting.


Photo of Rüdiger Greeb

Rüdiger Greeb

  • 4 Posts
  • 0 Reply Likes
That's good to know as I don't have the desktop versions of ACR and LR. So it probably means there is no vignetting correction in the Adobe Profiles and the bug is that LR Mobile does not make that clear by disabling the slider.
I found an interesting discussion over at https://www.dpreview.com/forums/post/63596304
I'm not too sure anymore if the vignetting correction can be made right with ACR profiles. There seems to be a color shift in the vignette that needs correction, too.
Photo of Ronald Chambers

Ronald Chambers

  • 117 Posts
  • 16 Reply Likes
There is a color shift in the compensation but that problem doesn't show in your images either.  You have something obstructing the light on the lower left corner of that latest image.  Can you send me a raw file of shooting straight on to the paper?  I will run ACR in PS as well as analyze the decay pattern it shows.

RONC
Photo of Todd Shaner

Todd Shaner, Champion

  • 2003 Posts
  • 673 Reply Likes
As part of your Adobe plan you have a license to use LR Desktop app. If you have a Windows or Mac system that meets the system requirements you can install and use it.

Concerning the vignetting in your posted screenshot it could be due to the close focusing distance. Lenses tend to exhibit more vignetting at their closest focusing distance. Try shooting an evenly lit wall at a further distance and see what the vignetting looks like. Also try the other two lenses, which may work better at close focusing distances.

https://helpx.adobe.com/lightroom-cc/system-requirements.html




(Edited)
Photo of Rüdiger Greeb

Rüdiger Greeb

  • 4 Posts
  • 0 Reply Likes
OK, I did some more investigation on the issue and ended up downloading the Adobe DNG Converter that includes all LCPs of Adobe Camera Raw 12.3, including the ones for the P30 Pro.
And I downloaded the Adobe Lens Profile creator to be able to create my own profiles for the phone's lenses.

Now it's clear that the included LCPs do not contain vignetting information. The section "stCamera:VignetteModel" is missing but is included in my self-created LCP.

Question now is how to import the custom LCP into Lightroom Android App?
I see a folder Android/data/com.adobe.lrmobile/files/carouselDocuments/00../Profiles/Settings/UserCameraProfiles and tried to copy the LCP there but it cannot be selected as lens profile in the app.

Does anybody know if there is a way to do that?
Photo of Todd Shaner

Todd Shaner, Champion

  • 1993 Posts
  • 672 Reply Likes
Using LR Desktop 3.3 and LR Mobile for Android 5.3 I did all three steps and custom lens profiles are not showing on my Samsung Note Pro 12.2. They are showing in LR Desktop 3.3 and in LR Classic 9.3.
I have raw lens profiles that were converted for use with JPEG files (5 profiles) and lens profiles obtained using the Lens Profile Down Loader (35 profiles), which is no longer active. Here's the folder structure, which works with no issues in LR Desktop 3.3 and LR Classic 9.3.

The index.dat file contains information on the 40 total lens profiles. However, the pscache.dat file in the 1.0 folder with the downloaded lens profiles contains entries for hundreds of lens profiles. I assume that's something that is (was) used with the Lens Profile Downloaer.



Photo of Rikk Flohr

Rikk Flohr, Official Rep

  • 7701 Posts
  • 1760 Reply Likes
See my note above Todd, I've updated the information there. 
Photo of Todd Shaner

Todd Shaner, Champion

  • 1993 Posts
  • 672 Reply Likes
Custom created LCPs do not sync to the cloud from the Desktop applications.
Rikk, I found a post that is marked 'Implemented' concerning ability to sync custom lens profiles to LR Mobile. At that post Johan Elzenga stated "You can sync these profiles through Lightroom desktop." Is that correct or should it be changed to reflect what your saying? From my testing it's currently not possible at least with LR Mobile for Android. Thank you!

https://feedback.photoshop.com/photoshop_family/topics/sync-lcp-lens-profiles-with-lightroom-mobile-...
Photo of Rikk Flohr

Rikk Flohr, Official Rep

  • 7701 Posts
  • 1760 Reply Likes
While I am still checking with engineering, I think that LCPs may sync between instances of Desktop but I am not sure.  In any case, I've removed the implemented tag from the other post. 

Custom LCPs syncing becomes a feature request which is the link above. 
(Edited)
Photo of Todd Shaner

Todd Shaner, Champion

  • 1993 Posts
  • 672 Reply Likes
Thanks, that makes sense now.