Sigma 24-70 E mount lens profile problem

Forum|Forum|4 years ago
November 22, 2021
2 replies
1531 views

After the update a few weeks ago, the profile adapted to the 24-70 Art lens has a problem correcting dark corners, overcorrecting for bright corners, and I would like to know what is causing this problem.

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Todd Shaner

Legend

Please upload the file to Dropbox or other file sharing site and I'll take a look.

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锐宇21871131difnAuthor

Participant

https://www.dropbox.com/s/xkb69ld0eklw4jw/IMG_7874.dng?dl=0

Here is one of the photos that had the problem, I transcoded it to DNG format so you can view the lens correction changes in the software. This problem mainly occurs with Lr on iOS, which can't manually select a profile, so I'm guessing it may have applied the L-mount file incorrectly.

I hope you can find the problem as soon as possible, this problem is too serious for users who often use mobile outdoors, thanks a lot!

Todd Shaner

Legend

At the below post with the same issue the user found that turning off in-camera shading compensation reduces the excessive vignetting correction.

https://community.adobe.com/t5/lightroom-classic-discussions/sony-a7iii-sigma-24-70-2-8-dg-dn-lens-correction-over-correcting-vignette-at-24mm/m-p/11922221#M227356

Looking at your DNG file in LrC it's showing 'Built-in Lens Profile' applied. That profile includes distortion, chromatic aberration, and vignetting corrction. If I uncheck 'Enable Profile Corrections' the vignetting correction is insufficient with darkened corners. A v2 lens profile is being applied in LrC. If I change it to the v1 profile (i.e. no version number) the vignetting correction appears correct. Unfortunately, LR Mobile on iOS does not allow manually selecting a different lens profile. For the pictures already in LR Mobile you can use LR Desktop or LR Classic to process them using the v1 lens profile. Going forward try turning off the in-camera shading compensation setting and see if that fixes the issue.

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锐宇21871131difnAuthor

Participant

Hi, after the update a few weeks ago, my lenses appear overcorrected after performing profile correction, and the dark corners that should have been fixed become bright corners. This occurs on both the desktop and iOS side. My lens is a Sigma 24-70 ART E-mount.

Todd Shaner

Legend

Post merged.

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