Performing lens corrections (color shift) on LR

[oyebto]

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Hi! wanted to ask this question, unable to find the answer to it.

 

In M240 we are able to select a lens profile for the lens and this can be done automatically. It is possible to turn off the lens detection in camera and later on apply all the same corrections (color shift, etc) on lightroom? I tried loading a lens profile on a DNG via lightroom but it doesn't correct color shifts, just distortion and vignetting... I currently own a SEM 21 f3.4 which exhibits very slight magenta color shift on the right side.

[jaapv]

If you want to do a correction of an edge colour shift you should use flat field correction. The lens corrections in L|R do not address colour shift.

[scott kirkpatrick]

Hi! wanted to ask this question, unable to find the answer to it.

 

In M240 we are able to select a lens profile for the lens and this can be done automatically. It is possible to turn off the lens detection in camera and later on apply all the same corrections (color shift, etc) on lightroom? I tried loading a lens profile on a DNG via lightroom but it doesn't correct color shifts, just distortion and vignetting... I currently own a SEM 21 f3.4 which exhibits very slight magenta color shift on the right side.

 

Cornerfix (a free download from SourceForge) was created to handle these corrections, especially for lenses that Leica doesn't recognize.  You need to shoot a reference image at the same aperture (and indicated taking distance, which fixes lens-to-chip distance, since the neutral image does not have to be in focus), and then Cornerfix derives the field color corrections from it.  In the NFDB world this is called "lens cast correction (LCC)" and CaptureOne has a panel for it.

 

scott