Lightroom/Camera Raw: Improve chromatic aberration removal

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  • Idea
  • Updated 6 years ago
  • Implemented
  • (Edited)
The 100% screen grab below is from a NEF file (D700 600VR + TC17) at f/4. As you can see there is harsh blue and red CA. I cannot correct for both in LR but I can in View NX.

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Rory Hill

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  • frustrated

Posted 8 years ago

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Lee Jay

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Does a custom lens profile fix it?
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Rory Hill

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No, However, it is hard to do a custom profile for a 1000mm lens, so mine may leave something to be desired.
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Rob Cole

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So, you can not correct it manually either?
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Rory Hill

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No. I can correct for the red or the blue, but not both. Sometimes you can locally, but then it appears on another edge.
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Lee Jay

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"Sometimes you can locally, but then it appears on another edge. "

In my experience, this means one of two things. Either the radial shape of the lateral-CA correction isn't right, or there's some longitudinal-CA mixed in. The first is the reason I asked my first question - a custom profile should take care of that because its shape is not fixed like it is for manual CA correction. I realize the difficulty of producing a good one on a long lens as I tried to do it on my 1900mm telescope, but it should theoretically work if that is the problem. If the problem is longitudinal CA, LR can't correct for that.
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Rory Hill

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Thanks Lee jay. I'll try profiling again. Bottom line is that the Nikon software can correct it manually and LR cannot.
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Rob Cole

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Yeah, Lightroom lens correction has been a very great and worthwhile addition, and most the time its adequate, but it still falls short of Nx2 & DxO sometimes.
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Christoph B

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Yes, this is something I also would need.....
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Phil Drinkwater

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When LR3 came out and I saw the automatic lens corrections, I was extremely pleased - finally I'd be able to click a button and fix all of the lens issues :D I'd been struggling with trying to fix the chromatic abberation (CA) in my shots, especially from my canon 50mm 1.2 - lovely lens, but not great CA.

12 months on and I'm finding that mostly the automatic lens profiles work great, but CA control is just pretty much non existent. I also have defringe set to ON too, and occasionally I'll use the colour sliders, but nothing I do will get rid of the CA in my shots.

So... firstly does anyone have any pearls of wisdom for fixing it on a global basis? If not, Adobe, please make this part of your development for LR4 - it's the only thing which is letting down an otherwise fantastic rendering :)

This reply was created from a merged topic originally titled
Lightroom: Improve Chromatic Abberation ability.
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TK

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I also observed that apparently the scaling of colour channels is not done correctly for manual CA removal. Settings that are optimal for one part of the image don't work well for other parts. The camera software (Silkypix?) does a much better job.
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Rory Hill

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Lightroom 4.1 has solved all my CA issues. Many thanks to Eric for his work in this area.

Please consider marking this item as SOLVED.

Thanks again!
Rory
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Allan Olesen

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I agree. The new CA removal tool has given new life to my old pre-APO Minolta lenses.

If only there was a way to add it automatically upon export so I didn't have to do it during development.