Lightroom/ACR: Don't remove manual Chromatic Aberration and Defringe capability

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  • Updated 8 years ago
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I love Lightroom 3, and Adobe products in general, but I'm very disappointed in the loss of control I have over Chromatic Aberration and Defringing in the Lightroom 4 beta, as compared to LIghtroom 3.

I miss the CA slider on the Profile tab, and also the Red/Cyan and Blue/Yellow sliders on the manual tab. Is there any chance we can have them back? Auto is good when it works, but I shoot RAW and use Lightroom because I can often get better results by doing some things manually. I also use Lightroom for editing images taken with lenses that don't have profiles, including manual focus lenses that don't tell the camera what the focus distance is and a great manual-focus zoom that doesn't provide focal length info. I also use it for non-destructively editing images scanned from film. Having manual control of CA and fringing is important to me.

This new version also seems to weaken the Defringe function. It just doesn't go nearly far enough to remove fringing from many of my photos, like older ones shot on my D70/18-200mm combo, for example. I've gone back and forth between versions, and Lightroom 3 does a much better job for me.

If you really want to turn my frown upside down, instead of a defringe check-box, could we have a slider? Or ideally even a few sliders, so we could control color fringing similar to what can be done with the sharpening controls: in terms of strength, but also how contrasty an edge needs to be before it is affected by defringing, and the radius the of effect. Could we have a defringe function on the adjustment brush, or have separate control of magenta and teal fringing?

Thank you for your great products and continual improvements. I will still buy Photoshop no matter how great Lightroom becomes.
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ja yo

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Posted 8 years ago

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Chris Ogden

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piotrh01 thanks for the heads up.

Rikk, the other threads about Local Status flags should be separate; however they share the trait of the loss of some key functionality bt. LR3 and LR4. They are similar in that many request the ability to continue to have manual controls, and not be "dumbed down." Thanks.

piotrh01 The topics about the Data Loss caused by the hiding of Local Flags seem to now be:

http://feedback.photoshop.com/photosh...

http://feedback.photoshop.com/photosh...

http://feedback.photoshop.com/photosh...
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Rikk Flohr, Champion

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New CA Tools available in the LR 4.1 RC2... Check it out and see if this meets the need! http://labs.adobe.com/
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Chris Ogden

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Wow - great responsiveness! Now any chance to keep it going and allow Local Flags too?
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Rikk Flohr, Champion

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Once a couple of you have tried out the new tools, I am going to mark this thread solved. Keep us in the loop on your experiences!
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Rikk Flohr, Champion

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Tutorial for using the new CA Tools: http://blogs.adobe.com/lightroomjourn...
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Official Response
Per Rikk:

New CA Tools available in the LR 4.1 RC2...: http://labs.adobe.com/technologies/li...

Tutorial for using the new CA Tools: http://blogs.adobe.com/lightroomjourn...
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Marli Wakeling

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It is great that changes have been implemented. I have felt like many of us were being dismissed with defensiveness, with the exception of those in software engineering, to whom we sent examples where Auto CA removal did not work well and have been very receptive. Hopefully, this will help those of us that shoot in unusual circumstances and with different lenses, filters, diopters, ports and underwater housings.

I have a question. How will these new tools affect images processed in LR 3 and earlier if imported into LR4.1 if I do not update the process to 2012? Will old manual CA settings be changed as before in LR4 or will the original manual settings remain? I have no desire to go back and redo CA removal with the new sliders on thousands of images, which means that I would have to hold onto LR3 for anything already processed.
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Rikk Flohr, Champion

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The new CA tools are only available in PV2012.

I will defer to an engineer on your other questions. Hopefully one will be along shortly.

I will say that an important rule of thumb in the implementation of LR 4 is if you don't have to rework an image, don't! Leave it alone unless there is a compelling reason to update your processing...
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Marli Wakeling

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My question is because LR4 updated all photos from old catalogs to Auto CA removal and disregarded the earlier process (2010) manually controlled CA removal even without updating the process to 2012. You had the choice of no CA removal or Auto. This is why I could not use LR4.
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ja yo

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The new defringe control is terrific, especially the split sliders, which allow us to be very selective of what color ranges are affected. I've tried out the new capability on a couple dozen images from a few different lenses, and so far it seems to work very well.The lateral chromatic aberration correction also seems to work very well.

My thanks to Eric Chan, Jeffrey Tranberry, and the others who worked on this and made it happen.
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Marli Wakeling

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Okay. I have installed LR4.1RC2, and it appears that any changes made in older processes using the manual sliders are gone. Could someone comment on this? The implication is that one will have to keep LR 3.6 or redo CA correction. Now, if I can create a preset like I did for several lenses that corrected well for most images, so that a tweak was only rarely necessary, fine. Hopefully that will be the case.
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Lee Jay

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"Could someone comment on this?"

If you had manual correction, it turns on the auto lateral CA correction.
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Marli Wakeling

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It does; but in my test images do not correct in the corners, just as in LR 4.
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Lee Jay

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If you have an image that has lateral CA that the auto switch doesn't correct, you should post it. My guess is that it's actually axial CA, and that's what the new tools are for.
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Marli Wakeling

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Lee, we have had this discussion earlier. I have posted examples on earlier threads and sent them to Eric as well. I have even tried the axial correction tools as although the fringing looks a little like purple, it is blue. Correcting using the dropper tool results in weird halos and colour shifts, as it is in fact lateral CA.
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Marli Wakeling

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I have attempted to use the new controls, but have realized that there is still no way to manually correct lateral CA. I tried with the same images sent in to Eric, and no success. On extreme corners with bright reflective bits (underwater shots) there is still blue/yellow fringing that is still not corrected as well as in LR 3.6. Auto is still Auto. I applaud the addition of axial CA removal controls, but it does not address what so many have asked for: the return of Lateral CA removal controls.
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electro-ete

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This does nearly all I want.
many thanks for not only listening, but doing

... unfortunately the whole thing is still so overwhelmingly slow as to be nearly unusable ... but that's a whole other issue
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james jones

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I would like to congratulate the team on the development of the fringe correction. LoCA has been a nightmare for a long time and I really believe this is a major breakthrough in technology. It's the first time that LoCA gets addressed to in a serious and complete form.
Thank you guys!!
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David Bleeker

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In the latest update for Camera Raw for CS5 the chromatic aberration sliders have disappeared??? Why?


David

This reply was created from a merged topic originally titled
Chromatic aberation sliders??.
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piotrh01

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No way....
This is outragious!
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Lee Jay

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I know --- the new systems work amazingly well!
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David Bleeker

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Rubbish, if there is no profile it does not work at all. Example is the Canon EF24mm f/3.5 TS-E which needs some adjustment depending on the shift used.

David
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Lee Jay

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The old sliders couldn't do anything about that because the optical center was assumed to be in the frame center, which it isn't on that lens when it's shifted. New new auto control can alter that parameter.
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David Bleeker

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If there is no profile of the lens there is no way that you can adjust for chromatic aberration in the new ACR. In the 24TS-E the controls were working, maybe not perfect but enough for this lens as it has not much CA. But the auto control will be absolutely useless when there is no profile of a lens.

And there are still a huge amount of lens profiles missing in Camera Raw.

Thereby not every lens is identical so to be able to tweak the CA manually is invaluable. And I think it is a big mistake to think auto control will be able to replace manual sliders.

Of course Adobe will demonstrate that it works great in there product presentations but as we have seen all too often the Adobe demos do not work always that well in real life and real work.
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LRuserXY

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Quote: "If there is no profile of the lens there is no way that you can adjust for chromatic aberration in the new ACR. (...) the auto control will be absolutely useless when there is no profile of a lens.

That is simply not true! The new CA correction analyses the image *independently* of any lens profile for uniform RGB channel displacements and corrects the CA based on that findings. As Lee Jay already pointed out, that also works for asymmetric CAs such as CAs produced by shift lenses. This is not only theory - I *know* that it works first hand: One of my lenses produces such asymmetric CAs because of decentering - and Lightroom 4.x is able to *perfectly* correct those CAs.

Oh and yes, I removed the lens information metadata from these raws before, and the automatic CA correction still works perfectly - without LR having any idea which lens profile to use.

P.S. Because you initially posted about Camera Raw for CS5 (ACR 6.7) and not Lightroom, I loaded the above mentioned raws also into PS CS5 / ACR 6.7, and just like LR4, ACR 6.7 was able to correct the CAs even though it did not recognize the lens because of the removed metadata.