Chromatic abberations and defringing doesn't work

[spiderpod7d]

Hi Guys

 

I have asked about improving these adjustments numerous time without any fix being added to Affinity Photo. I am currently using a Nikon Z7II and 24-200 Zoom and process on a MAC pro running Monterey 12.3 with Affinity Photo 1.10.5. I read numerous reviews of this combination by pros I have followed, prior to purchasing this system, however they all use LR Classic for processing their images without this issue being present.

I print large and sometimes crop sections of images and the purple, blue and green fringing is visible at 1:1 on the size of prints I make.

This weekend I have taken the same images and ran them through darktable to see if I was expecting too Much. I have included two Jpegs one form darktable and the other from Affinity Photo. There is no colour artifacts on any of the edges of the darktable processing yet they are down right terrible from affinity Photo. ( have attached two Jpeg images AP first, then darktable and the original for you to play with)

Could some one please help me as I am extremely frustrated with this issue, to the point I may switch back to Light room even though I have invested two years of learning into Affinity Photo. This Is the only really big problem I have with the app, but I have may some suggestions as to features I would like to see going forward, but if I could solve this one issue I could live quite nicely with affinity Photo.

_DSC2210.NEF

[Old Bruce]

Can't say for sure as most of this is purely subjective. In my opinion the problem has nothing to do with neither chromatic aberrations nor de-fringing. I think you have way too much Sharpening/Detail Refinement going on there.

I shut everything off in the Develop section and looked quite closely at the image and I couldn't actually find either chromatic aberrations or colour fringing, this seems to be a very well made and designed lens. However over sharpening to the level that your screen shot shows adds quite a bit of what you may be thinking is colour fringing.

Just to be clear, we are talking about the transition from feathers to sky. The edges of the feathers, correct?

[spiderpod7d]

Hi Bruce

1 hour ago, Old Bruce said:

Can't say for sure as most of this is purely subjective. In my opinion the problem has nothing to do with neither chromatic aberrations nor de-fringing. I think you have way too much Sharpening/Detail Refinement going on there.

I shut everything off in the Develop section and looked quite closely at the image and I couldn't actually find either chromatic aberrations or colour fringing, this seems to be a very well made and designed lens. However over sharpening to the level that your screen shot shows adds quite a bit of what you may be thinking is colour fringing.

Just to be clear, we are talking about the transition from feathers to sky. The edges of the feathers, correct?

Thanks for responding

Your observations are interesting.

Neither of the Jpegs have any sharpening and are screen captures. The image shown from AP has not yet been developed and is straight from the Nikon Z7II. I also included the original raw file which is also direct from the camera with no processing applied. None o th images have sharpening applied.

I am talking about the blue present in the feathers in The AP image compared to the Darktable image not the transition between sky and feathers. The darktable and Adobe LR are both able to correct for the blue coloured contamination of the birds head feathers, AP does not regardless of how I adjust either Chromatic Aberration or defringing and I am using the lens profile with these attempted corrections. None of the images have any processing applied other than Chromatic aberration correction and defringe so now how you undeveloped them? 

I have also had Nathan C (moderator) say he was going to discuss with developers after uploading some of my images but never heard back?

 

On 3/25/2022 at 11:35 AM, NathanC said:

Hi @spiderpod7d,

I'm following this up with the team internally, could you provide us with the source RAW files prior to the HDR merge? Below is a private dropbox link if you wish to upload them there.

https://www.dropbox.com/request/dkKstol4vm6WDEYRy5bk

 

Could you please explain?

Thanks,

 

[Old Bruce]

20 hours ago, spiderpod7d said:

None of the images have any processing applied other than Chromatic aberration correction and defringe so now how you undeveloped them? 

Take a look at the settings in your screenshot for the Affinity Develop settings. The Chromatic Aberrations and the De-fringe adjustments are in the tab named Lens.

[spiderpod7d]

Hi Bruce

Yes but they have not yet been applied

Again, thanks for your input. I received a reply from Developers vis Nathan and it would appear that the chromatic aberration and defringe can't handle the problem as designed so I will have to look at something else or exchange the lens

Thanks for your help, just can't be fixed with AP

[Old Bruce]

15 hours ago, spiderpod7d said:

Yes but they have not yet been applied

I have to disagree. Your first screenshot clearly shows the application of the Detail Refinement being applied to the raw file that you supplied. Those settings are too high and are causing the problem that you are trying to fix with applying Defringe settings.

[spiderpod7d]

Hi Bruce

I apologize, you were correct sharpening was applied but that is not the problem. I have attached another screen capture and two originals so you can run it through AP yourself. If you are able to eliminate the blue in the feathers or the balcony edges I would appreciate know how you did it.

 

_DSC2209.NEF _DSC1919.NEF

[Old Bruce]

I would first turn off all the adjustments and look at the images at 100%. Zooming in too much is never going to make things easy for you.

There are two schools of thought about how much should be done with a raw file in the develop persona, one is Do as much as possible the other is to do the bare minimum. The shot of the pigeons needs very little done to it in my opinion. The buildings would benefit from a moderate amount of defringing. with the default purple colour and the  Also Remove Complimentary Hue checkbox ticked.

I would fix the exposure on the Buildings pic, then choose something like this for the fringing problem. Note that I did not use the Lens Profile for the Chromatic Aberrations, I think there is something wrong with that I was getting both Pincushion and Barrel distortion from it. Try this for a starting point.

 

To reiterate, I wouldn't use the defringe on the photo of the pigeons because I honestly don't see any. Fringing will mostly occur with bright white light near dark areas,  backlighting can show the most.

The Buildings may need two passes to get rid of both the purple and the green. If I were to use the defringing twice in the Develop Persona,  I would correct for basic noise and basic exposure in addition to defringing. Then do the rest of any contrast and sharpening etc. in the Photo Persona. 

Myself, I am amazed that the aberrations and fringing are so low for a lens with an eight to one zoom ratio and two dozen or so elements. But I do suspect there is something wrong with the lens profile for it.

[spiderpod7d]

Hi Bruce

 

Thanks very much for the input.

I will try all of your suggestions when I have a moment

All the best

Doug