Beta version and DXO pureraw 4 pre-processing DNG files

[Cyberpeter]

Hi, I am using the beta version since the .cr3 files from my Canon R5 MKII can be read. I use Pureraw 4 as a pre-processing step. The DNG file can be read without problem with the released version 2.5.7. However, if I open it in the beta version 2.6.0, it shows terrible chromatic aberrations ! I attach pictures of my computer monitor showing the problem ( one displayed in version 2.5.7, and the same displayed in beta version 2.6.0). Forget about the pictures being bad. Look at the aberrations. This is the same DNG file in both.

 

 

[carl123]

3 hours ago, Cyberpeter said:

The DNG file can be read without problem with the released version 2.5.7.

Can you upload the DNG file to the forum?

[Chris B]

Hey Cyberpeter,

As carl123 has suggested, we need the DNG if possible so that we can look into this for you.

[Cyberpeter]

Here it is.

20250107-1Y2A8442.dng

[Hangman]

Hi @Cyberpeter,

Changing the Chromatic Aberration setting from Use Lens Profile to Estimate from Image appears to correct the issue...

Note: I see the same Chromatic Aberration in both 2.5.7 and the 2.6 Beta...

[carl123]

5 minutes ago, Hangman said:

Note: I see the same Chromatic Aberration in both 2.5.7 and the 2.6 Beta...

Same here
 

5 minutes ago, Hangman said:

Changing the Chromatic Aberration setting from Use Lens Profile to Estimate from Image appears to correct the issue...

I don't have that drop down on Windows 

But I can switch Chromatic Aberration Reduction on and off and switching it OFF corrects the issue - go figure!

[Cyberpeter]

That's right . I got this unchecked by default in my released version 🙄. How I do it ? I don't remember.

 

[carl123]

2 minutes ago, Cyberpeter said:

That's right . I got this unchecked by default in my released version 🙄. How I do it ? I don't remember.

 

I assume if you switch it off in the beta then all is well?

[Cyberpeter]

ok found it. Everything is alright now.

[carl123]

2 minutes ago, Cyberpeter said:

ok found it. Everything is alright now.

Mystery solved

Apart from why does Switching it off cure the issue

Maybe one of the support staff/devs could advise on that in the future

[Hangman]

37 minutes ago, carl123 said:

But I can switch Chromatic Aberration Reduction on and off and switching it OFF corrects the issue - go figure!

Same on Mac... Strangely the Help file on Mac (as Windows) says of the Chromatic Aberration option "This adjustment has no customisable settings." However, I think the link in the Help file is possibly pointing towards the wrong option, i.e., the Chromatic Aberration filter...

Interestingly, opening the DNG in PhotoPea doesn't show any Chromatic Aberration...

[fde101]

19 hours ago, carl123 said:

Apart from why does Switching it off cure the issue

Chances are that PureRAW already corrected for the CA, so when you open it in Photo and it tries to correct it again, it winds up over-correcting it and creating new artifacts?

[Chris B]

On 2/7/2025 at 4:20 PM, carl123 said:

Maybe one of the support staff/devs could advise on that in the future

It looks like it's just working contrary to what the label says... I'll get it logged.

[Affinity Info Bot]

An issue raised in this thread ("The checkbox for 'Chromatic Abberation Reduction' is working in reverse") has now been reported to the developers by the testing team (Ref: AF-5845). Thank you very much for reporting this issue to us.

[Chris B]

This may not actually be a bug.

PureRAW produces pre-processed linear DNGs with optical corrections applied. Photo doesn’t know about these corrections, so is inadvertently applying its own corrections unnecessarily.

On macOS, using Estimate from Image will correct this with the checkbox for Chromatic Abberation Reduction enabled. As it has been pointed out, this is missing on Windows which I have also logged.