ptr-nl

Use "exiftool -n" to get results 'without changes'. Everything you write is correct. But I also have a Canon EF-S Body which I can use with EF lenses. And 3% difference does not look much but still. Somehow this information is needed to convert from raw to image with corrections.

It gets more interesting... About the crop factor or focal length multiplier: Everyone writes on internet 'The camera has a full frame sensor so this is 1.0' but my camera is writing 0.971 ( 35 mm equivalent: 48.5 mm ) / ( Focal Length: 50.0 mm ) in the metadata of the raw. The Lensfun database mentions a cropfactor of 1.0 which is not good in my case. So I also need to overwrite or replace the camera profile. Is there a way to give priority to a local Lensfun database, then the central database, then some kind of default? So replace and not merge?

You can try this raw: https://www.grpbx.nl/s/J9Arda6ZZwlyWHqk Like I wrote, the 100mm works fine, the 28mm seems to mix something but I don't know what. But I will remember this heading, thanks. I am just not sure which version to use, 1 or 2.

Sure, this is what I have so far. slr-canon.xml

Since the lens 'Canon EF 100mm f2 USM' is not supported, I also created a profile for this lens. After opening a RAW photo, I see that Affinity Photo recognizes the lens and chooses my created profile. I also see that the fields Lens Profile, Chromatic Aberration Reduction and Remove Lens Vignette are automatically / initially checked. The results after correction look good.

When I open my Canon CR2 test photo in Affinity Photo, the application recognizes the correct Lens profile 'Canon EF 28mm f/1.8 USM'. So this profile is included in the application. The Distortion correction is not good, however. I also noticed that Chromatic Aberration Reduction and Remove Lens Vignette are not automatically checked. Turning Remove Lens Vignette on gives a better result but is still not perfect. This whole profile seems wrong. So I decided to create my own lens profile for the Lensfun project and added distortion, tca and vignetting elements in the XML. I copied this XML to the correct directory and my lens profile is now visible in the list. To recognize my own profile I added two characters at the end of the name. When I again open the test photo I have exactly the same results. Affinity Photo recognizes its own profile. When I change the Lens profile to my created profile, the distortion correction is way better. The application responds to my profile! Yeah. Still no checked boxes in the other two fields. When I turn on Remove Lens Vignette I get exactly the same result as before. It even seems that this correction is not responding any lens profile I choose. I get the same result with different lenses from the list. Where are Chromatic Aberration Reduction and Remove Lens Vignette getting its information from? Not from the Lensfun database I guess.