Hello,
The issue is that the camera (canon 6d) stores in the metadata that the lens is irix 11mm and when I edit (in my case in Darktable) does not apply the proper geometrical corrections because it does not identify the lens well.
The lens is presented as 11mm f/4 to the camera.
I have lowered the correction profiles for Adobe that IRIX has hung on its web (Support - Irix lenses were designed with both the effort and experience, of not only engineers, but also photographers. Swiss precision and Korean innovation create), I have lowered the profiles for 11mm and 15mm, I have opened them with a text editor and it turns out that IRIX uses the same target identifier in Canon frame:
IRIX 11mm profile extract, in bold the target identifier code:
…
stCamera:MakeCanon</stCamera:Make>
stCamera:Lens11mm</stCamera:Lens>
stCamera:LensID60</stCamera:LensID>
stCamera:LensInfo11/1 11/1 0/0 0/0</stCamera:LensInfo>
stCamera:FocalLength11.000000</stCamera:FocalLength>
…
IRIX 15mm profile extract, in bold the target identifier code:
…
stCamera:MakeCanon</stCamera:Make>
stCamera:Lens15mm</stCamera:Lens>
stCamera:LensID60</stCamera:LensID>
stCamera:LensInfo15/1 15/1 0/0 0/0</stCamera:LensInfo>
stCamera:FocalLength15.000000</stCamera:FocalLength>
…
As you can see, both profiles use the same target identifier, a full-fledged veneer, which means that both targets are presented in this way to the camera and recorded in EXIF.
In case of doubt I went to the page of the Exiftool project, they have a list of all objective identifiers (Canon Tags).
Well, as confirmed, ID 60 corresponds to IRIX 11mm f/4, a second entry for IRIX 15mm f/2.4 would be missing.
Is there a way to fix this?
I reported the problem also in the exiftool forum.
Thank you very much in advance.
And I apologize if my use of language has not been appropriate, I had to use the translator because my English level is very bad.
Thank you very much.
A greeting,
Iñaki