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#76 No auto identification in Darktable

wont-fix
Torsten Bronger
None
2017-04-24
2017-03-30
COMPUTERFREAKED
No

I cloned the lastest lensfun from github today. When I was checking my pictures in Darktable my 19mm F2.8 Sigma lens is not detected automatically anymore.

I checked the mil-sigma.xml file, there seem to be 2 entries for this lens. 1 Set of corrections is calculated based on a OMD E-PL3, the other on an A6000 (data previously provided by me).

The A6000 one has a note :

<!-- Identifies itself at Sony cameras as “E 19mm F2.8”. -->

The auto detection works when 

<model>Sigma 19mm f/2.8 DN</model>

is changed to

<model>Sigma E 19mm f/2.8 DN</model>

(note the extra E)

Not sure if this fix is suitable for all users but I just wanted to inform you about it.

Discussion

  • Torsten Bronger

    Torsten Bronger - 2017-04-24
    • status: open --> wont-fix
    • assigned_to: Torsten Bronger
     

  • Torsten Bronger

    Torsten Bronger - 2017-04-24

    I think this is an exiv2 bug because this lens surely does not have the name “E 19mm F2.8”. Even worse, if Sony published a lens with the same characteristics, they would share their exiv2 name. It may be that exiv2 cannot do any better because the camera does not embed enough information but there we go …

    Anyway, Lensfun contains the correct names of the lenses, and tries hard to support autodetection. But the first has priority over the latter.

     
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