Hi Jos,
You are deeper into the code than I have ever ventured, but I know that
Adobe needs to decode the so-called Makernote-tags in EXIF to extract
info about lenses.
I know from experience that some lens codes between Sigma and Pentax
overlap, so maybe the .dll contains code to try to discern between
lenses based on multiple tags. That would at least explain why the brand
names show up in a pre-compiled library.
It would not surprise me at all if the large brands have implemented
lens-ID encoding in such a way as to be unique, self-contained, and by
such and algorithm that the lens names can be extracted without
ambiguity. Take, for example, a look at how the Canon lens-IDs are
sorted in EXIF here:
https://sno.phy.queensu.ca/~phil/exiftool/TagNames/Canon.html#LensType
HTH,
Jostein
Den 18.07.2018 11:47, skrev Jos de Fotograaf:
Dear group,
I was looking into the cameraraw.dll file to correct the lensname of
some of my SIGMA lenses.
I noticed that there are lensnames for Pentax, Sigma, Tamron and some
more brands, but not for Canon or Nikon.
My question is: how is the lensnaming for Canon and Nikon applied in
Lightroom, is there another system than applied for Pentax?
Greetz, Jos
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