On Fri, Sep 18, 2020, at 21:12, Dakin White wrote:

> What I don't get is where the lens ID comes from?  From what I've seen
> it's the lens manufacture but I don't see it as part of the exif data.

Most tools, including exiv2 and exiftool, by default print a "friendly" 
summary, with the literal values "translated" into more human-meaningful ones. 
If you want exiv2 to show "plain" (untranslated) values for the tags, use the 
"v" mode with the print option, like this:

 exiv2 -pv <filename>

It's possible that darktable etc could develop more robust methods to get 
useful values for this field (something like how exiftool derives values for 
its "composite" tags), but I've never looked very hard at the exiv2 API, and 
don't really want to at this point. ;-)

-- 
jys


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