On 10/04/2016 09:46 AM, Roman Lebedev wrote:
> On Tue, Oct 4, 2016 at 4:42 PM, Maurizio Paglia <mpagl...@gmail.com> wrote:
>> Hi all,
>> my Tamron SP AF 17-50mm F/2.8 XR Di II VC LD Aspherical (IF) is not
>> recognized inside darktable
> 
>> but I have to select manually Tamron SP AF 17-50mm f/2.8 XR Di II VC LD 
>> Aspherical (IF).
> 
> On http://lensfun.sourceforge.net/lenslist/ i only see the following lens:
> Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical (IF)
> 
> Which is not "Tamron SP AF 17-50mm f/2.8 XR Di II VC LD Aspherical (IF)"
> ('VC' is missing)

Might be OT for darktable, but: these are indeed two optically different
lenses. The VC version however was calibrated too, and data is already
in the Git version of lensfun (which is used for calibration uploads and
tests; will appear in SourceForge version eventually):

Git commit 9d64f493418b30e93d9b926241d138ede126ff4d:
Date:   Thu Aug 11 22:20:23 2016 +0100
    Add Calibration for Tamron 17-50 f/2.8 VC
    Data from upload 895905 (issue #50). The lens is misidentified by
the current version of exiv2 as the Sigma 17-50, so must be manually
selected.

However there seems to be an issue with exiv2 reporting the lens identity.

-- 
Šarūnas Burdulis
http://math.dartmouth.edu/~sarunas
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