Igor,
For comparison here is the output with the Canon 70-200 which is definitely
known to exiv2:
$ exiv2 -pt 20160207_114150_7099.cr2 | grep -i lens
Exif.CanonCs.LensType Short 1 Canon EF
70-200mm f/2.8L IS
Exif.CanonCs.Lens Short 3 70.0 - 200.0 mm
Exif.Canon.LensModel Ascii 74 EF70-200mm
f/2.8L IS USM
Exif.Photo.LensSpecification Rational 4 70/1 200/1 0/1
0/1
Exif.Photo.LensModel Ascii 25 EF70-200mm
f/2.8L IS USM
Exif.Photo.LensSerialNumber Ascii 11 0000000000
The difference is that exiv2 has mapped the Exif.CanonCs.LensType ID number
into a lens name. I must admit I don't why exiv2 works that way,
particularly given these IDs sometimes clash, i.e. more than one lens uses
the same ID and then it is necessary for the library to look at other
pieces of data too.
Anyway, it is necessary to get exiv2 to be able to map the lens ID to a
string. If you grab the source for exiv2 you could try the attached patch.
Regards,
Steve.
On 26 February 2016 at 17:48, Igor Blanco <igor...@gmail.com> wrote:
> Hi everyone,
>
> Not sure if this could be a bug or something related to my installation so
> I decided to write here before just in cae.
>
> I have a "TAMRON SP 70-200mm F/2.8 Di VC USD" with Canon mount, I use it
> on my Canon 6D.
>
> This lens was not part of lensfun so lens correction could not be applied
> to it. So I send Torsten Bronger the requested Raw samples and he was
> really kind to prepare the required lenscorrection profile.
>
> I suppose this correction profile will go into lensfun's next release but
> I attach it here so that anyone with the same lens can test and use it now
> by placing it in ~/.local/share/lensfun directory.
>
> If I enable lens correction module in darktable though the lens is not
> correctly detected, I can choose the lens by hand and it works great but it
> is not detected automatically. Instead a 255 appears where the lens model
> should appear.
>
> Torsten told me that this is probably related to Exiv2 library so before
> reporting to them I tried this command on my Ubuntu 14.04: exiv2 -pt
> 20160117_0011.CR2|grep Lens
>
> And this was the output:
>
> Exif.CanonCs.LensType Short 1 255
> Exif.CanonCs.Lens Short 3 70.0 - 200.0 mm
> Exif.Canon.LensModel Ascii 74 TAMRON SP
> 70-200mm F/2.8 Di VC USD A009UUD
> Exif.Photo.LensSpecification Rational 4 70/1 200/1 0/1
> 0/1
> Exif.Photo.LensModel Ascii 40 TAMRON SP
> 70-200mm F/2.8 Di VC USD A009
> Exif.Photo.LensSerialNumber Ascii 11 0000000000
>
> So it seems to me that Exiv2 does indeed recognize the lens.
>
> I have shared a RAW in case someone can check if it also happens to them:
> https://www.dropbox.com/s/55jh1w7mkoc3ox2/20160117_0060.CR2?dl=0
>
> Any clue? Should I report this as a darktable bug?
>
> Thanks
> =============
> Igor Blanco.
>
>
>
>
> ------------------------------------------------------------------------------
> Site24x7 APM Insight: Get Deep Visibility into Application Performance
> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
> Monitor end-to-end web transactions and take corrective actions now
> Troubleshoot faster and improve end-user experience. Signup Now!
> http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
> _______________________________________________
> Darktable-users mailing list
> Darktable-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/darktable-users
>
>
--- trunk/src/canonmn.cpp 2016-02-27 14:13:50.412000629 +0000
+++ new/src/canonmn.cpp 2016-02-27 14:17:03.324374253 +0000
@@ -910,6 +910,7 @@
{ 254, "Canon EF 100mm f/2.8L Macro IS USM" },
{ 255, "Sigma 24-105mm f/4 DG OS HSM | A" }, // 0
{ 255, "Sigma 180mm f/2.8 EX DG OS HSM APO Macro" }, // 1
+ { 255, "Tamron SP 70-200mm F/2.8 Di VC USD A009" }, // 2
{ 488, "Canon EF-S 15-85mm f/3.5-5.6 IS USM" },
{ 489, "Canon EF 70-300mm f/4-5.6L IS USM" },
{ 490, "Canon EF 8-15mm f/4L Fisheye USM" },
------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance
APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
Monitor end-to-end web transactions and take corrective actions now
Troubleshoot faster and improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
_______________________________________________
Darktable-users mailing list
Darktable-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/darktable-users
