[Digikam-users] Re: lens-recognition

[Gilles Caulier]

These information are managed in background by Exiv2 library, not Exiftool.

Use Exiv2 command line program and look which lens is reported (as
Exiftool).

Anyway, as i can see, there are more than one lens assigned for the same ID.
It's can be a problem

Gilles Caulier

2011/1/16 Michael Eschweiler <michael.eschweiler at web.de>

> Am Sonntag, 16. Januar 2011, 16:09:29 schrieb Michael Eschweiler:
> > Hi,
> > I've been using digikam since three years ago and with every version it's
> > improving - fantastic! As I am not a professional I don't use digikam
> every
> > day. Therefore it's a little bit difficult to date the following problem:
> > More or less since about two months ago digikam doesn't (import and)
> > expose the correct lens data.
> > With my EOS 40D I am using a Tokina zoom (f4, 12-24mm), a Tamron zoom
> > (f2.8, 17 - 50mm), and a Tamron zoom (f4-5.6, 28 - 300 mm).
> > With my older pictures I (still) find the lens type correctly displayed
> in
> > the exif data. This means the Tokina is identified as "12-24mm", the
> > smaller Tamron zoom as "17-50mm" and the telezoom as "28-300mm".
> > With the fotos I imported within the last two month I found that only the
> > telezoom is identified correctly, now more completely as "Tamron AF
> > 28-300mm" (not "28-300mm" as before). On the other hand the Tokina lens
> is
> > intentified as "Canon EF 20-35mm" and the 17-50mm-zoom gets a number:
> 161.
> > I suppose that it is a software-problem because when I open the same
> > picture with irfanview (Windows XP) the correct lens data are displayed.
> > What can I do in order to get the lenses correctly identified within
> > digikam.
> > Thanks in advance,
> > Michael
> > P.S.: Im using digikam 1.7.0 on openSuSE 11.3 - the x86_64 - Version with
> > KDE 4.5
>
>
> I just had a look a some pictures with exiftool: There I found some
> contradicting data:
> For the Tamron-17-50mm-zoom exiftools says:
> Lens Type : Canon EF 28-70mm f/2.8L or Sigma or Tamron Lens
> Long Focal                      : 17 mm
> Short Focal                     : 50 mm
> ..
> Lens          : 17.0 - 50.0 mm
> Lens ID      : Tamron AF 17-50mm f/2.8 Di-II LD Aspherical
>
> digikam gives back: 161
>
> For the the Tamron-28-300mm-zoom exiftools says:
> Lens Type   : Canon EF 28-200mm f/3.5-5.6 or Tamron Lens
> Long Focal                      : 28 mm
> Short Focal                     : 300 mm
> ..
> Lens      : 28.0 - 300.0 mm
> Lens ID  : Tamron AF 28-300mm f/3.5-6.3 XR Di VC LD Aspherical [IF] Macro
> Model A20
>
> here digikam displays the correct lens: Tamron AF 28-300mm f/3.5-6.3 XR Di
> VC
> LD Aspherical [IF] Macro Model A20
>
> And last but not least exiftool identifies the Tokina lens as:
> Lens Type                       : Canon EF 20-35mm f/3.5-4.5 USM or Tamron
> Lens
> Long Focal                      : 24 mm
> Short Focal                     : 12 mm
> ..
> Lens                            : 12.0 - 24.0 mm
> Lens ID                         : Unknown (160) 12-24mm
>
> in this case digikam tells me that I used a Canon EF 20-35mm.
>
> It seems to me that digikam is using different ways to handle the exif-data
> in
> order to determine the lens.
>
> Is there a way to persuade digikam to display the correct lens data?
> Thanks!
> Michael
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