lens-recognition
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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 _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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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 _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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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 <[hidden email]> Am Sonntag, 16. Januar 2011, 16:09:29 schrieb Michael Eschweiler: _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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Hi Gilles,
Thanks for the information. > Use Exiv2 command line program and look which lens is reported (as > Exiftool). Ok - I tried exiv2 - and it gives back the information which are in digikam. > Anyway, as i can see, there are more than one lens assigned for the same > ID. Where did you see this? exiv2 for example gives back Exif.CanonCs.LensType Short 1 Canon EF 20-35mm f/3.5-4.5 USM Exif.CanonCs.Lens Short 3 12.0 - 24.0 mm This means wrong lens with LensType but correct focal length, but I couldn't see more than one lens... Now, after controlling once more the data in digikam I found something interesting: With older fotos in the properties part I find lens: 12 - 24mm in the meta data part digikam tells me lens: 12 - 24mm lenstype: Canon EF 20 - 35mm f/3.5-4.5 USM the properties of newer fotos says lens : Canon EF 20 - 35mm f/3.5-4.5 USM whereas the meta data remain the same as in older fotos lens: 12 - 24mm lenstype: Canon EF 20 - 35mm f/3.5-4.5 USM Could it be that the importing routine of digikam slightly changed so that for the lens in properties digikam now uses the exif-value 'lenstype' instead of the the exif-value 'lens'? Michael > > 2011/1/16 Michael Eschweiler <[hidden email]> > > > 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 > > _______________________________________________ > > Digikam-users mailing list > > [hidden email] > > https://mail.kde.org/mailman/listinfo/digikam-users _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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