Andreas Straub

Q: My New Tamron 24-70 / 2.8 VC identifies as a Sigma Lens!

Hi,

 

the Titel says it all. Use lates Version of Aperture 3.4.

MacBook Pro, PowerMac G5 Dual, Mac OS X (10.5.6)

Posted on Oct 13, 2012 11:49 AM

Close

Q: My New Tamron 24-70 / 2.8 VC identifies as a Sigma Lens!

  • All replies
  • Helpful answers

  • by martijnVDE,

    martijnVDE martijnVDE Dec 21, 2012 2:12 AM in response to Andreas Straub
    Level 1 (0 points)
    Dec 21, 2012 2:12 AM in response to Andreas Straub

    Same here!

     

    Any fixes planned Apple?

  • by léonie,

    léonie léonie Dec 21, 2012 5:12 AM in response to martijnVDE
    Level 10 (105,690 points)
    iLife
    Dec 21, 2012 5:12 AM in response to martijnVDE

    You could try to correct the lens EXIF tag using exiftool, see my user tip here:

                     Modifying EXIF tags of Originals Using exiftool: camera, lens, gps

     

    Regards

    Léonie

  • by noergelberni,

    noergelberni noergelberni Jul 9, 2013 2:45 AM in response to Andreas Straub
    Level 1 (0 points)
    Jul 9, 2013 2:45 AM in response to Andreas Straub

    Now, more than half a year later, the situation is the same. I was also surprised to find my Tamron 24-70 photos registered for the Sigma lens.

     

    Yesterday my Tamron 70-300 mm arrived and - surprise - that lens is correctly registered.

     

    I would expect to have the opportunity to configure Aperture to solve this problem.

  • by Ernie Stamper,

    Ernie Stamper Ernie Stamper Jul 9, 2013 8:55 AM in response to noergelberni
    Level 8 (37,588 points)
    Video
    Jul 9, 2013 8:55 AM in response to noergelberni

    Reviewing this topic, and checking photos with apps other than Aperture, I do not understand why this is an Aperture problem?  With my full frame Tamron 28-75 f2.8, all the lens identification info seen later in Aperture is contained with the photo on the memory card, before any import.  Why would we think Aperture is changing that?

     

    If you check a photo made with each of these lenses with, say Graphic Converter, then with ExifTool tab of info, you can see what is said to be the identity of each lens.

     

    Ernie

  • by noergelberni,

    noergelberni noergelberni Jul 9, 2013 9:28 AM in response to Ernie Stamper
    Level 1 (0 points)
    Jul 9, 2013 9:28 AM in response to Ernie Stamper

    Hi Ernie,

     

    thanks for that hint. So here are my results of further investigation. The Exiftool mentioned by Léonie above already reports this:

     

    Lens Type                       : Canon EF 85mm f/1.2L or Sigma or Tamron Lens

    Lens                            : 24.0 - 70.0 mm

    Lens ID                         : Sigma 24-70mm f/2.8 IF EX DG HSM or Tamron SP 24-70mm f/2.8 Di VC USD

    Scale Factor To 35 mm Equivalent: 1.0

     

    You are absolutely right - this is not a problem with Aperture. And its funny enough to find out, who (Canon, Sigma, Tamron) could fix it.

     

    Bernd


  • by Ernie Stamper,

    Ernie Stamper Ernie Stamper Jul 9, 2013 9:34 AM in response to noergelberni
    Level 8 (37,588 points)
    Video
    Jul 9, 2013 9:34 AM in response to noergelberni

    Could you take a photo with this camera and lens, in JPEG (for ease of email)  and email it to me?  I would like to look at the info via Graphic Converter.  My address can be found by clicking on my name to the right, and looking in the bio line of the resulting Profile.

     

    I assume this is a Canon camera?  I suppose it is the camer that must write the data, and thus it must choose how to identify?

     

    Ernie

  • by Ernie Stamper,

    Ernie Stamper Ernie Stamper Jul 9, 2013 10:12 AM in response to Ernie Stamper
    Level 8 (37,588 points)
    Video
    Jul 9, 2013 10:12 AM in response to Ernie Stamper

    Thanks for sending the sample.  Per observation with the ExifTool in Graphic Converter, the following is reported:

     

    Sigma 24-70mm f/2.8 IF EX DG HSM or Tamron SP 24-70mm f/2.8 Di VC USD

     

    No speculation of it being a Canon lens, however.

     

    Since Sigma listing is first, I assume Aperture is picking up that one only.

     

    Ernie

  • by léonie,

    léonie léonie Jul 9, 2013 10:18 AM in response to Ernie Stamper
    Level 10 (105,690 points)
    iLife
    Jul 9, 2013 10:18 AM in response to Ernie Stamper

    Since Sigma listing is first, I assume Aperture is picking up that one only.

    Nice catch, Ernie. That is the easy way out - how disappointing for a Pro app!

  • by Ernie Stamper,

    Ernie Stamper Ernie Stamper Jul 9, 2013 10:40 AM in response to léonie
    Level 8 (37,588 points)
    Video
    Jul 9, 2013 10:40 AM in response to léonie

    Leonie,

     

    I could say why can't a Pro camera make up its mind what to write in the EXIF -- but then I use Nikons

     

    On the serious side, some other lens have lengthier descriptions than this total, so wondering if the "or" becomes some sort of delimiter?

     

    Ernie

  • by léonie,

    léonie léonie Jul 9, 2013 11:03 AM in response to Ernie Stamper
    Level 10 (105,690 points)
    iLife
    Jul 9, 2013 11:03 AM in response to Ernie Stamper

    Ernie,

     

    I could say why can't a Pro camera make up its mind what to write in the EXIF -- but then I use Nikons

    I think the EXIF entries are just a numerical code, and I suspect the codes for "Sigma 24-70mm f/2.8 IF EX DG HSM or Tamron SP 24-70mm f/2.8 Di VC USD"  are the same, so Aperture has to throw a dice how to interpret the number. 

     

    Probably it will look at the camera, and then take the camera maker's list of tags. For a Canon Camera it would find this:

     

    http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Canon.html

  • by Ernie Stamper,

    Ernie Stamper Ernie Stamper Jul 9, 2013 11:22 AM in response to léonie
    Level 8 (37,588 points)
    Video
    Jul 9, 2013 11:22 AM in response to léonie

    So we can note that the camera tags create the confusions, since many of the description in that list contain the "or".

     

    Ernie