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

Same here!

Any fixes planned Apple?

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

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.

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

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

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

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

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! 😀

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

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

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

Ernie