Aperture 3.6 recognises Tamron 70-200 f2.8 lens as Sigma 24-105 f/4

Question

Level 1

22 points

Aperture 3.6 recognises Tamron 70-200 f2.8 lens as Sigma 24-105 f/4

I have been using the Tamron 70-200 F2.8 VC Di lens for over a year, along with Aperture 3, which correctly identified the lens in its metadata tag. However, in the past few weeks, I notice that this lens is represented as Sigma A 24- 105 f/4 lens. All other data is correct, e.g. focal length of image, aperture, ISO etc.

Not sure why this is happening, any clues on how to rectify this?

iMac, OS X Mavericks (10.9.3), 21 in, 8GB RAM, i5Core Intel,

Posted on Dec 22, 2014 10:16 PM

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Answer 1

léonie

Level 10

200,645 points

Dec 22, 2014 11:54 PM in response to hibhaven

The EXIF tags set by the cameras are not unique. The manufacturers are using their own codes, and that may be ambiguous. In case of a conflict, Aperture will use one of the possibilities. There have been several reports about incorrectly identified lenses.

Not sure why this is happening, any clues on how to rectify this?

Did you update any software recently, for example update the RAW support?

Send a bug report to Apple, and report the wrong tag. You can use the feedback form: Apple - Aperture - Feedback

The only other alternative would be to use exiftool to change the EXIF tags of the originals. (Modifying EXIF tags of Originals Using exiftool: camera, lens, gps) But before going to that trouble, I'd wait, if Apple will fix the bug with the next RAW support update.

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Answer 2

hibhaven Author

Level 1

22 points

Mar 10, 2015 8:19 AM in response to léonie

Thanks Leonie. After going through my previous photos in Aperture, I noticed that all old pics also show the lens EXIF data incorrectly. I dont know if the EXIF data has been updated to reflect the incorrect information (probably as part of an OS X update!!). And with Aperture being phased out, I doubt Apple will provide any update to resolve this.

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