Lightroom/Camera Raw: Tokina 19-35mm F3.5-F4.5 (193) detected as Pentax-F 35-70mm F3.5-F4.5 on Pentax K1

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  • Problem
  • Updated 2 months ago
  • Acknowledged
  • (Edited)
Tokina 19-35mm F3.5-F4.5 (193) detected as Pentax-F 35-70mm F3.5-F4.5 on Pentax K1 in Lightroom.

When using Rawtherapee, it is able to correctly detect the lens as a Tokina 19-35 F3.5-F4.5.
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Boris Kaganovich

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Posted 2 months ago

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Chris Castleberry, Camera Raw Engineer

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Hello,

Please post a sample raw file made with this lens (DropBox or similar) and provide download link and I will be happy to investigate on our end.

Thanks,

- Chris
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Boris Kaganovich

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Hi Chris.  Thank you for your help.

Link to RAW file here:  https://drive.google.com/file/d/1b12F4qJQwtxx34R-yfkeRPxWMuelV_Jo/view?usp=sharing

It appears users of the Tokina 20-35 F3.5-F4.5 are having this issue as well:

https://www.pentaxforums.com/userreviews/tokina-af-235-3-5-4-5-20-35mm-version-ii.html

Regards,
Boris
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Boris Kaganovich

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Also, if needed, I have the Pentax-F 35mm-70mm F3.5-F4.5 lens for testing.
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Chris Castleberry, Camera Raw Engineer

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Thanks, Boris.

Looks like this might be an older Pentax lens model, and Camera Raw/Lightroom does not have a dedicated lens profile for it. There is also no official Adobe profile for the Tokina 20-35mm so it's likely that you might have a 3rd party profile(s) that contains metadata that is causing the lens profile matching logic in the software to think the Pentax lens matches the Tokina profile.

Do you have a copy of a lens profile for the Pentax lens, and perhaps one for the Tokina 20-35 as well?

If so, I might be able to modify them to make the matching work.

Regards,

- Chris
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Boris Kaganovich

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Interestingly enough, Darktable has the same detection issue as Lightroom, also detecting the lens as the Pentax-F 35mm-70mm F3.5-F4.5.  Also, when testing with Affinity Photo, it is also detected properly as the Tokina 19-35mm F3.5-F4.5 AF.

Do you suspect that this could be an Exif issue, rather than a lens profile issue?

Using LensTagger, I'm able to manually change the Exif data to make it show as Tokina, but it would be nice to not have to take that manual step:  https://www.lenstagger.com
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Chris Castleberry, Camera Raw Engineer

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I see what you mean now. Yes, the EXIF lens name is being overwritten in Lightroom and I understand why.

There is some internal code which looks up Pentax lens names via ID, and overwrites the EXIF lens name to accommodate a lens profile that might use that as the "Lens" metadata name in the profile. In the case of the Pentax 35-70 lens, the ID is "3 28" which is also used by 2 different Tokina lenses. Lightroom is giving priority to the native Pentax lens.

see: https://sno.phy.queensu.ca/~phil/exiftool/TagNames/Pentax.html for the lens IDs at "3 28."

It might be possible for us to fix this in a future release, so I will add a bug and see if I can find a reasonable solution.

Thanks for your patience.

- Chris
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Boris Kaganovich

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Thanks for your help Chris.

In the meantime, I'll keep on LensTagger'ing.

Thanks,
Boris