Incorrect LensID to Name mapping

[zimu]

Hi, looks like there a conflicting lens mapping for LensID 253:

"EXIF:LensInfo"=>"70-300mm f/4-5.6", "EXIF:LensModel"=>"70.0-300.0 mm f/4.0-5.6", "XMP:Lens"=>"70.0-300.0 mm f/4.0-5.6", "XMP:LensID"=>253, ...
"Composite:LensID"=>"Sigma 50-150mm F2.8 EX APO DC HSM II + 1.4x"

The actual lens is Tamaron 70-300mm f/4-5.6

Please let me know if you need a sample file.

[Phil Harvey]

It is difficult to properly identify Nikon lenses after Photoshop has destroyed the metadata.

What does exiftool show for LensID on an original (non-Photoshopped) image with this lens?

- Phil

[zimu]

Sorry, I don't own the pre-photoshop file, as it's a photo uploaded by our users in 500px.com.  I could try to reach out to the user and ask for it.

Could you elaborate a bit more about "It is difficult to properly identify Nikon lenses after Photoshop has destroyed the metadata"?  Does that mean we should not trust "Composite:LensID" after photoshop, and should relay on either "EXIF:LensModel" or "XMP:Lens".  Also curious if Adobe Lightroom will have negative impact on metadata too?

Thanks!

[Phil Harvey]

Photoshop wipes out all maker note information, and saves only the lens ID, but ExifTool uses many other tags to uniquely identify a Nikon lens.  However, there is currently only 1 lens defined for ID 253,  so I should add support for this Tamron lens, but to do this I need the output of LensID from an original image.

- Phil