Lens (Tamron 18-270) not available in Lens correction menu

Hi all,

I only see some lenses to pick from in the lens correction menu. According to a list on the Adobe website, my lens (Tamron 18-270) should be included, but it is not.

I am using Lightroom 5 on a Win PC and a Sony Alpha 58 camera. Photos made as RAW.

Any idea where I can find or activate the lens?

Could it be, that the Sony camera does not write the lens information in the EXIF file so that Lightroom doesn`t know which lens I used? But if so, why can I pick several from different companies (Canon, ...) but not the one from Tamron?

Best regards,

Mick