In Lightroom 2015.5 and Lightroom 6.5, the EXIF Lens metadata field is hidden for some cameras.
Note: The metadata is still in the file, it's just hidden from display.
Use these steps to display the hidden lens metadata.
To verify that the Lens metadata is being displayed, expand the Metadata panel in Lightroom’s Library Module, choose EXIF from the panel header’s pop-up menu, and look for the Lens field, which will be populated with the correct Lens information for the selected file.
If you created virtual copies from files that were missing Lens metadata, use these steps to correct them, after you perform the above steps: