I ran into a strange problem today while "testing" a refurbished Nikon D750.
The NEF file contains the proper lens ID (85mm/1.8 or 28mm/1.8 of 24-70mm,,,etc) but all that appears in Lightroom CC 2015.5 is the focal length at the time the shot was taken. The Lens" entry does not even appear in the Library Metadata. If I display the Metadata on the camera LDCD screen the Lens ID information is present.
Also, when I open the NEF files in the Mac OSX Preview application the Lens ID information is present. The Lens ID is also present if I open an existing Catalog containg D700 or D800 NEF files.
The above problem is present even when I don't choose a special prefix (_D7C or _D8C, etc.).
Another oditiy is if I import Nikon 1 V2 or V3 files into the new catalog the Lens ID information is present.
I think I have found a bug in the Import software. Have any of you experienced this problem?