One of my prime lenses is non-electronic and so the photos EXIF data does not include any lens information. These show up in Lightroom 4.3 as "Unknown".
I see no way through Lightroom to add this lens name, focal length, etc. The photos are spread across folders, so doing it manually with an EXIF like this one will not work http://www.sno.phy.queensu.ca/~phil/exiftool/
Does anyone know if this is possible?