no exif lens tag for DNG files (after conversion from from Panasonic RW2 format)
I'm using a Panasonic DMC-G3 camera. After conversion from RW2 to DNG (Adobe RAW Converter), as required for my my workflow, lens tags are lost. Original Panasonic MakerNotes are not readable in DNG but lens info exists mapped to exif tag "Exif.Photo.LensModel". I've prepared a patch wich solved this problem and thus allows lens correction. If no lens data can be found it could be convenient searching for "Exif.Photo.LensModel".
May be this problem is related to bug #8813.