John Francis wrote: >Err - as far as I know there is no EXIF tag for this information >(which is why Pentax store it in a Pentax Private data field).
True, but Pentax Browser *calls* it EXIF and so does Adobe Bridge when you view a JPEG with this data intact. Yes, if you convert a PEF with Pentax Browser or Camera RAW, the resulting JPEG contains the lens data in a field that Bridge calls "Camera Data (Exif)".
