I've now looked around a little more inside files from the K10D (a DNG and a JPG, created at the same time using RAW+JPEG). Both the JPG and the RAW file contain Pentax Private Maker Note data (in an EXIF MakerNote tag in the JPG file, and in the DNG PrivateData tag in the DNG file), and in each case there is a tag (tag ID 63) containing the two-byte lens identification code.
I would expect that your Tamron lens is supplying the value '0 0', which will cause the "-- --" display; if you send me a (small) JPEG file I can check this. It's also possible that the lens is supplying a different code, but one that is not recognised by the Pentax software. One thing that puzzled me was the difference in behaviour noted between in-camera DNG Files produced by the K10D and DNG files created by the Adobe DNG converter from older PEFs. I now think I understand what is happening - although Pentax identify their MakerNote data with the prefix "AOC" (for Asahi Optical Company), the DNG PrivateData tag produced by the K10D instead uses the identifaction string "PENTAX ". This means that any software that know how to look around inside DNGs created from older PEFs (such as, for example, some of the Adobe products) will fail to recognise the K10D DNGs - instead of the expected ID string of "AOC" they will find the string "PENTAX ". Note that this name change only happens in the DNG files; the JPG files still uses the prefix string "AOC". I haven't looked at a PEF from the K10D, so I can't be sure which string it uses; my guess would be that it still uses the same tag structure as the in-camera JPEG, and hence will use the "AOC" identification. On Tue, Jan 02, 2007 at 03:42:04PM +0200, Boris Liberman wrote: > Hmmm, > > What Pentax software you're using? I mean Browser and Photo Lab? > > I have 3.0 that does not show Tamron lens data in the Browser while of > course other (Pentax) lenses do show fine. I shot some DNG + JPG. No > data was recorded in JPG either. > > Not that it bothers me too much, but it is kind of odd and illogical. > After all, being a programmer, I pay attention to this kind of detail. > > As as side note, it was very pleasant to receive an SMS from you on NY night. > > Cheers. > > On 1/2/07, Jostein ?ksne <[EMAIL PROTECTED]> wrote: > > Boris, > > > > That's odd. I just checked with my installation and a fresh DNG, and > > lens data are recorded. Even for the Sigma EX 70-200. > > > > Are any data recorded in PEF or JPG`? > > > > Btw, I got the same problem when installing the v3.10 from the Pentax > > web site. The software on the K10D CD has the same version number, but > > it's not the same. > > > > Jostein > > > > On 12/29/06, Boris Liberman <[EMAIL PROTECTED]> wrote: > > > Hi! > > > > > > Well, George, I hear what you're saying. I just installed Pentax > > > Software from the CD that came with the camera. None of my DNG files > > > displays the lens name in the browser. It displays "-- --" sign > > > obviously meaning that it wasn't recorded. > > > > > > I may have to shoot some PEFs just because so that I could see if my > > > Tamron and K10D are talking between themselves the same language. > > > > > > Thanks. > > > > > > Boris > > > > > > -- > > > PDML Pentax-Discuss Mail List > > > PDML@pdml.net > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > > -- > > PDML Pentax-Discuss Mail List > > PDML@pdml.net > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > -- > Boris > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
