Actually, I just ran exiftool on a prestine DNG file. ( exiftool -a -u -g1 FILENAME )
It shows: under section ---- Pentax ---- Lens Type : PENTAX-F 28-80mm F3.5-4.5 or Sigma or Tokina L ens (actually twice in the same section) But then, at the bottom, under section ---- Composite ---- It has: Lens ID : Tokina AT-X PRO 28-70mm F2.6-2.8 Looking into the code of exiftool ( file site_perl/5.8.9/Image/ExifTool/TagNames.pod as noted: <Image::ExifTool::TagNames/Pentax Tags> ), I found that "Composite" tags is something that exiftools calculates based on the decoded tags. I didn't look deeper into the code, but I suspect that exiftool may go a step further to distinguish which of the 3 lenses it is. This would be done probably on such information in EXIF MakerNotes as "AE Max Aperture", "Min Aperture", "Lens F Stops", "Nominal Max Aperture", "Nominal Min Aperture", etc. - These are different for the 3 lenses. I guess, LR is just not as smart as exiftool is. (I just submitted what I think is a feature request on feedback.photoshop.com.) Igor > Date: Thu, 5 Jan 2012 13:21:23 -0500 (EST) > From: Igor Roshchin > > > Thank Jostein, > > I'll try it, - maybe it will work. > My feeling is that the actual code conversion is built in into LR, > and it doesn't consult the .lcp file for that, but only uses > the .lcp file to match the lens and apply adjustments for it. > > The list of the lenses is definitely helpful. > Here is where the "collision" occurs for me: > > '3 29' = PENTAX-F 28-80mm F3.5-4.5 or Sigma or Tokina Lens > '3 29.1' = Sigma AF 18-125mm F3.5-5.6 DC > '3 29.2' = Tokina AT-X PRO 28-70mm F2.6-2.8 > > It is weird that there are two (!) values corresponding > to the same lenses: > '3 27' = smc PENTAX-F 28-80mm F3.5-4.5 or Tokina Lens > '3 27.1' = Tokina AT-X Pro AF 28-70mm F2.6-2.8 > > I wonder if the decimal values are actually in the Exif. > (I don't know if exiftool actually parses "Makernotes" part of > the EXIF, and also whether it can work on DNG files.) > > As for exiftools solutiona as describe on the Leica forum, - > I suspect it is only applicable for the JPEGs, and not for > the RAW files: the fields that are being replaced are not in the > Makernotes, but in the EXIF parts generated by the converter (LR). > > > Thank you, Jostein for the your interesting thoughts and insightful > information. > > Igor > > > > Tue Jan 3 03:54:54 EST 2012 > AlunFoto wrote: > > The lens name is not spelled out in letters inside the image file. > It is represented by a numerical code residing in the MakerNotes part > of the EXIF. > There is a list of codes mapped to names at Phil Harvey's webpages > (ExifTools): > http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Pentax.html#LensType > > My hope was that Lightroom could be coaxed to map a code to a different > name by providing a lens profile mapping the number to a Tokina name. I > imagined you wouldn't have to rename the file or create a separate Tokina > folder for it as long as it maps to the name you want for it. > > The problem of overlapping codes is not unique to Pentax/Tokina, btw. > Here's one thread that indicates an issue with Canon/Tamron: > http://www.canonrumors.com/forum/index.php?topic=649.15 > > It could be that your best solution is to use ExifTools directly. Some way > down this page there is a recipe for changing lens names for Leica files. > Should work for Pentax too, I think. > http://www.l-camera-forum.com/leica-forum/digital-post-processing-forum/135236-changing-lens-info-exif.html > > Hope it can be of some help. > Jostein > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
