Found this in the Gmail "never forget" cache ... It was one of two messages I posted on this subject. The other talked about stripping the current lens name data out and then inserting whichever current data LR will display.
I don't have any current Pentax camera PEF files to work on for testing ... don't know whether you capture as DNG or RAW format. I converted all my older .PEF files to .DNG. G On Fri, Dec 30, 2011 at 12:41 PM, Godfrey DiGiorgi <[email protected]> wrote: > There's no hack required, but you can't do it inside LR. You need EXIFtool > to do it properly. > > If you've already imported the files into LR and/or done any annotation or > processing, here's the procedure I use: > > Inside Lr: > > - find and select all the exposures that need to be updated to reflect a > specific lens name > - group them into a subfolder* > - save metadata to the files > - quit LR > > * Depending on how you organize the image files on disk, this can be more or > less complicated to do and then restore the files to their original > locations. If you let LR organize files into a date-hierarchy by folder, > it's usually easier to group all the files in a particular date folder into > a subfolder and just do the operation several times than trying to put them > all in one subfolder and then later restore them to several folders. Think > first ... ;-) > > With a command line: > > - set directory to the folder where the files are > - pick one file and run EXIFtool on it (use the -s -s options for a simple > token-value list) outputting to a text file > - search the text file for tokens that include the word "lens". Cameras > differ in how they output lens name information. You usually find "lensid" > or "lensname". Sometimes you find none. > - say you found "lensname". run EXIFtool with the option to write a new > "lensname" value, that is > exiftool -LensName="Tokina ATX Pro 28-70mm f/2.6-2.8" P0001234.pef > - EXIFtool will add this token-value to a new copy of the file (if I got the > command right off the top of my head... :-) and save the original as > "P0001234.pef_original". > > - Start Lightroom > - Select all the files you updated the lensname on > - Use the "Metadata > Read Metadata from files" command > - check the files' EXIF data: If the modification was successful, all the > files will now show the proper lens name data. > - presuming success, move the files back to their original folder > - remove the temporary subfolder from Lightroom > - quit Lightroom > > - outside of Lightroom, delete the subfolder and all the "_original" file > copies. > > It's a little tedious, but I do it all the time ... particularly when I'm > shooting film and scanning the results into a DNG encapsulated TIFF file ... > so that I have lens name, focal length, and maximum aperture information in > LR. > > G > > On Friday, December 30, 2011, Igor Roshchin <[email protected]> wrote: >> >> Hi All, >> >> I wonder if it is possible to correct the lens information in the LR >> database? >> Some of the 3rd party lenses are recognized by LR as an incorrect Pentax >> lens. E.g. my Tokina ATX Pro 28-70/2.6-2.8 is recognized as >> Pentax-F 28-80/3.5-4.5. I don't know why Tokina encoded the information >> for this lense in duplication to the Pentax lens, but that's what it is. >> Since I don't have that Pentax lens (and unlikely to get it in the >> future), I'd rather replace the lens definition in the LR. >> >> Does anybody know if there is a hack available somewhere - to accomplish >> this? >> >> Thank you, >> >> Igor >> >> >> -- >> 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. >> -- Godfrey godfreydigiorgi.posterous.com -- 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.
