I did write up that I do this on regular occasion with raw files, right?

G

On Thu, Jan 5, 2012 at 10:21 AM, Igor Roshchin <[email protected]> wrote:
>
> 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
>
>
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Godfrey
  godfreydigiorgi.posterous.com

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