As I said yesterday, the lens correction doesn't apply itself to the RAW
just go shoot in RAW+ on any Pentax Camera with it turned on then compare
the JPEG to the RAW - only the Jpeg has been corrected.
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On 15 January 2018 at 13:51, Аl Воgnеr <darktable...@corr.eu.org> wrote:
> Am Mon, 15 Jan 2018 12:43:33 +0100
> schrieb Thomas Stieler <lens...@stieler.org>:
>
> > Hello!
> >
> > I'm considering to contribute correction data for some of my Pentax
> > lenses, which are not yet part of the lensfun database.
> > In the documentation on
> > http://wilson.bronger.org/lens_calibration_tuto rial/ there is the
> > following advice:
> >
> > Make sure that no corrections are applied by the camera (some models
> > do this even for RAWs)
> >
> > This raises a question for me:
> > If the lensfun databases contains the right correction parameters for
> > uncorrected RAW files, what whould happen to photos processed both in
> > camera and in Darktable, wouldn't the corrections be applied twice and
> > thus lead to overcompensated results?
> >
> > Or does Darktable handle RAW with or without in-camera corrections
> > differently?
> >
> > Best,
> > Thomas
> >
> > P.S. Maybe this doesn't apply to my camera (Pentax K-3), because I
> > don't know if the RAW files are modified by in-camera corrections, but
> > the question could still be relevant for others...
>
> Pentax firmware has some settings which _could_ apply to jpg-only, eg
> noise reduction, but I am not sure. IMHO the default settings should be
> used with RAW, because most people use this and do not deactivate /
> change special settings with every shot.
>
> So if a RAW has a correction already, this RAW should be the base for a
> lensfun correction, IMHO. Maybe there can be found a hint in the
> makernotes-metadata.
>
> Al
>
>
> F'up lensfun-users@lists.sourceforge.net ?
> CC: lensfun-users@lists.sourceforge.net
>
>
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