Just to clarify as a Pentax owner I can clarify - lens correction only
applies to the JPEG not the RAW.
Sometimes I shoot RAW+ with lens correction on just so I can compare how
good the profile is vs the manufacturer collection.
With Pentax RAW is RAW.
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On 15 January 2018 at 12:17, Roman Lebedev <lebedev...@gmail.com> wrote:
> On Mon, Jan 15, 2018 at 2:43 PM, Thomas Stieler <lens...@stieler.org>
> wrote:
> > 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_tutorial/
> > 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:
> Hm, does Pentax also does that, like Sony?
>
> > 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?
> In dt there is no special handling for that. So yes, if raws are not
> actually raws, but partially corrected, then they will be corrected again,
> if you have actually told dt to do that (the corrections are selectable)
>
> TBN, at most we would adjust defaults based on the flag. We would not
> straight up disable any particular correction just because the file
> seems to indicate that the correction has already been applied.
>
> But this is the wrong list for that i think..
>
> > 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...
> >
> > --
> >
> > Thomas Stieler <lens...@stieler.org>
> Roman.
>
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> >
>
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