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. > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Lensfun-users mailing list > Lensfun-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lensfun-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Lensfun-users mailing list Lensfun-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lensfun-users
