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 ------------------------------------------------------------------------------ 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
