On Sun, 2013-09-29 at 10:08 +0200, Torsten Bronger wrote: > Hallöchen! > > Leonard Evens writes: > > > [...] > > > > Another confusing thing: The file for nikon in /usr/share/lensfun > > doesn't contain an entry for the 24-70 mm lens but it does show one for > > the 70-200 mm lens. Yet neither shows up in darktable. Where is > > darktable looking for the lens correction data? > > The data for the 24-70 is too new. You would have to copy'n'paste > the entry from > http://svn.berlios.de/wsvn/lensfun/trunk/data/db/slr-nikon.xml > > And the data for the 70-200 was made with an APS-C sensor. LensFun > refuses to extrapolate this on full frame. You will have to > calibrate yourself.
Thank you much. I downloaded that file and installed it in /usr/share/lensfun, and now the distortion module in darktable finds it. (I suppose I could have put it elsewhere as a local file in my directory, but this was simplest.) I now understand why the 70-200 mm lens doesn't show up in darktable, and I know how to produce calibration information for it and what to do with the results. But there is no great hurry for me to do that since I use the 24-70 mm lens 90 percent of the time. Also, the 70-200 mm lens has very little distortion. Due to your help, I am beginning to understand how this works, so thanks again. > > Tschö, > Torsten. > -- Leonard Evens [email protected] Professor Emeritus, Department of Mathematics, Northwestern University ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
