I own a Pentax camera which is capable of producing DNG-Files. Unfortunately i had left the "convert raw files to dng"-option enabled when importing which converted all my DNG files to DNG files but deleting Makernotes in the process so that all the new DNGs now have missing lens information. I think a warning when trying to convert from DNG to DNG would be a good idea (maybe mentioning the possible loss of metadata) as this took me quite some time to track down (at first i thought that the camera did no longer encode the lens used, then i realised that the information was there in the jpeg files but not the dng ones and finally i realised that i had left the conversion option enabled).
Git commit 7d418a828f9fbd61262908f80476dffd694c0b78 by Maik Qualmann. Committed on 01/10/2017 at 09:38. Pushed by mqualmann into branch 'master'. skipped convert to DNG if file suffix already DNG FIXED-IN: 5.8.0 M +2 -1 NEWS M +29 -19 utilities/importui/backend/cameracontroller.cpp https://commits.kde.org/digikam/7d418a828f9fbd61262908f80476dffd694c0b78