i am still looking for the best coordinate system settings. The results should be in the ETRS 89/ UTM zone 33 coordinate system (EPSG: 25833) with heights in the official german height coordinate system DHHN2016 (EPSG: 7837). I even get uncertain about the image coordinate system settings (EPSG 4326) for images taken by the DJI Phantom 4 Pro. The main question is, if it is useful/recommended/necessary to use the geoid heights above the ellipsoid? You can have a look at my current settings below.
I am grateful for every hint!