Originally Posted by ckuwajima
I guess the conversion to DNG is mostly ok, but there may be proprietary information embedded in RAW that can not be readily mapped to DNG format. The new Canon EOS 5D IV dual pixel RAW is an example.
I don't know anything about how raw numbers and file format are affected by dual pixel raw. Time will tell.
However metadata information may be lost. LR and other platforms choose to display many of the metadata parameters. For instance Fujifilm raw contains metadata describing if the electronic or mechanical shutter was used. This information is not displayed in LR. I don't know if the DNG conversion throws it away or just keeps it.
Nikon raw has many proprietary parameters that only Nikon's raw rendering software could use. Adobe has to analyze new camera data streams and lenses and create their own metadata. I have no idea if Nikon still uses proprietary metadata since the last time I touched a Nikon camera was about a month after the Fujinon 10-24/4 zoom lens first appeared in the US market..