Being a Silverfast user, and given the fact I’m scanning old, seemingly perpetually dusty and oftentimes damaged negatives, I’ve been using the TIFF output from Silverfast after applying dust removal. I would prefer to have DNG as the file type for my master archival files as I tend to convert my camera RAWs to DNG upon import into Lightroom so that would keep things uniform. When I import the TIFF into Lightroom I am unable to automatically convert to DNG as it’s not a camera RAW, but I have found that I can export the TIFF to DNG and then use NLP to convert that DNG as if it was a Silverfast DNG and get very good results. Furthermore, when I export the Silverfast TIFF to DNG the file size goes from ~120mb to ~85mb, another bonus.
My question is whether I’m losing data/pixels/editability by converting this TIFF file to a DNG in this manner. I read somewhere that by converting a TIFF to a DNG you make a “linear DNG” which is not inherently the same as a RAW file and you therefore lose the original editability of the file… I’m not knowledgeable enough about this to know what this means or if that is what I’m doing, but I do know that my end goal is to have files as close to RAW that remain as editable as possible for long term archival purposes. If I can keep things all DNG and save about 30% of disk space in the process, even better.