Apologies if this has been discussed before, but nothing came up in my search.
Having metadata fields for film stock and the original equipment used etc. is a welcome addition. I am now looking for a way to fill those fields with data logged on my phone without too much manual work. There is an application for Android devices called Exif Notes (https://play.google.com/store/apps/details?id=com.tommihirvonen.exifnotes) which I use to log data about each film and frame. It does require me to take my phone out after each exposure, which can be annoying, but I do like the benefit of knowing where, when and how my photos came to be.
I know there is exiftool to modify the EXIF data of RAW files, but can it see the NLP-specific fields? I also stumbled across the Lightroom plugin Capture Time to Exif (https://www.photographers-toolbox.com/products/jbeardsworth/jbcapturetimetoexif/index.php?sec=main) which does more than its name suggests and provides a decent interface for importing EXIF data into Lightroom, but seems to only be able to see fields that are native to Lightroom.
Worst case I will copy and paste the data into Lightroom, but if anyone has an idea on how to accomplish this in a less manual way, I would greatly appreciate it.