How many bits are the raw DNG files produced by J2R? I am guessing 14bit…?
The EXIF says “Bits per sample 16 16 16” for the full resolution image, but that is simply TIFF specifications … most RAW images (camera) contain 14bit but hold more information that a 16bit TIFF.
So you would need to ask the maker …
I am told 16-bit