-1- The histogram can support beyond 255 (8 bits). -2- The ability to load some raw files () is also present in the FITS viewer but at the moment some are loaded only up to 255 bits. I am looking into this but am probably not able to fix it. See:
const QStringList RAWFormats = { "cr2", "cr3", "crw", "nef", "raf", "dng", "arw", "orf" };