For most of the cameras I've tried, I either get values like 0.6 or 600 (which I divide by 1000).
However, I have a DNG where I get: INFO: cam_mul 0.001000 1127039.874999 0.004999 0
Raw Therapee seems to load the file just fine though. And so does IrfanView.
Any ideas what's wrong, or what I should do?