So, I have this great new piece of technology. It's an extremely high resolution camera. It can capture a gazillion giga pixels. Moreover, it can capture nano-second exposures. It does however only record 2 levels for each sensel. Either fully black, or fully white.
I point it at the sun and snap a picture. I get a perfectly white circle in a sea of noise-free black. Ooh, I just captured a dynamic range of maybe more than 1000k to 1.
DxO gets their hands on the same piece of equipment. Does anybody have a clue what then will be their final judgement on dynamic range?