Dynamic Range of EOS R Sensor

[AlanF]

Bill Claff has just posted on photonstophotos.net measurements of the DR vs iso of the EOS R. Guess how it compares to the 5DIV sensor http://www.photonstophotos.net/Charts/PDR.htm#Canon EOS 5D Mark IV,Canon EOS R

 

[Don Haines]

It’s as if they were limited by physics

 

[Jethro]

Interesting that you also get a virtually identical chart compared to the 1DX mkii. I'm probably showing my ignorance, but is that where the 5D4 sensor came from?