[wim]

I have seen you write that before, but it remains (mostly) incorrect.
The main reason Sony has higher DR in RAW is not because they filter noise, it is because of how/where the signals get amplified. They simply have lower read out noise.

Canon has caught up with that somewhat (see 5D mk IV, EOS R for instance). And the Canon 1D X mk III does better (DR wise at base ISO) than the Nikon D6 and Sony A9 II.

The high DR is in low ISO, not in high ISO with NR.

That with some cameras/some camera settings noise gets filtered out at low light/long exposure/high ISO settings has nothing at all to do with high DR in low ISO setting RAWS.

"(mostly) incorrect" is debatable obviously.

Yes, Sony and Nikon read out is structured differently at the hardware level, and therefore generates less readout noise, I am aware of that. However, the processing in hardware is different too, resulting in files that look cleaner and appear to have lower noise levels, but lose some detail caused mostly by the in-hardware algorithms used.

The articles I mentioned were scientific papers, in which the sensors and electronics were taken apart and measurements were done at different output levels of the hardware itself. As to the starry sky shots: that was just an example (and done properly, they should be done at base iso). Star shots should be done with NR off as well.

Regards, Wim