Pictures taken with Nikon D7500 in RAW, with cap, shutter speed 10s and different ISO levels. With gamma levels put to the most extreem (to zero) we can see noise showing up as from ISO 6400. Also other reviews show noise coming up around ISO 6400.
Dynamic range drops significantly as from ISO 51200 but EV levels are below 6. ISO 12800 has EV level 6.6 which is exactly 50% of the max. EV level (ISO50).
