>>3777831This is the arri chart again, and it's not based in reality, here's some actual results from testing an Alexa.
As you can see, move away from base iso (800) and you lose dynamic range.
Also, ei is post ADC, and not the same as iso. If the dynamic range in the above chart was limited artificially to 13 stops, it could use all of those exposure values without changing the dynamic range from scene to scene, this is important in film making, but a limitation in photography.
Also, why do you keep bringing up a video camera test chart that's been explained to you is inaccurate on multiple occasions, instead of using any of the data for photography cameras which clearly shows that dynamic range drops as you move away from base iso at 1 stop per stop?
If you increase iso on a photography camera, you don't gain anything, there's no extra detail in the highlights, you typically just lose a stop of shadow recovery. Video cameras have fixed shutter speeds, so adjusting EV and iso is the only control over exposure you have, presuming your aperture is chosen for artistic reasons in the shot.
Now there's no reason to be wilfully ignorant anymore anon :)
