>>2923450By the way, pic related is how the D5500 looks at 25600 ISO. The A6300 is also almost as bad.
DXO's chosen "looks really good, don't worry about it" - style threshold (at least SNR of 30dB / dynamic range of 9 EVs / color depth of 18bits) is ~1440 ISO for both.
And my personal "okay enough with maybe some NR, I'll allow that" might be 6400 ISO. But definitely not 25600 ISO.