>>3938336>>3938337>iT's PixEl SiZewrong, otherwise a sony a7riv would have significantly less dynamic range than a sony a7iii.
As it happens, when you measure DR (and therefore SNR) A7Riv and A7III are almost identical, yet if you take an aps-c crop from a full frame shot, you lose a stop of dynamic range.
I'm sorry you can't wrap your pea brain around this.