>>4089007Stacked sensor only means that there's ram glued to the back of the sensor for super fast read out speeds. It has nothing at all to do with sensor itself. Iso and dynamic range stay the same (in theory, there's one asterisk that I'll get to later. It effects burst rates, video bit rates, and rolling shutter performance. When manufacturers are spewing propaganda regarding new and improved stacked sensors, they're just doing marketing. Take a look at some studio scenes and compare result, it's not that hard to spot actual generational leaps as is the case of x-h2, or an old sensor with a new gimmick like x-h2s.
Now for the tricky part, having ram so close to the sensor, it effectively causes sensor to heat up more as opposed to naked sensor (unrelated, ibis also causes heat buildup), now this does effect dynamic range and noise. Differences can be even be substantial. For example, dedicated astro cameras use active cooling to achieve noticeably better performance on crop sensors compared to regular full frame dslr and mirrorless cameras. But here x-h2s has another trick, it can be actively cooled! I believe that this is the main reason behind people reporting higher noise from it and the others lower compared to x-t4.
