Gh5s dual native iso is 160 to 5 1200 (which can be extended to 80 to 204800). According to relevant public information, gh5s has dual native built-in120,000 pixel M4/3 LiveCMOS, no low-pass filter, venuse engine 10 image processor, dual native iso technology, iso 160 to 5 1200 (which can be extended to 80 to 204,800).