high iso is for where people move - journalism and sports. model shots are low iso, because you use lighting anyway (natural or/and artificial) and the quality

high iso is for where people move - journalism and sports. model shots are low iso, because you use lighting anyway (natural or/and artificial) and the quality needs to be perfect. > This thing has massive 54x40 mm sensor VS current full frames because it's a medium format camera which by definition is bigger than full frame.