Depending needs , may find results produced camera quite usable , ISO12800.However , ISO25600 , 'd likely want avoid setting.The camera excellent job maintaining colour saturation , even ISO speed increased.Dynamic range reduced lowest ISO speed ISO80 , standard ISO range ISO160 ISO12800.ISO figure noise starts become visible : ISO3200 ISO figure noise overwhelms image : ISO25600 Interested ? Help support ePHOTOzine using links.Amazon UK Amazon US Fujifilm X-Pro3 The Fujifilm X-Pro 3 offers unique shooting experience , one ’ designed appeal every photographer.In fact , ’ always giving rangefinder experience , X-Pro 3 continues this.Under ISO160 , camera using extended , Low ISO range , dynamic range captured lower normal.As X-T3 X-T30 , noise performance excellent , low levels noise , even higher ISO speeds , camera maintains detail colour saturation even using higher ISO settings .