A satisfactory result.ISO figure noise starts become visible : ISO6400 ISO figure noise overwhelms image : ISO25600 Interested ? Help support ePHOTOzine using links.Amazon UK Amazon US Olympus OM-D E-M1 III Fine detail starts drop ISO1600 / ISO3200 default settings.There options adjust Noise Filter , photos taken default setting `` Standard '' .If want slightly sharper images n't mind little bit noise , set `` Low '' noise performance still good , improved detail.However , retain detail , precise control noise , process raw files better results.Dynamic range reduced shooting `` Low '' ISO speeds ISO64 ISO100 , standard ISO speeds start ISO200 , highest ISO speed available ISO25600.There slight improvement noise performance compared E-M1 II.ISO figure noise starts become visible : ISO6400 ISO figure noise overwhelms image : ISO25600 Interested ?