https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/164598#M2843 I would just like to add that when you increase the ISO that much. You lose tonal quality and dynamic range, aka the colors produced won't be as vibrant and shadow recovery if necessary will be more grainy. Tue, 16 Feb 2016 21:34:33 GMT NicCharlesPhoto 2016-02-16T21:34:33Z https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/162513#M2841 <P>Will flash help to git rid of grain at high iso like 6400 and above?</P> Sat, 23 Jan 2016 16:32:45 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/162513#M2841 Kolourl3lind 2016-01-23T16:32:45Z https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/162529#M2842 <P>If the flash is powerful enough to light your scene and allow a lower ISO then "yes" grain would be reduced.</P> Sat, 23 Jan 2016 20:05:15 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/162529#M2842 jrhoffman75 2016-01-23T20:05:15Z https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/164598#M2843 I would just like to add that when you increase the ISO that much. You lose tonal quality and dynamic range, aka the colors produced won't be as vibrant and shadow recovery if necessary will be more grainy. Tue, 16 Feb 2016 21:34:33 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/Flash-Photography-at-High-Iso/m-p/164598#M2843 NicCharlesPhoto 2016-02-16T21:34:33Z