ISO..

ISO Flash

ISO 5000

ISO 800

ISO 400

ISO 50

ISO is the film speed it depend on the how the camera reacts to light. It depends on how sensitive the camera is to light. The iso 50 as you can see make the picture dark and it look blurry. For the iso 400 you can see her but the picture is blurry. And iso 800 to me it work in different because if your in the light more of the light would hsow but if you in the dark only a little would show.