ISO and Bracketing

Bracketing

This bracketing would mean that the image taken would be lighter.

This bracketing would mean that the image taken would be darker.

This is a neutral bracketing that would mean that the lighting would not be affected.

ISO

100 ISO is used for sunny, bright settings

200 ISO is used for more half cast outdoor settings

400/800 ISO is used for indoors.

1600 is also used for indoor settings.

3200 is used for night situations.

The higher the ISO the grainier the image itself will be, for example 100 will be clear whereas ISOs like 1600 and 3200 will have much more grain on the images taken.