Understanding ISO

Largest ISO

Smallest ISO

The ISO is how the camera captures the light to make the photo grainy or smooth. The ISO in the camera smooths out the picture as the ISO goes down. The ISO in the photo show that smoothness or graininess. The exposure to light in the the smallest ISO picture shows a dim light. The exposure to light in the largest ISO shows a bight light, but in the largest ISO picture you can see more glare in the background.