With both analog and digital cameras, ISO refers to the same thing: the light sensitivity of either the film or imaging sensor. When you change the ISO on a digital camera, you're rendering the sensor more or less sensitive to light. The ISO setting you use depends on the amount of light in the scene you are photographing. The more light you have to work with the lower you can set your ISO.
Below is a slideshow that shows pictures from the same place on different ISO settings:
My Worst ISO Picture:
This is the worst picture to show a good ISO I have taken as I changed the ISO setting so it was too high, and made the picture too bright, making it hard to see. The setting was on 1600. I should have changed it to 400.
This is the worst picture to show a good ISO I have taken as I changed the ISO setting so it was too high, and made the picture too bright, making it hard to see. The setting was on 1600. I should have changed it to 400.
My Best ISO Picture:
This is my best picture to display good use of the ISO setting. The environment was really bright, so I had to change my ISO setting to 400, so my picture is crisp, clear and not too bright. It is also a good picture as the subject of the photo (LEGO figure) is bright and stands out against the plain grey background and surroundings.
This is my best picture to display good use of the ISO setting. The environment was really bright, so I had to change my ISO setting to 400, so my picture is crisp, clear and not too bright. It is also a good picture as the subject of the photo (LEGO figure) is bright and stands out against the plain grey background and surroundings.