READ: ISO

Summing it up

So there you have it. A few examples of how ISO affects images and how it can help you or hinder you in different circumstances. Remember, there are lots of different ISO settings (100, 200, 400, 800, 1600, 3200, etc etc) and I just showed you the 2 extremes - really low ISO and really high ISO. Your ISO sensor is also better depending on you camera type, so a higher ISO might not be as grainy on a more expensive camera.

Moral of the story:

ISO 100 = very clear but very dark images. Must use this when you have tons of light coming into your camera.

ISO everything else = for all situations in between!

ISO 1600 = very grainy but can bring lots of light to the scene. Must use this when you have no light and you have to sacrifice film quality.