ISO

ISO is the level of sensitivity of your camera to available light. The lower the ISO number, the less sensitive it is to the light, while a higher ISO number increases the sensitivity of your camera

higher sensitivity comes at an expense – it adds grain or “noise” to the pictures.

ISO Speed Example:

ISO 100 – 1 second

ISO 200 – 1/2 of a second

ISO 400 – 1/4 of a second

ISO 800 – 1/8 of a second

ISO 1600 – 1/16 of a second

ISO 3200 – 1/32 of a second