ISO

What is ISO?

• How sensitive the camera is to available light
• Measured in ISO's
• Controls how much grain is in the picture

How ISO works technically (in camera) & visually (in photo)

• Technically: ISO is how sensitive the camera is to light 
• Visually: The lower the ISO is, the less grain there is in the picture. the higher the ISO, the more grain there is in the picture
• With a low ISO, your picture will be better quality and less light sensitive
• With a high ISO, your picture will be lower quality and more light sensitive
• The smaller the number, the less grain
• The larger the number, the more grain

What happens to the exposure triangle when you change your ISO?

• When changing the ISO, the aperture stayed the same and the shutter speed changed
• With a lower ISO, the quality of the picture is better and less grain is apparent
• With a higher ISO,the quality of the picture is worse and more grain is apparent