The Exposure Triangle

• The exposure triangle is a common way of linking th
• e three variables that determine the exposure of a photograph.
  • The three variables are aperture, shutter speed and 
    ISO.
  • Aperture is a measure of how open or closed the lens’ iris is.
  • Shutter speed is how long the shutter remains open and so how long the lens is exposed to light for.
• The three variables in the triangle work together to give you the photograph that you want.