EXPOSURE TRIANGLE

The exposure triangle consists of three variables that adjust how a camera captures light: aperture, shutter speed, and ISO. Together, these three elements properly expose an image. The three variables of the exposure triangle are all dependent on each other. For example, adjusting one of the three variables will entail an adjustment of another to maintain proper exposure. The exposure triangle is also referred to as the photography triangle and camera triangle.

Aperture, shutter speed, and ISO are the primary variables of the camera triangle that control exposure. However, each variable also affects other qualities of an image. Depth of field, motion blur, and noise are all determined by elements of exposure triangle photography.