Samsung NX1000 User Manual - Page 19

Concepts in Photography How the aperture setting, shutter speed, and ISO sensitivity control exposure The aperture setting, shutter speed, and ISO sensitivity are closely interconnected in photography. The aperture setting controls the opening that regulates the light that enters the camera, while the shutter speed determines the length of time that light is allowed to enter. ISO sensitivity determines the speed at which the film reacts to light. Together, these three aspects are described as the triangle of exposure. A change in shutter speed, aperture value, or ISO sensitivity can be offset by adjustments to the others to maintain the amount of light. The results, however, change according to the settings. For example, shutter speed is useful in expressing movement, aperture can control the depth of field, and ISO sensitivity can control the graininess of a photo. Settings Results Settings Shutter speed Fast speed = less light Slow speed = more light Results Fast = still Slow = blurry ISO sensitivity High sensitivity = more sensitive to light Low sensitivity = less sensitive to light Aperture Wide aperture = more light Narrow aperture = less light High = more grainy Low = less grainy Wide = small depth of field Narrow = large depth of field 18