Exposure triangle
The exposure triangle is a fundamental concept in photography that brings together three settings: aperture, shutter speed and ISO sensitivity These three elements interact to control the amount of light reaching the sensor, thus determining the exposure of the image. Mastering these parameters results in a correctly exposed and aesthetically balanced photo.
The three elements of the exposure
triangle
Aperture of the diaphragm (f-stop)
: Controls the amount of light that enters the lens, and impacts depth of field. A large opennng of camera lens (small number, such as f/1.8) lets in more light and creates background blur (bokeh).
while a low opening of camera lens (large number, like f/22,) lets in less light
and makes the image sharper across the entire depth.
Sony ILCE-6700 f/22 1/100 s ISO 800 lens 20mm Shutter speed (exposure time):
Determines how long the camera's sensor is exposed to light. A fast speed
(e.g., 1/1000s,1/640s) freezes motion, letting less light in.
Sony ILCE-7M3 f/3.2 1/640 s ISO 100 lens 42mmA slow speed (e.g., 1/20s) captures more light but may create motion blur if the subject moves.
Sony ILCE-7M3 f/22 1/20 s ISO 100 lens 42mm
