What is exposure in photography?

Exposure refers to the amount of light which reaches your camera sensor and it also determines how light or dark an image will appear when it has been captured by your camera.

Luminous exposure affected by the three camera settings that are ISO, shutter speed and aperture which result in a photo of the proper brightness. These three settings are called The Exposure Triangle. Each setting controls exposure differently and also understand how they work together to affect your exposure.

Three elements are important for exposure that is noise, motion, and depth of field. Exposure Value (EV) for a given setting represented when these three elements are combined. The image which is well exposed doesn’t contain too much white or black. These three adjustable elements present in camera controls the exposure. Balancing of these three setting responsible for the proper exposure of a photo, so that photo looks good. Haythem Lafhaj is sharing the details below, please have a look.


This setting changes the sensitivity of the sensor present in the camera.  ISO stands for International Standard organization. Its range in value from 25 to 3200. Higher ISO will produce more digital noise and the image sensor is more sensitive. Random color created in an image due to any light signal that does not originate from the subject is known as digital noise. Lower ISO speed is always desirable because the image sensor is less sensitive and therefore the smoother the image. The main stops in ISO scales are 100, 200, 400, 800, 1600, 3200 and 6400 and at higher numbers, your photo will be brighter.

Shutter Speed

It determines when the sensor of the camera will be opened or closed to the incoming light from the camera lens. In other words, it is the amount of time taken by the camera for taking a picture. You can control the shutter speed from seconds to fractions of a second. Shutter speed is inversely proportional to the exposure time that is faster the shutter speed, shorter the exposure time. It is measured in a fraction of a second. Shutter speed is used to control motion. Shutter speed is one of the camera settings which freeze or exaggerate the appearance of motion.


It is the opening in the lens diaphragm or simply a hole within the lens that determines the amount of light passing through the lens. Aperture is written as f/4, f/8, f/16 and so on. If the setting of an aperture to a lower value allows more light in and light restricted if set it to a higher value. Aperture affects the depth of field. Small apertures that are f/11, f/16 gives large depth of field and large apertures that is f/1.4, f/2.8 gives shallow depth of field.