ISO Sensitivity
As photography means painting with the light, any photographer is in control of its composition (elements arrangement in the frame and even adding photo effects later or cropping it for a better result, for example) and exposure – when you press the shutter release you are just telling the camera to stay open for a certain amount of time and let a determined quantity of light in, reaching the camera sensor (digital) or film.
The exposure is controlled by 3 (three) adjustments we make in the camera: shutter speed, aperture and sensitivity. Shutter speed and aperture ultimately control how much light comes into the camera (we can compare this to a water tap – how much you open the valve and for how long will dictate the amount of water that will flow)… and how much light is needed … Read the rest