Aperture-It is the fixed or resizable opening or pathole of a camera where it enables and controls inflow of  light into the camera from a source in required amount. Quality of an image depends on it’s  aperture size.

  The aperture is generally expressed as an f- number or f- stop, similar as f/1.4, f/2.8, f/ 16 etc. A lower f- number corresponds to a larger aperture opening, allowing higher amount of light to enter the camera. This results in a shallower depth of field, where the subject is in focus while the background appears vague. An increased f-number, on the other hand, indicates a lower aperture opening, allowing lower light to pass through. This leads to a lesser depth of field, where both the subject and the background are in focus. 

      Aperture also plays a pivotal role in the exposure of an image. When the aperture is wide open, further light is captured by the camera detector, performing in a brighter image. Again, a lower aperture lets in lower light, performing in a darker image. The choice of the aperture depends on colorful factors, including the asked depth of field, available light, and the shooter’s creative intent.

  Most camera uses an adjustable Aperture and it can adjust their size to inflow the required amount of light, but till now smartphones uses fixed Aperture that can pass only a fixed amount of light into the camera.