1) What is Aperture?
Aperture is hole in camera lens which allows the light to pass to camera body . camera now a days are just like human eye . Front element of camera acts like cornea which gathers all external light . Iris control the size of pupil by shrinking or expanding and hole that lets the light pass further into eye . Larger the size more light will enter or vice-versa .
2) Size of Aperture – Large vs Small Aperture
Aperture is called " diaphragm " in optics . Aperture is expressed in F-numbers( for e.g f/1.9 ). F-numbers that are known as F-stops which determine the size of aperture . Smaller the F-stop larger the aperture or larger the F-stop smaller aperture for e.g f/1.8 is larger than f/2.0 and way larger tham f/7.0 .
3) What is Depth of Field?
The size of aperture has direct impact on Depth of Field . Larger F-number will bring the foreground anfd background in focus where smaller F-number will isolate foreground by background by blurring background .
4) Aperture To Be Consider ?
Every lens has limit how large or how small aperture can get . The maximum aperture of lens is more important then minimum . A lens that has an aperture of f/1.2 or f/1.4 as the maximum aperture is considered to be a fast lens, because it can pass through more light than, for example, a lens with a maximum aperture of f/4.0. That’s why lenses with large apertures are better suited for low light photography. Maximum aperture means that the lens can pass through more light, and hence, your camera can capture images faster in low-light situations. Having a larger maximum aperture also means better ability to isolate subjects from the background.
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