You may have come across the term aperture in your camera .you may be just going through the numbers at the back of the screen but you do not know what they are and what they do.
Well, here it is…
What is an aperture in Photography?
Aperture is nothing but a hole inside the lens through which light passes and hits the camera sensor to create an image.
Aperture is responsible for two things.
1:- Controlling the amount of light entering the camera.
2:- DOF is also known as depth of field
Which I will explain in the further article…
Aperture is denoted by f and its values are known as f stops.There are two types of stops.
Full Stops and Mid Stops
I am mentioning the numbers below. which are full stops.
Full stops are universal in each and every camera but mid stop may vary as per the brand of the camera. So the numbers which come between your full stops can be considered as mid stops. You can check it by yourself.
f/1, f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22, f/32, f/45, f/64, f/90, f/128
As you can see above the f numbers are increasing and we already know that aperture is just a hole inside the camera lens. So as the number increases the size of that hole decreases. And as the number decreases the size of the hole increases.
Or in simple terms, we can say that
f numbers = 1/Size of the lens opening.
Now it seems logical to you that if we increase the f-number the hole size decreases which results in less light entering the camera and if we decrease f-number the result will be vice versa.
Let us see this as an example.
Let us suppose I am taking my friend’s portrait outside and it’s a bright sunny day.
I click my image at f/2 which is a full stop. My result came out to be very bright now what I have to do to take the perfect exposure. I need to control the light and how can it be done?
Simple by increasing the f-number because we already read above that increasing aperture value may result in lesser light entering the camera.
As I set the value to f/8 the image is exposed properly and all the colors are vibrant.
Now another half of the article that is Depth of Field
What is DOF (Depth of Field)?
A depth of field is the amount of area which is in focus…
Means that in an image there are two areas one is sharp in which your subject is placed and other is blurred so the sharp area is known as depth of field.
How is DOF related to aperture?
Aperture is directly proportional to DOF if we increase the f-number then DOF will also increase means we will get more of the area in focus and sharp.
If you want the background to be blurred then your f-number must be minimum of what your lens provide which gives you a shallow DOF.
Example of lower f-Number (Shallow DOF) Example of higher f-Number.
So this was all about aperture and its uses hope you understood everything if I missed something then please feel free to write below in the comment section.