Answer:
Aperture refers to the size of the aperture that the diaphragm makes available for light to enter your camera. The aperture size of the diaphragm can be adjustable and is measured by the size of the f-stops "f /?". F-stop (f /?) Is the aperture numbering range between the minimum and maximum, and varies by lens. The photo below shows what a lens diaphragm aperture looks like.
When you change the aperture, "f-stop", you change the size of the lens aperture. Now comes a strange thing that confuses people a lot: the higher the f-stop, the smaller the opening. See the figure below for the difference between f-stops. On the left you can see the f / 32 aperture results in a small aperture. Choosing the f / 1.4 aperture will result in a large aperture of the diaphragm.
How does the aperture of your chosen diaphragm affect your photography?
The most visible effect in choosing your aperture is undoubtedly the depth of field. What does this mean exactly? In simple terms, "depth of field" is how sharp or sharp your image is. But in practice what does this mean?
If you use a large f / 1.4 aperture, the depth of field will be short. That is, only part of your object will be in focus and the rest will be out of focus.
When you use a closer aperture, the depth of field is long. When the depth of field is long, the whole picture will be clear both in front of it and behind.
