Why aperture affects the Depth of Field?

Aperture is like the size of a door, bigger doors let more light in and change how much of your room stays clear from front to back.

Imagine you're taking a picture with a camera, which works kind of like a box that lets light in through a hole (the aperture). If you make that hole bigger, it’s like opening the door wide, more light comes in, and things that are not right in front of you start to look blurry. That's what happens when you use a wide aperture, like f/1.8.

But if you make the hole smaller, it's like closing the door almost all the way, less light comes in, but everything from near to far looks sharp. That’s how a narrow aperture, like f/16, works.

So, the bigger the aperture (the hole), the shallower the depth of field, meaning only part of your picture is in focus. The smaller the aperture, the deeper the depth of field, more of your picture stays sharp from front to back.

It’s like when you're looking through a keyhole vs. looking through a big window, one shows just a little bit clearly, and the other shows a whole room. Aperture is like the size of a door, bigger doors let more light in and change how much of your room stays clear from front to back.

Imagine you're taking a picture with a camera, which works kind of like a box that lets light in through a hole (the aperture). If you make that hole bigger, it’s like opening the door wide, more light comes in, and things that are not right in front of you start to look blurry. That's what happens when you use a wide aperture, like f/1.8.

But if you make the hole smaller, it's like closing the door almost all the way, less light comes in, but everything from near to far looks sharp. That’s how a narrow aperture, like f/16, works.

So, the bigger the aperture (the hole), the shallower the depth of field, meaning only part of your picture is in focus. The smaller the aperture, the deeper the depth of field, more of your picture stays sharp from front to back.

It’s like when you're looking through a keyhole vs. looking through a big window, one shows just a little bit clearly, and the other shows a whole room.