What is the function of aperture?

Before we talk about aperture, we must first know what aperture looks like. Take a lens as an example to show you the true face of the aperture, as shown in figure 1.

Knowing the appearance of the aperture, the following honey tea will give you a detailed introduction from five aspects:

First, how the aperture works;

Second, how to express the aperture in the camera;

3. What effect does aperture have on taking pictures?

Fourth, how to choose the appropriate aperture;

5. How to set the aperture of the camera?

If you know these five aspects of knowledge, I believe you will be able to skillfully use the aperture.

First, how does the aperture work?

Aperture is a device used to control the amount of light entering the camera. When we take pictures, the first threshold for light to enter the camera is the aperture.

In order to help you better understand how the aperture controls the amount of light, the following honey tea is shown to you, as shown in Figure 2.

It can be seen that the larger the aperture, the more light enters the camera; On the contrary, the less.

This is how the aperture controls the amount of light entering the camera. For example, the hole is like the valve of a faucet. The bigger the valve is opened, the more water will flow out at the same time; On the contrary, the less.

Second, how is the aperture represented in the camera?

In the camera, the aperture is expressed in the form of "F+ number", as shown in the box in Figure 3, and F3.5 is the aperture. The larger the number after f, the smaller the aperture; The smaller the number after f, the larger the aperture.

Let's continue to look at Figure 4:

From this picture, it is obvious that:

The larger the number after f, the smaller the aperture, the smaller the aperture and the less the amount of light entering;

The smaller the number after f, the larger the aperture, the larger the aperture, and the more light enters.

So the aperture of F 1.8 is larger than that of F22.

When it comes to honey tea, the form of "F+ number" is often mentioned to indicate the aperture, so be sure to remember it.

3. What effect does aperture have on taking pictures?

The size of the camera aperture controls the amount of light entering and directly affects the brightness of the photo.

At the same time, with the same sensitivity,

The larger the aperture, the brighter the photo; The smaller the aperture, the darker the photo, as shown in Figure 5- Figure 7.

Secondly, from the point of view of photography, the aperture has another function, which is to control the depth of field of the photo.

What is the depth of field?

Depth of field can be simply understood as a clear part of a photo. The clearer the part of the photo, the deeper the depth of field.

The less clear parts, the shallower the depth of field. The following honey tea shows you the depth of field through Figure 8.

The clear part is the depth of field of the camera. It's as simple as that. Just remember.

Back to the topic: What is the relationship between aperture and depth of field? Honey Tea took three photos for you to explain in detail, as shown in Figure 9- Figure 1 1.

Through the comparison of the above figure, we can see that as the aperture gradually becomes smaller, the background of the photo becomes clearer and clearer, that is to say, the depth of field becomes deeper and deeper, and the blur is not obvious, so the relationship between aperture and depth of field is as follows:

The larger the aperture, the more serious the blur and the shallower the depth of field;

The smaller the aperture, the lighter the blur and the deeper the depth of field.

Fourth, how to choose the right aperture

1. If you want to take a beautiful photo of the flower sea, try to take a clear photo of the whole flower sea with a small aperture, as shown in figure12; If you want to highlight a single flower, you should blur the background with a large aperture, as shown in figure 13.

2. For example, if you want to take a group photo when you see beautiful scenery, you can take a clear picture of people and scenery with a small aperture, as shown in figure14; If you want to highlight people alone, blur the background with a large aperture, as shown in figure 15.

3. If you want to shoot the starlight effect of street lamps at night, you can use a small aperture, and the contrast effect is shown in figure 16- figure 17.

Verb (abbreviation of verb) How to set the aperture in the camera?

Honey tea takes Canon 800D as an example to teach you how to set the aperture:

1. Go to the AV file (aperture first), as shown in figure 18. Turn the main dial at the top of the fuselage directly, as shown in figure 19, and it can be adjusted.

2. Shift to M gear (full manual mode), as shown in Figure 20. Press the exposure compensation key, as shown in Figure 2 1, and rotate the main dial for adjustment.

At this point, this tutorial is over. Honey Tea will give you a summary:

How does the aperture work?

By controlling the contraction of the diaphragm blades, the amount of light entering can be controlled. The larger the aperture, the more light enters. On the contrary, the less!

▍: How does the aperture of the camera behave?

The aperture is represented by "F+ number", and the larger the value after f, the smaller the aperture; On the contrary, the bigger!

▍ What effect does aperture have on taking pictures?

① The bigger the aperture, the brighter the photo; The smaller the aperture, the darker the photo;

② The larger the aperture, the better the background blur; The smaller the aperture, the less blurred the background.

▍ How to choose the right aperture

① The large aperture is easy to highlight the main body, which is suitable for taking flowers and close-ups of people.

② Small aperture is suitable for shooting landscape subjects.

▍ How to set the aperture

① When in AV gear (aperture priority mode), it can be adjusted by directly turning the main dial at the top of the fuselage;

② In the range of m (full manual mode), you need to press the exposure compensation key and rotate the main dial for adjustment. ?

If you want to see more tutorials, you can pay attention to the following account: update the featured tutorials every day.