What is the aperture and where is the aperture?

The aperture is a device used to control the amount of light that passes through the lens and enters the photosensitive surface of the body, which is usually inside the lens. To express the aperture size, we use the f-number.

Aperture f-number = focal length of the lens and diameter of the lens aperture.

The smaller the value after f, the smaller the camera's aperture can be reduced.

The higher the value after f, the larger the camera's aperture can be.

**Compensation is not aperture.

You should refer to the manual for details.

When shooting portraits, if you are looking for a clean picture and the subject (person) is prominent, then shooting with a lens with a large aperture and long focal length will get the ideal effect, as far as the body and lens you have now are concerned, you use the 55mm aperture of the lens to open the best bokeh effect.

Of course, shooting portraits is not only about background blur, in fact, to shoot a good portrait or to capture your feelings, watch more good films made by masters, and then actually shoot more and you will understand how to shoot a good portrait, sometimes you need to blur the background, sometimes you need to be clear before and after, depending on the subject you want to shoot.

The scenery is the same, most of the time you need to be clear before and after, so you need to use the smallest possible aperture, such as the aperture setting, the choice of focal length mainly depends on the scene you shoot, of course, there are also times when you need to shoot some sketches, you need to open the aperture wide to blur the background.

About the aperture and shutter settings, in fact, it is not a sentence or two sentences can be clearly explained, too much, it is a book.

Since you are a novice, you can buy some books on camera basics to read first, understand what is aperture and what is shutter, and then you can know what combination to apply in what occasion, it is recommended that you use the A stop (aperture priority) gear to shoot **, that is, set the aperture manually, and the shutter will let the camera automatically set according to the metering results.

Here's how to adjust the aperture:1. Prepare your camera first.

2. Then adjust to the aperture priority of the talker.

3. The gear of the part that comes out of the first circle can be adjusted by turning it left and right, and the place where the second circle comes out is the value of the aperture, and the maximum or minimum value of the aperture is not necessarily, because the lens is different. I'm the biggest one.

<>4, we can adjust to 5 first, my camera is 5 by default at the beginning, let's take this value first.

5. The effect of this value, you can take a look at it, and the back is more blurry.

6. Adjust to 13 and shoot again.

7. Look at the effect, this is clearer.

8. You can take a look at the comparison chart.

1. Novices always have a doubt when buying lenses, is the aperture as wide as possible? In fact, the larger the lens aperture, the more light enters the lens, the shorter the camera's ** time, and compared with the small aperture, the large aperture has a better background bokeh effect, which can make the subject of the image more prominent and the overall more concise. Moreover, the larger the aperture parameters, the more intuitive the background blur effect and depth of field effect shot by the lens, and compared with similar lenses, the lens with a larger aperture has more light transmission, and it can also shoot wonderful images in bad light.

So, if your budget allows, try to choose a lens with a wider aperture.

2. Generally speaking, the maximum aperture value of this lens is reduced by 1-2 stops, which is the range from f 4 to f 8 of the lens. The optimal aperture of the lens is the best balance between the influence of aberrations and diffraction phenomena in this lens, and taking pictures with the best aperture value can get the best image quality.

3. The depth of field directly reflects the depth of a **, and the most common way to use it is to guess that the code skin is a portrait shooting, and the background is blurred, and the characters are naturally highlighted. In general, we consider controlling the depth of field through the aperture. But there's more to depth of field than aperture.

In addition to the aperture, we also need to choose to control the depth of field with focal length. Spike depth of field is actually related to aperture, focal length, and shooting distance. The larger the aperture value, the greater the depth of field; The longer the focal length, the shallower the depth of field; The smaller the shooting distance, the smaller the depth of field.

4. When using the aperture priority mode, the aperture value of the lens will be determined first, and then other work will be carried out. This mode allows novices to adjust the aperture size independently, and then the camera automatically determines a suitable shutter speed according to the shooting conditions and the set aperture value at the time, so as to achieve more accurate shooting results. When you can't think too much about the impact of the image, you can use the aperture priority mode, so that you only need to determine what the subject is shooting and how much the background is to be blurred, these factors are only related to the size of the camera's aperture without changing the lens).

5. The main function of aperture and shutter is to control the amount of the camera, the difference is that the aperture will also affect the depth of field effect of the camera, and the shutter of the camera will affect the image quality. Among them, the larger the aperture, the shorter the depth of field, and the greater the amount of mold; The smaller the aperture, the longer the depth of field**The smaller the amount. And the slower the shutter speed of the camera, the greater the ** amount; The faster the speed, the smaller the ** amount, which means that the faster the shutter speed of the camera, the sharper the object can be captured.

When shooting in practice, you need to rely on the coordination of the aperture and shutter to achieve the best results.

The aperture is a device used to control the amount of light that passes through the lens and enters the photosensitive surface of the body, which is usually inside the lens.

For the already manufactured lens, we can't change the diameter of the lens at will, but we can control the amount of light transmitted through the lens by adding a polygonal or circular aperture diaphragm with a variable area inside the lens, which is called the aperture.

To express the size of the aperture, we use the number f, which is denoted as f. The aperture is not the same as the number of f, on the contrary, the size of the aperture is inversely proportional to the size of the number of f, and the number of fs is also called the number of apertures. For example, a lens with a large aperture has a small f-number and a small aperture; Lenses with small apertures and large f-numbers.

The role of the aperture is to determine the amount of light entering the lens.

With the shutter unchanged:

The smaller the value behind f, the larger the aperture, the more light intake, the brighter the picture, the narrower the focal plane, and the greater the bokeh of the subject.

The larger the value behind f, the smaller the aperture, the less light intake, the darker the picture, the wider the focal plane, and the clearer the front and back of the subject.

Aperture is a photographic term.

Aperture is a camera lens made up of several extremely thin pieces of metal that pass light through the middle. The amount of light entering the lens is controlled by varying the size of the hole. The wider the aperture opens, the more light enters through the lens.

The value of the aperture is usually expressed as the impact of f 1 and f 2. The higher the number, the smaller the aperture, and vice versa. When the shutter speed is constant, the right aperture size will bring normal**.

If the aperture is too large, it will cause excessive, and if it is too small, it will lead to insufficient. In addition to adjusting the amount, the most important thing is to control the depth of field. The relationship between depth of field and aperture is that the larger the aperture, the shallower the depth of field, and the smaller the aperture, the deeper the depth of field.

The smaller the aperture, the greater the corresponding value of f. For example, the aperture of f 22 is smaller than the aperture of f 16.

The role of aperture

Generally speaking, the camera's ** at the same sensitivity is determined by the aperture size (f-number) and shutter speed. In the previous article, we know that the aperture f-number = the focal length of the lens and the diameter of the lens aperture, that is, the smaller the aperture f-number, the larger the aperture and the greater the amount of light entering. The reason is that we can increase the shutter speed by increasing the aperture or decreasing the shutter speed by closing the aperture.

Large-aperture lenses usually perform well in low-light environments, and a series of lenses known as "night mirrors" in the DSLR field, such as Nikon's NOCT 58mm and Leica's Noctilux-M 50mm ASPH night lenses, have extra-large apertures. In addition to changing the shutter speed, the aperture also has the function of changing the depth of field.

The function of the aperture is as follows:

1. Control the depth of field.

Controlling the depth of field of the picture is the first thing many people know about the aperture, so here is the matter of aperture control depth of field first. Regarding aperture control, the depth of field is just one sentence: the larger the aperture, the shallower the depth of field (background blur) of the picture; The smaller the aperture, the deeper the depth of field (sharp background) of the picture.

2. Aperture affects the amount of light.

The aperture affects the amount of light entering the lens, when the shutter speed and sensitivity remain the same: the larger the aperture, the more light the lens enters, and the brighter the picture; The smaller the aperture, the less light the lens will enter, and the darker the picture.

This principle is very simple, a large aperture means a large aperture, so the amount of light passing through the unit time is naturally more, and the picture is bright; A large aperture means that the aperture is small, so the amount of light passing through the unit time will naturally be small, and the picture will be dark.

3. The aperture can blur the foreground.

In addition to blurring the background, the aperture can also blur the foreground, so let's give you an example of this. For example, when I photographed lotus flowers two days ago, I not only had to blur the background to show a hazy background, but I also needed to blur the foreground to create a hazy foreground, so I could get a very hazy foreground by turning the aperture up a little bit.

If you shoot a scene with barbed wire, railings and other occlusions, you can use a slightly larger aperture to blur the foreground, which can reduce the interference of these occlusions.

4. The small aperture shoots the starlight effect.

When you shoot a picture with a light source, you can use a slightly smaller aperture to shoot, so that you can shoot a very beautiful starline. Generally speaking, stopping down the aperture to f/11 or smaller will give you a good starlight effect, but this also depends on the light source and the lens, and some lenses can shoot good starlight effects even with a larger aperture.

5. Shoot dream spots with a large aperture.

You can shoot with a wide aperture when shooting night scenes, and if you have a lot of light sources in the background, then you will shoot a very fantastic flare effect. Because you shoot with a wide aperture, the wider the aperture, the shallower the depth of field of the picture, then the background of the picture will become very blurry, and the light source in the background will become very scattered, resulting in a dreamy flare effect.

6. The small aperture can check the cleanliness of the lens.

If you want to know if your lens is dirty, you can use a small aperture to shoot. You can adjust the aperture down, and then take a picture of the white paper or wall**, if there are dirty spots in the picture, it means that it is dirty or dusty.

The small aperture can make the dirt on or inside the lens more obvious, if it is not serious, it is acceptable, then there is no problem, if it is really serious, take it to clean, but don't think that the small aperture is not used much, it will be too late.