The small aperture of the lens has those advantages of 90

In addition to reducing the shutter speed (some subjects require slow speed for photography), the small aperture can make the image of large scenes more detailed.

And in some scenes, the foreground is very close, which requires a large depth of field, and medium apertures are generally not sufficient, so smaller apertures are required.

In addition to the aperture that affects the depth of field, there are two other factors, the shooting distance, the focal length of the lens, and the position of the foreground.

Small aperture sharp...

F8 is on the line, F8 is the best imaging aperture for general lenses...

The ** time can be extended, the aperture is reduced to a certain extent, and continuing to shrink will reduce the image quality, not the smaller the better.

For example, at night, you can use the aperture of f 22, add a flash, and after flashing at the subject, the subject character walks out of the lens area, and if the time is pulled to 30 seconds, all the people moving in parallel to the negative in the background will not be visible, only the still life and the subject figure. If you use a large aperture, you can't use it for such a long ** time, and if you use a large aperture shutter for a long time + ND lens, the flash effect of the subject will be greatly reduced.

This is just one of the many more that are just one of the applications.

In addition to increasing the depth of field, the small aperture also reduces the shutter speed, when we want to shoot the waterfall into a yarn, in order to reflect the dynamism of the girl holding the umbrella on a rainy day, we have to reduce the shutter speed, then we adjust the ISO to the minimum, if there is no filter, we can only adjust the aperture smaller.

Is it better to have a wider lens aperture? Whether it is the SLR world or the mobile phone world, people are pursuing a large aperture. Let's take a look at whether the lens aperture is as wide as possible.

In fact, for portrait shooting, a simple and effective way to scale the aperture is to widen the aperture, on the one hand, it can highlight the character by blurring the background, and on the other hand, it can also reduce the ** time, so as to prevent shaking.

Portrait mode is designed to automatically open the aperture to the maximum for portrait shooting, so why do we recommend using aperture priority?

The reason is simple: while a wide aperture is good for portrait shooting, a wider aperture is not always better. At the same time, we need to ask you a question, from the parameters of the lens, we can know the maximum aperture value and the optimal aperture value of this lens, but that is the data in the laboratory.

Do you know what the optimal aperture value for this lens is for you?

So, for the aperture of the lens, keep three points in mind:

1. It is incorrect to open the maximum aperture at all times.

2. It is unwise to blindly pursue the theoretical best aperture at all times.

3. Only the point that is closest to the optimal aperture value and can ensure that there is no jitter is your best aperture value. This can only be found if you experience it yourself.

Creating depth of field through the aperture is a common technique in photography, but it is not always possible to have a wider aperture

Aperture is an important measure of lens performance. We tend to use the maximum aperture of a lens to indicate how powerful the lens is, and the higher the maximum aperture value, the stronger the lens. As a result, many friends habitually open the aperture to the maximum when shooting, thinking that this can give full play to the performance of the lens.

This is not the case.

Each lens has an optimal aperture value. Although the optimal aperture value is different for each lens, it is almost certain that the maximum aperture value is not necessarily the best value. It should also be noted here that the best aperture value we often refer to in terms of optical quality alone.

From this point of view, the optimal aperture value in the parameters is the result of the laboratory. The only way for you to know which aperture value is best is to take a few more shots of the same object to find the point that guarantees no jitter and produces the sharpest image quality.

If you find yourself fumbling around, there is an easy way to lower the maximum aperture by two stops, and at this aperture value, you can often get good imaging results.

However, this method is only applicable to some lenses, and it is not universal for all Song Sleepy lenses, such as Canon's 50mm prime head, which has an optimal aperture value of f8, which is a full 5 stops down.

Finally, a small reminder, that is, jitter, if you say that after adjusting to the best aperture value, the shake of your hand will have a greater impact on the picture, then continue to increase the dimming aperture.

<> "Know the Aperture - What Does the Aperture of a Lens Do?"

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 lens that has been manufactured, we can't change the diameter of the lens at will, but we can control the amount of light transmitted by adding polygons or circles to the inside of the lens and a variable aperture diaphragm, which is called the aperture.

2. The aperture controls the amount of light entering the light.

The larger the aperture, the greater the amount of light entering.

We can think of the aperture as the pupil of the cat's eyes, the cat's pupil controls the amount of light entering, the larger the pupil, the more light enters, and the smaller the pupil touches the Zen hole, the less light enters.

When a cat switches between light and dark environments, its pupils will also widen or shrink. The pupil of the camera is the aperture. You can control how much light enters the camera by controlling the size of the aperture.

3. Aperture controls depth of field.

The wider the aperture, the shallower the depth of field.

Another important effect of the aperture is depth of field. Depth of field refers to the clear image presented in the range before and after the focus is completed, and this distance range between the front and back is called depth of field. In other words, it is the range that can be clearly imaged.

4. Aperture value f

Why does the larger the aperture, the smaller the aperture value?

This is because to express the aperture size, we are defined by the f-number, where f = the focal length of the lens and the diameter of the effective aperture of the lens. Aperture f-number = focal length of the lens The diameter of the aperture of the lens.