Is SLR a file or S file for daily photography?

The so-called aperture priority, that is, a file, as the name implies, is to take the aperture as a fixed value and let the camera automatically select other exposure parameters.

In the film age, because the sensitivity is fixed, the camera chooses the shutter on the premise of using the first gear. When it comes to digital technology,

Generation, even sensitivity can be selected by the camera system.

Aperture priority mode requires you to manually select and adjust the aperture value to achieve the desired effect.

In "The Basics of Photography You Must Know", I said that the aperture controls the amount of light entering and the depth of field. The larger the aperture, the more light enters.

The more, the shallower the same depth of field will be, so when we want to take a shallow depth of field, we can adjust it to a large aperture.

In the following cases, we can choose aperture priority mode:

1, portrait photography

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For most people like photography, we need to create a shallow depth of field to blur the background, so as to achieve the purpose of highlighting the subject, because

This manual selection of large aperture has become inevitable.

2. Landscape photography

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Corresponding to portrait photography, we need a wider depth of field when shooting landscapes, so that the foreground and background are in the depth of field at the same time.

Therefore, when shooting scenery, we need to manually select a small aperture to obtain a wider depth of field, so that the camera system can complete it automatically.

Select shutter speed and ISO.

3. Low light photography

Because the aperture controls the amount of light entering, we can get more by opening the aperture on the premise that the illumination is not so ideal.

More light, at the same time can make the shutter speed faster, so as to shoot better, otherwise the camera automatic system is likely to choose one.

Moderate aperture and slow shutter will also cause inevitable jitter and blurred picture.

4. When the outdoor afternoon sunshine is strong,

Similarly, this corresponds to the last one. Outside, because the aperture is strong enough, we can turn it down, otherwise it will be easy to have problems.

Now it's exposed.

Compared with aperture priority, shutter priority means that we can choose the shutter speed manually and let the camera's automatic system help us.

Choose aperture value and sensitivity, and combine a suitable exposure value to shoot the current picture.

Similarly, in "You must know the basics of photography", I said that the shutter controls the exposure time, and the exposure time is straight.

And then affect the trajectory of the object.

So, under what circumstances should the shutter be used first?

1. Freeze the moved entity.

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When we shoot moving objects, such as animal photography, children photography, pet photography and sports photography.

Shadows, even when shooting speeding cars, etc. Because the subject is in constant motion, we need a fast shutter.

Freeze their actions. At this time, you need to choose a very fast shutter speed, and you need to use shutter optimization at this time.

First of all, otherwise the automatic mode doesn't understand your purpose, and the shutter you choose is not so fast, so you can only shoot the motion track.

Step 2 shoot the motion track

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If you want to shoot the trajectory in a short time, or if the object is in a constant motion for a long time, such as the orbit of a star, this time is needed.

For long exposure, accordingly, you can use the shutter to fix a shutter speed first and let the camera system help you choose.

Choose other appropriate aperture and sensitivity. But even so, I think it's good to shoot people's trajectory with the shutter first. The orbit is like this.

Leave the long exposure to the manual gear, because shooting this kind of subject matter must be purposeful and planned, and there will be more.

Set the time for adjusting parameters.

3. Weak light environment or light environment.

Just like aperture, exposure time controlled by shutter also affects exposure. In low light, we can set it so that we can hold it.

The slowest shutter allows the camera to choose other parameters independently, and we can also set one in an outdoor environment with sufficient light.

High-speed shutter or more stable image.

Compared with automatic mode, whether aperture priority or shutter priority can help us shoot the desired effect, it will also let me

Scientists know more about the principle of exposure and let us know more about the three elements of exposure. If conditions permit, semi-automatic molds should be used as much as possible.

Type, in this way, it will not affect the efficiency of taking pictures, and the effect you want will be better.