It only takes three strokes to take a "star photo"

The photos of the stars are all prominent and the background is blurred, giving people a sense of domineering.

In fact, star photos are scattered photos.

Many people like beautiful shooting scenes, especially for portrait photography or still life photography, and shooting scenes has become the best way to highlight the theme. By blurring the background and foreground, the subject in the focus is separated from the foreground and background, and the audience's attention is more focused on the subject.

How to shoot? Perhaps the aperture is the first thing that many people think of. Yes, to a certain extent, the larger the aperture, the shallower the depth of field. However, the aperture is only one of the factors that control the depth of field. Otherwise, many mobile phone cameras will not have a large aperture of f/ 1.7, but the shot is still nondescript, even worse than the shot of another lens, f/5.6.

The concept of lens photography is very simple, that is, the fuzzy aesthetic feeling produced by the out-of-focus part of the image taken by the lens. The essence of the lens is out of focus, and the part outside the focus becomes the lens. However, there is a difference between "good" and "bad" shots. Different lenses have different shooting styles due to different optical designs, which depends on a series of factors, including the quality of the lens and the number of blades.

In theory, any lens can form a lens, even a small consumer digital camera (such cameras have almost disappeared due to the popularity of mobile phones), or even a mobile phone. As long as you know the elements that make up the lens and use them properly, you can take pictures with blurred background.

1, aperture

The first thing is the aperture. The larger the aperture, the more light enters the lens, which will also cause a relatively shallow depth of field, making many scenes in the picture out of focus and blurred into scattered scenes.

The above photo was taken with a large aperture, and the focal length was controlled in a small range. All the scenery outside the range was out of focus and became a lens. However, when shooting with a super-large aperture, there is often a problem. The subject is out of focus locally, which means that your subject may not be in focus. At this time, either narrow the aperture to let the subject enter the focus range, or ensure that key parts, such as human or animal eyes, are in focus.

However, it needs to be clear that the maximum aperture of the lens usually can't get the best picture quality. There are few and expensive lenses available for full aperture, and most cameras will lose their sharpness when they are fully open, and there will be defects such as purple edges. They should be taken into account when shooting at full aperture.

2. Fax and telegram

Although technically, any lens can be defocused, just as the larger the aperture, the shallower the depth of field and the longer the focal length, the easier it is to get a shallow depth of field, which is why people who take portraits often use medium-long focal length lenses instead of wide-angle lenses. Why do studio photographers like to shoot people with a lens of 70-200mm, because it is easier to shoot out of focus.

We look at many photos of wild animals. They are often a clear theme, but the background is blurred. This is also because field photography needs to be shot with a telephoto lens, which causes the scenery around the subject to be out of focus and become a scattered scene.

The focal length is related to the frame, and the actual focal length of the equivalent focal length is different under different frames. The same 28mm lens has a focal length of 28mm at 135 Quan Huafu, while the actual focal length of the same 28mm lens of mobile phone is only 3.99mm(iPhone 7), which is much smaller than that of Quan Huafu. Therefore, although the mobile phone has a nominal large aperture, it still can't be photographed because the border is too small, so it is practical.

3. Distance

There are two distances here, one is the distance between the camera and the subject, and the other is the distance between the subject and the background.

The closer our camera is to the subject, the shallower the depth of field will be, which can be seen clearly through the depth of field ruler. It is easy to understand that the farther the subject is from the background, the higher the degree of background blur. The farther the subject is from the focus area, the more serious the natural defocus will be. Controlling the relationship among camera, subject and background can help us to take photos with blurred background more easily.

Although we know how to shoot scattered scenes, it is still not enough. We still have to master how to control the scattered scenes and make them work for us, otherwise it is meaningless. In the choice of shooting objects, lighting is a good element, and background lighting can make various light spots appear in the background of the picture and become a bright background. Not only lighting, but also a little light from the gaps in the leaves can help us to take a nice shot if there are big trees in the background.