Techniques of portrait photography with shallow depth of field?

Everyone has heard that it is good to have a large aperture, but it is too thick to blend into a shallow depth of field. Often cal

Techniques of portrait photography with shallow depth of field?

Everyone has heard that it is good to have a large aperture, but it is too thick to blend into a shallow depth of field. Often called rookie tea, I don't think about food, I just want to really have a large aperture lens. But when you really have it, do you know how to take a portrait with a shallow depth of field? How to use aperture and background? The following are some I have compiled for your reference.

1, the collocation of scattered scenery and scenery

When using a large aperture lens, players must be familiar with the meaning of the scattered scenes in the picture, rather than simply opening the aperture. Why do you say that? Because the depth of field represents not only the requirements for scattered scenery, but also an expression of emotional evolution. Generally speaking, when shooting, we don't recommend players to open the aperture to the maximum. In addition to the illusion of the depth of the scene, it will also make the image fall into a state of no emotion, just like a seemingly beautiful painting, but it does not need attachment and can be replaced at any time.

Therefore, at the moment of shooting, we should first observe the elements that can be used in the scene, and simulate the depth of field in our minds to preview the results of image shooting. Take the following legend as an example. From the scene environment, we can see that all the trees are arranged in an orderly way on the roadside. At this time, if the aperture is fully opened, the depth of field of the image will become layers of color blocks, and the layers that should be there cannot be expressed. On the contrary, the image will lose its meaning and become an ordinary image. Therefore, how to control the depth of field and the collocation of the scene is a part that players need to pay special attention to before operating the large aperture lens.

2. The relationship between depth of field and focal length

In addition to large aperture, the formation of depth of field is also related to focal length. We all know that the depth of field of macro lens is quite shallow, because the focal length is very close, and the greater the ratio of solid size to photosensitive element, the more blurred the farther away from the focal point. When we use it in portrait photography, when we use telephoto lens, we can not only enlarge the aperture to blur the background, but also get closer to the model within an acceptable composition range. It can be seen that after only two steps, the proportion of models in the picture is slightly larger, and the effect of shallow depth of field in the background will be more dreamy.

Another interesting problem of focusing distance and depth of field involves the angle change of real three-dimensional space. When we determine the focal length, the photos should be clear and focused within the same depth of field of the camera. We can simulate it by shooting food. When we put the camera on the desktop and shoot food from a horizontal perspective, you will find that only the plane in focus is clear and the background is fuzzy. At this time, if we pick up the camera and shoot at a 45-degree angle, almost a whole plate of food will be in a clear state. The reason is that the range of depth of field in the picture can be changed because of different shooting angles.

3. Focusing technology in low light environment

Many good low-light portraits, their sharp and deep eyes, or the dreamy and scattered scenes revealed by artificial light, are believed to be wonderful works that players are attracted to after seeing, and people can't help but want to shoot similar pictures. But often after the actual shooting, I often feel a little confused, or I don't focus on the position I want accurately.

The main reason may be that the focusing system of middle and low-order models can not effectively distinguish the hierarchical distribution of images in low-light environment, and thus can not focus accurately. Another point is that because the depth of field of the large aperture is extremely shallow, phase shift focusing occurs during the secondary composition movement after focusing. So, in the face of such a problem, how can we improve the focusing accuracy? Will you spend a lot of money on top-notch equipment? Or take more photos and gamble? Of course, these are all options that can be considered, but in fact you have a better choice.

4. A new world of high-sensitivity applications

For many players who use a large aperture to shoot portraits, shooting at night is the best time to use a large aperture lens, which can not only improve the shutter speed by taking advantage of the characteristics that a large amount of light enters the large aperture in time, but also help stabilize the image and show the charming scene of thousands of lights in the city. I remember the contents in magazines a few years ago. We often advocate players to reduce the use of high sensitivity as much as possible to reduce the impact of noise on the picture, and even hope that players can use flash to fill the light, so that the image effect is stronger in the night style.

However, with the improvement of photosensitive element technology and processor performance, ISO has already surpassed the past and reached a higher level. So it is no wonder that in the past year, players' ideas about portrait night shooting have been constantly changing, not only gradually reducing the use of flash, but also focusing on the unique atmosphere brought by weak light, and trying to use the emotions generated by light and atmosphere.

Players who want to try this kind of theme are advised to prepare at least one lens with a large aperture of F 1.8 * *, and use f1.4 * * *, whether it is 24mm, 35mm or even the most basic 50mm F 1.8, and use 1600 or above. When shooting, players can look around the artificial light sources to find the ideal light direction, and capture the light first by using the methods of front light, back light and side light. When the environment is familiar, they can freely use the existing light direction to change it, such as using super-bright street lamps to make their hair shine, which is also a good expression.