Some photos have very clear backgrounds, while others are completely blurred. In order to express different artistic conception, we will choose different depth of field. How to effectively control the depth of field of the picture? Please see below: What is the depth of field? Simply put, the depth of field is the clear range in the photo. The lens can only guarantee the absolute focus of a plane when imaging, but there will be a clear range before and after this plane, which is called "depth of field". And the area outside this range will become blurred, called "Jiao Wai". By controlling the depth of field, we can control the clear and blurred areas in the photo. Can learning depth of field improve my photography? Depth of field is very important in photography. Learning how to control the depth of field can greatly improve your photography. To shoot a scene, we need to judge the clear range in the photo, and then use reasonable methods to achieve it. From a simple idea to the expression of photographic language, it is very important to master the method of controlling depth of field skillfully. What factors limit the depth of field? The depth of field is not limited by a single factor, mainly including aperture, focal length and focusing distance. So don't blindly use a large aperture, and choose the appropriate method according to different subjects. Professional photographers will adjust different settings to control the depth of field. What is the easiest way to control the depth of field? Although the depth of field is related to many factors, the most obvious effect is to adjust the aperture. The smaller the aperture, the greater the depth of field. Therefore, when shooting landscapes with large depth of field, you can lower the aperture, such as f/22, and when shooting portraits and close-ups with blurred backgrounds, you need to adjust the aperture to f/5.6 or even larger. The aperture can be controlled by semi-automatic exposure mode of the camera, including aperture priority mode and shutter priority mode. Can you control the depth of field by mastering the laws of aperture and depth of field? Not quite right. Because the light of the shooting scene will limit the range of your aperture. When the scene is dark, the camera will blur the picture, so we must first ensure the shutter speed and then ensure sufficient depth of field. On the other hand, the aperture of the lens is limited, and the maximum aperture of many lenses can't meet your requirements. These limitations prevent you from freely adjusting the depth of field of the aperture. At this time, you can try to change other factors to adjust the depth of field. Besides aperture, how to use other factors to adjust the depth of field? In addition to the aperture, there are two factors that can control the depth of field-the focal length of the lens and the focusing distance. The shorter the focal length of the lens, the farther the focusing distance and the greater the depth of field. Therefore, under the same aperture, shooting with a wide-angle lens will get a greater depth of field than shooting with a telephoto lens. The shorter the distance you shoot, the closer you are to the subject, and the smaller the depth of field will be. So when the aperture can't meet your requirements, try to adjust the focal length of the lens and the distance from the subject, which can also change the depth of field. Is the foreground depth of field as big as the back depth of field? The size is different. When the camera focuses, the front of the focused plane is called foreground depth and the back is called depth of field. Generally speaking, the depth of field in the back will be higher than that in the front. This difference is hard to detect with the naked eye, but it cannot be ignored. When taking photos with small depth of field, focus as accurately as possible. Although the objects in the depth of field are very clear, it is safest to put the key parts on the focus plane. When taking photos with large depth of field, a wide-angle lens can give you a large depth of field. You can narrow the aperture and set the focal length at the hyperfocal distance position, so that most of the pictures are clear. What is the depth of field when shooting macro? Macro photography has a small depth of field because the lens is close to the object, and only a small range before and after the focal plane is clear. Even if the aperture is very small, the depth of field is usually only one or two millimeters. How can I get the maximum depth of field? First, use a small aperture, such as f/22. When the shutter speed may be slow, you may need a tripod to stabilize the camera, or increase the ISO sensitivity to increase the shutter speed. Second, use a wide-angle lens to shoot, use a short focal length, and arrange the subject in a far position. Finally, setting the focal length at the hyperfocal distance position can ensure the maximum clarity of the picture. How can I make the depth of field smaller? To get a small depth of field, you should use a long focal length lens and get as close as possible to the object you want to shoot. Then enlarge the aperture. Many "high-speed lenses" have apertures above f/2.8, which can create soft Jiao Wai blur. The depth of field is also related to the size of the photosensitive element. The larger the photosensitive element, the smaller the depth of field. Therefore, under the same settings, the depth of field of Quan Huafu digital photos is smaller than that of non-full-frame digital SLR cameras, while the depth of field of consumer digital cameras is very large. How to control the depth of field? First, shoot with low sensitivity.
In digital SLR cameras, in order to make the viewfinder bright, the aperture is always fully open when taking a view, and it will be reduced when pressing the shutter. So what you see is always the depth of field at the maximum aperture. Second, use the preview function of depth of field. Most digital cameras have depth of field preview buttons on their bodies. Press this button, the aperture will be reduced to the set actual aperture value, so as to observe the depth of field. Third, the viewfinder darkens. When using the depth of field, the aperture will be narrowed, the light in the lens will be reduced, and the viewfinder will be darkened, making it difficult to distinguish the focus. It is best to use this function after focusing. Fourth, the more intuitive way to enlarge the picture to check the depth of field is to check the picture after shooting, especially when shooting a still life with a tripod, you can try different apertures repeatedly and check the change of depth of field by enlarging the picture. 5. Pay attention to details. After the shooting is completed, it is best to enlarge your photos ten times to observe the smallest details, so as to ensure that the objects you want to present are clear. Especially when using a macro lens, you may only have a depth of field of one millimeter, so make full use of it. Six, after a comprehensive inspection of the enlarged photo, use the direction keys to move the angle of view and check every detail of the photo at the critical depth of field. First, check the photos in time after shooting, adjust the aperture setting, and strive for perfection. Seven. Explanation of terms 1. Depth of field: the clear range of imaging before and after the focal plane in a photo. Within the depth of field, the edge of the object is clear and sharp, while outside this range, the object will become blurred. It is a very wise shooting technique to create by comparing the depth of field between virtual and real. 2. Preview of depth of field: Preview of depth of field is a function of the camera. When we look at the composition and focus through the viewfinder, the camera will fully open the aperture to ensure that the viewfinder has enough light, and then shrink to the position set when you take pictures. This means that when shooting, we see the depth of field effect at the maximum aperture. After opening an account, the aperture will shrink to the size you set inside and outside, and observe the actual depth of field. Of course, at this time, the viewfinder will darken because of the reduction of light. 3. quality circle: the depth of field is a range. On the focused plane, the picture is absolutely clear. Before and after the focus, the light began to gather and spread, and the image of the point began to blur, forming an enlarged circle. This circle is called the mass circle. 4. Infinite distance: Focus has the nearest distance, but there is no farthest distance. All the shots have infinite scales. When the object distance exceeds a certain range, it can be considered that the object enters the lens in the form of parallel beams from infinity.