Shooting with a wide aperture is the pursuit of many photography enthusiasts, it can bring a shallow depth of field effect, make the subject stand out, and the background is blurred, creating a beautiful picture. However, there is also a problem with shooting with a wide aperture, and that is the problem of focus. Why does a wide aperture make it difficult to focus?How to solve this problem?In this article, we'll introduce you to some principles and techniques to help you shoot sharp and wide apertures**.
Why does a wide aperture make it difficult to focus?
To answer this question, we first need to understand what depth of field is. Depth of field refers to the range that is clearly displayed in **, and it is determined by the aperture, focal length, and focusing distance of the lens. In general, the larger the aperture, the longer the focal length, and the closer the focusing distance, the shallower the depth of field;Conversely, the smaller the aperture, the shorter the focal length, and the farther the focusing distance, the deeper the depth of field. A wide aperture is when the aperture value is small, such as f14，f2.8 etc.
When we take photos with a wide aperture, the depth of field becomes very shallow, which means that only the area near the focus point is sharp, while the area before and after the focus point is blurred. In this way, focusing becomes very important, because once the focus is not accurate, it will cause the subject to be unclear and lose meaning. The difficulty of focusing depends on the size and position of the focus point, as well as the environment and conditions of the shooting.
The size and position of the focus point are determined by the camera's focusing system. Different cameras have different focusing methods, such as phase focus, contrast focus, hybrid focus, etc. Different focusing methods have different advantages and disadvantages, such as fast phase focusing speed and high accuracy, but sensitive to light, slow focusing speed and low accuracy, but not sensitive to light, etc. Different focusing methods also have different distribution and shape of focus points, such as single-point focusing, multi-point focusing, area focusing, face focusing, etc. Different focus points are distributed and shaped to affect how easy it is to focus, such as single-point focus is more precise but more difficult to control, multi-point focus is more flexible but more likely to be out of focus, etc. The environment and conditions of the shooting are determined by the subject and background of the shooting. Different subjects and backgrounds have different focusing difficulties, for example, a stationary subject is easier to focus than a moving subject, a simple background is easier to focus than a complex background, etc. The environment and conditions of the shooting will also affect the effect of focusing, such as the darker the light, the more difficult it is to focus, the more vivid the color, the easier it is to focus, etc.
In summary, a wide aperture can make focusing difficult because it reduces the depth of field and increases the focus requirements, which in turn are affected by the camera's focus system, as well as the subject and background of the shot.
How to solve the focus problem with a wide aperture?
To solve the focusing problem of large aperture, we can start from the following aspects:
Choose the right focus. According to different cameras and lenses, choose the most suitable focusing method for taking photos with large apertures, such as phase focus, contrast focus, hybrid focus, etc. Generally speaking, phase focus is more suitable for taking photos with a wide aperture because it is fast and accurate, but pay attention to the influence of light to avoid focusing deviations. Contrast focus is better suited for low-light shots because it's not sensitive to light, but be aware of the effect of speed to avoid focus lag.
Choose the right focus point. According to different focusing methods, choose the most suitable focus point for taking photos with a wide aperture, such as single-point focus, multi-point focus, area focus, face focus, etc. Generally speaking, single-point focus is better for shooting at a wide aperture because it is more precise, but care should be taken to control the position of the focus point to avoid inaccuracy in focus. Multi-point focus is better for taking photos in complex environments because it is more flexible, but be careful to prioritize the focus point to avoid focus confusion. Adjust the appropriate shooting distance. According to different lenses and focal lengths, adjust the shooting distance that is most suitable for shooting with a wide aperture, such as close-range, medium-distance, long-distance, etc. Generally speaking, the closer the shooting distance, the shallower the depth of field, the more difficult it is to focus, and the farther the shooting distance, the deeper the depth of field, the easier it is to focus. Therefore, according to the subject and effect of the shot, choose the appropriate shooting distance and avoid being too close or too far.
Make use of aids. Depending on the camera and function, make use of some auxiliary tools such as tripod, remote control, live display, zoom function, etc. Generally speaking, a tripod can help stabilize the camera and avoid shaking, a remote control can help control the camera remotely and avoid touching, a live display can help observe the picture and avoid losing focus, and a zoom function can help focus on details and avoid blurring. Summary.
The difficulty of shooting with a wide aperture is the focus problem, which is affected by factors such as depth of field, focusing system, subject and background. To solve this problem, we can choose the appropriate focusing method, focus point, shooting distance, and auxiliary tools to improve the speed, accuracy and effect of focusing, and shoot with a sharp and wide aperture**.