Traditional Culture Encyclopedia - Photography and portraiture - How to shoot the fixed focus well
How to shoot the fixed focus well
1. The luckiest method: autofocus. This is the easiest way to capture pictures. A slightly better camera has an autofocus system. If the camera is equipped with a lens with short focal length and large viewing angle, it is relatively easy to arrange the moving object in the ranging frame in the center of the viewing frame. If the camera is equipped with a long focal length lens of more than 200 mm, it may be difficult to track the subject and aim at the ranging frame because of the small viewing angle. In order to adapt to this situation, we might as well change the above habits, and it may be easier to temporarily track the subject with a ranging frame without considering the scope of the viewing frame. If the subject moves violently, it is not allowed to use the locking device in time, and the composition requires the subject to be outside the center of the picture, then the automatic focus must be cancelled and replaced by manual focus.
2. The method that needs to be predicted most: trap focusing. This is a common way to focus when shooting sports photos. Simply put, when the subject enters the predetermined focus, press the shutter of the camera immediately. Some advanced cameras have this performance. Trap focusing is very suitable for sports photography, and it is the most ideal way to shoot athletes in sports. When shooting, you can focus on a point where the player may pass the ball. Then lock the focal length so that it doesn't move back and forth, and finally press the shutter according to the situation that the athlete moves in front of the camera, and you can take high-definition photos.
3. The safest way: prepare multiple zoom lenses in advance. Some professional photographers have to carry three cameras every time they shoot. The focal length of each camera is determined as follows:10m from their position, 100 mm for zoom lens and100 for focal length; If it is 20 meters away, use a 200 mm zoom lens with a focal length of 200; 30 meters away, with a 300 mm zoom lens and a focal length of 300. He believes that there is no need to be distracted to adjust the focal length when shooting, and you can judge which camera to use according to the visual effect. So you won't miss every wonderful moment.
Matters needing attention
1. Prevent vibration. Vibration will make the image in the photo shake and blur, even if the original image is in focus accurately, it will also affect the clarity of the image. There are generally two reasons for vibration: First, the camera vibrates, that is, when the shutter is pressed, the camera shakes due to unstable grip. The second is the motion of the subject, that is, at the moment when the lens shutter is opened, the subject is in motion, and the shutter speed is not high enough to freeze the motion, so the image is blurred. There is only one way, and that is to increase the shutter speed. As long as conditions permit, the faster the shutter speed, the better the effect.
2. Don't pursue small aperture unilaterally. Beginners think that a small aperture will increase the depth of field and will definitely make the image clear. Therefore, they often turn off the aperture very small regardless of the occasion, especially when they are not sure about focusing. They believe that a small aperture can help them. However, the final result is often not ideal, because using a small aperture will lead to a decrease in shutter speed, which will cause camera vibration. Therefore, it is not the best policy to pursue a small aperture unilaterally. The correct approach should be to actively use high-speed shutters and tripods.
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