In sports photography, the focus is a difficult skill to master, it is because sports are the subject of photography is highly dynamic, very fast, it is unlikely to allow you to slowly digest, excellence in focus. Professional sports photographers are to track the focus: the changing focus, feel free to let competitors in the frame to maintain a clear image. However, this technique is difficult trained novice photographer consummate.

Easier way is by means of the camera’s AF system. Although the AF system can quickly focus on the good, but if you use the wrong method, you can not play its desired effects. That is, only the subject is just right to stay in the center of the viewfinder frame distance in order to achieve accurate focusing purposes. If the camera is equipped with a lens focal length is not long, the larger perspective, the movement of the subject is placed in the center ranging viewfinder frame, fairly easy; if the camera lens is equipped with 200 mm long focal length lens, the perspective of small, it is necessary to track the subject, but also aligned distance box, you may feel very difficult. To accommodate this situation, may wish to change this habit, can not to consider the scope viewfinder, how to track using only the subject ranging frame, so in the sense that may be easier. If athletes want to be taken outside of filming in one central location, but also the use of automatic ranging system, should use the focus automatic locking device, so that the focus in place. If the subject was fierce mobile-like, time does not allow use of locking devices, which require the composition nor subject other than put in one central location is not, then we must lift the auto focus, manual focus instead .

Sports photo shoot there is a common focusing method, that is the trap focus, that is, when the subject is scheduled to focus immediately pressed into the camera shutter. Some of the advanced camera for with such performance. Traps are suitable for sports photography focus, such as the use of this method to capture the action bar high jumpers to fly very well. When shooting, you can adjust the focus of the first athletes may at some point over the bar, and then lock the focus, it no longer move back and forth, and finally, as the case of athletes over the bar when pressing the shutter, you can take to the definition is high photo.

It is worth saying is, if the subject is a very high speed movement, such as car racing, we are focusing in the use of a trap technique, you must also press the shutter advance. That should be in place before the main body arrived at this moment press the shutter. In advance by the shutter, you can press the shutter to compensate for the shutter lag period between the actual opening. Of course, some of the advanced auto-focus camera’s focusing capability has catch up the speed of the car, even if the maximum speed the car is horizontal from the screen quickly passed, you can shoot it down. If you exercise before the filming is not clear what point the object will pass through only know through a region, you can use the regional focus mode when shooting with high-speed film as much as possible, according to lighting conditions and film speed to make use of small aperture. Focus, depth of field according to the table on the lens, so that this region is within the depth of field, the exact focus of the party in the region close to the camera 1 / 3, because the future is less than after the deep depth of field. This operation, you can get good results. If the player appears in the far distance, you can shoot in ultra-focus approach. Depth of field from the table on the lens when shooting can be found with the corresponding depth of field with the aperture range, and then turn the focusing ring to align the focus ring after the depth of field marks the infinity symbol, which will enable you to use in the next aperture maximum depth of field. If taken regularly athletes will appear in several different areas near and far, can be used to make a tape loop, put the ring in the distance, the best white paper with a few special areas set the mark, just before the picture in accordance with the marked focus, you can very quickly determine the focus position, do not have to focus through the viewfinder.

Focus of the purpose is to obtain high quality images, the focus clearly is the tomb of the requirements. But for beginners, it requires a clear focus of each photo can have some difficulty, because of many factors point clearly, if not a very good grasp, it is difficult to obtain clear images. Here are a few good way to keep a clear focus for beginners reference:

1. To prevent vibration. Vibration would shake the image in the blurred photos, even a very accurate image of the original focus will therefore affect the imaging and clarity. Vibrations generated are generally two reasons:

One camera shake, that you press the shutter, the camera shake caused instability in the control.

Second, the main movement, that is, the moment the camera shutter open, your subject in motion their own, while the shutter speed is not high enough, did not freeze live dynamic, resulting in image blur.

To avoid camera shake, you can take measures three aspects: ? the camera mounted on a tripod, steady the camera. If by the shooting conditions, can not support the tripod, monopod can also be switched. ? high shutter speed (generally use 1 / 250 second shutter speed), can produce images of reduced camera shake shake. ? The correct method of holding machine. In the case without a tripod, holding the correct posture machine or not, will directly affect the stability of the camera. Your subject themselves to overcome motion blur, only one way, that is to increase the shutter speed, as long as conditions permit, the shutter speed faster, the better.

2. Not one-sided pursuit of a small aperture. Beginners that small aperture will increase the depth of field, must make the image clear, therefore, regardless of where they tend to charge very small aperture, especially when the focus is not sure, but I believe the small aperture can be of help. But the final results do not always ideal, because the use of small aperture will lead to lower shutter speed, and thus lead to camera shake. Therefore, one-sided pursuit of a small aperture is not the best, the correct way should be actively using high shutter speeds and a tripod.

Japanese Photography in Focus small Kubo good guitar has its own unique way. Each shot, he should be back three cameras, the focus of the camera as follows: the distance of 10 meters of their location, using a 100 mm zoom lens, focal length 100; distance of 20 meters, with 200 mm zoom lens, the focal length of 200; distance of 30 meters, with 300 mm zoom lens, the focal length of 300. In his view, such a distraction when shooting do not have to adjust the focal length, the results can determine whether the visual frame by which the camera.