Generally, people often ignore the importance of tripods when taking pictures with digital cameras. In fact, photos are often taken without the help of tripods, such as star orbit shooting, running water shooting, night scene shooting, macro shooting and so on. The function of tripod can't be ignored for amateur users or professional users. Its main function is to stabilize the camera and achieve a certain photographic effect. The most common way is to use a tripod in long-time exposure. If users want to take pictures of night scenes or moving tracks, they need longer exposure time. At this time, if the camera does not shake, they need the help of a tripod. Therefore, the first factor in choosing a tripod is stability.