What problems should be paid attention to when the camera shoots with track?

Answer; Attention should be paid to the following points: communication: Before shooting, the director, photographer and photo assistant must communicate in detail, meet the requirements of plot or art as much as possible under the condition of technical embellishment, and master the position and rhythm of action during shooting. 2. Speed: The speed should be even and consistent with the plot. Many photo assistants only pay attention to how smooth the car is pushed, but ignore the coordination between speed and plot; In addition, we should also pay attention to the influence of image scaling speed. 4: 3 and 16: 9 are shot at the same speed, and the speed of the picture feels different. 3. Start-stop: Quick start-stop will have great inertia, and the picture will shake (except for the column rail car), even if it is tightened by the strapping machine, so as to avoid rapid speed change as much as possible. 4. Safe driving: always pay attention to the running distance of the rail car to prevent the rail car from rushing out of the track at the end of the track. We can put a mark on the track as an auxiliary position reference when we move ahead, and the mark can also be used as a moving position point or a speed change point according to the needs of the plot. 5. The picture is stable: there will be imperceptible vibration when moving smoothly, and there is no problem shooting with wide-angle and medium-focus lenses. However, the telephoto lens is bound to shake the picture, which is inevitable. The telephoto lens will exaggerate this shake, just like looking for stars with an astronomical telescope. There is a slight shaking here, and there is already a deviation of tens of thousands of kilometers. Try not to shoot on the rail car with a telephoto lens. In addition, it is also necessary to prevent photography assistants and staff from stepping on the track during shooting, which will also affect the effect of the picture. Maintenance 1. Severe vibration should be avoided during long-term transportation. After arriving at the shooting scene, check whether there are any loose screws in time, and tighten them immediately if there are any loose screws. 2. After shooting in sand, damp or water, wipe the rail car and track clean, and add a proper amount of high-quality lubricant to the bearing part of the rail car. 3. Don't soak the wheel of the rail car in oil for a long time, and wipe it as soon as possible once it is contaminated, otherwise it will lead to the aging of the wheel body. 4. Store it in a dry place for a long time. Don't press the wheels of the rail car on the ground, but lean against the wall. Or put the information bar code on the wheel: 4993611056391564 Qi Xin rocker arm professional camera rocker arm specifications: AQ-B series (triangular arm): AQ-B7.8-AQ-B 15m. AQ-C series (square arm): AQ-C6.6-AQ-C9 m. DV camera rocker specifications: A Q-L series: A Q-L 3.6m-AQ-L 8.4m. A Q -M series: AQ-M300-AQ-M600 small rocker specifications: AQ -7 rocker is 2.6m long, thank you.