1In the backlight, side light, complex environment to prevent the entry of non imaging light, to avoid the impact of fog on imaging. 2When the camera is not in use, the lens cover can protect the camera lens from dust and impurities. Dust cloth can clean the lens and body surface impurities and dust. 3CPL is a commonly used filter that eliminates unnecessary reflections and can eliminate most of the reflections on non metal aspheric surfaces. 4UV filter is suitable for shooting in environments such as seaside, mountain, snow and open areas, and can reduce the blue tint caused by ultraviolet rays. At the same time, for the camera, it can also eliminate the interference of ultraviolet rays on imaging, which helps to increase the effect of sharpness and color reproduction. 5Generally used in landscape photography, the sky is bluer when shooting, and the reflection on the water surface is eliminated when shooting the water surface, and the scene under the water surface is photographed, making the whole picture clearer and more transparent.