Adding a UV lens in front of the lens can effectively filter out ultraviolet rays and improve the sharpness of the photo. For alpine photography or high-altitude photography, you can make distant scenes clearer and restore more realistic and gorgeous pictures. So at that time, the UV mirror became a necessary color filter. Because UV mirrors can not only improve imaging, but also protect the lens from dust and fingerprints. and so. UV mirrors are installed in front of the lens without taking off, making it the most widely used color filter.
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