Ordinary UV mirror:
I think the most common filter is the UV lens. It is better to say that it is the best protective lens for digital camera lenses than it can improve the effect of photos. During the trip, wind and rain are inevitable, and the seemingly humble dust may become the deadly killer of the delicate lens! This is the role of the UV lens. It not only prevents rain or other water droplets from intruding into the lens, but more importantly, it can effectively prevent the coating on the lens from being scratched by sand and dust. Therefore, a good UV mirror is essential for traveling.(Note: UV lenses were previously used to absorb ultraviolet light, but this function has been weakened in digital cameras. Therefore, most people now equip digital cameras with UV lenses for the purpose of protecting the lens.)
UV lens can filter out ultraviolet rays, which is not harmful to black and white and color negative images; it can also be often left on the lens as a protective lens.
For digital cameras, UV is mainly used to prevent fingers from touching the lens and dust from entering the lens. As for the function of filtering ultraviolet rays, it is second.
In addition, before using filters such as CPL, remove the UV as much as possible to reduce the chance of imaging circles and improve the image quality.
When facing the light source, especially the night scene, please remove the UV. Otherwise the glare will be more severe.
UV lens is suitable for shooting in the seaside, mountain, snow field and open area, etc. It can reduce the blue tint caused by ultraviolet rays. At the same time, for digital cameras, it can also eliminate the interference of ultraviolet rays on the CCD, which helps to improve the clarity and color reproduction.
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