What is the use of UV mirror in SLR camera? What brand is generally better?

1. In the film era, the existence of UV mirrors is to reduce the entry of ultraviolet rays; In the digital age, the only purpose of UV mirror is to protect the lens, so the transmittance is the most important index.

2. Kengo's Pro 1D series digital protective glasses are highly recommended, with low price and good light transmittance;

3. Because the UV mirror is used to protect the lens, it should be used when the lens needs to be protected. Because the lens always needs to be protected, the UV mirror has been used.