What is a UV mirror What is a UV mirror used for?

A UV lens is a type of DC filter that is added to the lens to filter ultraviolet rays. Some low-end UVs are currently used to protect the lens from dust and scratches.

Explanation of terms: UV mirrors were originally used to filter out ultraviolet light in the air, but because ordinary UV mirrors are single-layer coatings, the effect of filtering ultraviolet light is not good, so the function of UV mirrors is mainly used to protect lenses. Unless you buy a multi-layer coated UV lens, it can also play a role in filtering out ultraviolet light, but in practical application, it is only in very sunny weather, shooting distant mountains, beaches, etc., which has a little effect, so that the picture looks more transparent and removes some fog, the effect is not obvious, and it is very useful in traditional photography.

Category: Electronic Digital.

Problem description: What is the UV mirror used for? What should I pay attention to when buying?

Analysis: UV lens is ultraviolet filter. The main function of the sail return UV mirror is to absorb ultraviolet rays with a wavelength below 400 nm, and has no filtering effect on other visible and invisible light.

The principle of the passing filter is leaded glass, so it is heavier.

UV mirrors are usually colorless and transparent. However, due to the influence of the anti-reflection coating, it may appear at some angles** with different impulse colors.

In foggy weather and high-altitude environments, ultraviolet rays are stronger, and the image will be clouded with a blue-purple hue. Therefore, the addition of UV lenses can absorb ultraviolet rays and eliminate the interference of ultraviolet rays on CCD, which helps to improve the clarity of the impact and the restoration effect of colors.

The intention of many photographers to buy UV lenses is not to filter ultraviolet rays, but to protect the delicate lens coating, in fact, the lens coating is also very hard and rarely damaged. Of course, it would be better to add a UV mirror.

UV mirrors are available in both domestic and imported versions. If the purpose is just to protect the lens, then you can also buy a domestic one, just be careful not to cast the color, and pay attention to the wide angle end and especially the telephoto end can focus clearly without any problems. I bought the Olympus C2100UZ with Kenko's 49mm multi-layer coating red box, the single layer coating has a light transmittance of 90, the light transmittance of the multi-layer coating is 95, and the light transmittance of the super coating is 98, which is a big difference.

I think the multi-layer coated UV is more moderate.

The UV lens has been used for a long time, and it feels good, because it is 49mm, there is no need for an adapter ring, and it can be used directly by screwing it on, and the original Olympus lens cap can also be used, which is very convenient. Two days ago, I started to think about buying CPL ND8 close-up lenses, and I began to think about the lens size. There are many brands, models, and types of 52mm lenses, while 49mm lenses are rare.

Only 49mm CPL can be bought in the market, and there are no ND8 close-up lenses. And 52mm lenses can be found.

So, I bought a 49-52mm adapter ring, 8 RMB. The 52mm lens cap is 5 RMB.

The 49-52 adapter ring can be screwed directly on the UV lens, and the UV lens can be used to protect the lens for a long time without taking it off. If you don't normally have a 52mm lens attached, you can close a 52mm lens cap. The box of the UV lens is equipped with the original Olympus 49mm lens cap, and it rests in the box of the C2100uz.