What is the function of uv mirror?

Do you know what a uv mirror is for? I believe many people don't know what a UV mirror is. UV mirror is a filter used by digital cameras, so what is the function of UV mirror? Let's take a look with me and find out what the function of UV mirror is.

What is the function of uv mirror? 1 1, the role of uv mirror

1, UV mirror, also called UV filter, refers to a filter used in digital cameras. UV mirrors are usually colorless and transparent, and some will appear purple or purplish red at a specific angle because of antireflection films.

2. The main function of 2.UV mirror is to absorb ultraviolet rays with wavelength below 400 nm, but it has no filtering effect on other visible/invisible rays. Ultraviolet rays can be filtered because the lens contains lead, so the ultraviolet lens is heavier than other lenses of the same size and thickness. At the same time, the UV mirror can prevent the coating on the lens surface from directly contacting with the external environment, thus playing a protective role.

3.UV mirror is suitable for shooting in seaside, mountains, snowfields and open areas, which can weaken the blue tone caused by ultraviolet rays. At the same time, for digital cameras, it can also eliminate the interference of ultraviolet rays on CCD, which is helpful to improve the definition and the effect of color reproduction; Selection of uv mirror: generally choose UV, first look at whether it is multi-layer coating (MRC) and then look at light transmittance. Even the same brand, uv is divided into the following grades: low-end: transmittance below 95%, and the price is dozens of pieces. Among them, there is even a single coating. The filter ring is made of aluminum alloy, and the workmanship is sloppy. The filter glass has not been treated with black edge. Mid-range: the light transmittance is 97% ~ 98%, which is the most cost-effective filter specification. Multi-layer coating, copper ring and black edge treatment of the filter are standard configurations. According to product segmentation, there will be nano-coating, ultra-thin ring, oil and pollution prevention and other functions. At present, the prices of products are generally above 150 yuan (calculated by 58mm), and some high-quality products can reach 500+. Classic models include B+W MRC Slim, Kenko Pro 1D/L37, Hoya Pro1D. The light transmittance of these products is not less than 99%, even 99.7%. The classic models are B+W MRC Nano, Kenko Zeta and Hoya HD.

What is the function of uv mirror? 2. Function of 2.uv mirror

UV mirror can filter out ultraviolet rays in the sun, so it is also called ultraviolet filter. Generally, it is colorless and transparent, but some of it will appear purple or purplish red at some angles because of the antireflection film. Many people buy UV mirrors to protect the precious lens coating, which is actually only an accessory function. UV mirror can weaken the blue tone caused by ultraviolet light. At the same time, for digital cameras, it can also eliminate the interference of ultraviolet rays on CCD, which is helpful to improve the definition and color effect.

UV mirror is actually a kind of ultraviolet filter, its main function is to absorb ultraviolet rays with wavelength below 400 nm, and it has no filtering effect on other visible/invisible rays. Because too much ultraviolet rays will affect the imaging quality, the UV mirror is one of the necessities for traditional photographers, but for digital cameras and owners of digital cameras, the sensitivity to ultraviolet rays is not as good as that of traditional films because they are CCD photosensitive elements, so at this time, the UV mirror is actually just a flat glass, which mainly plays the role of protecting lenses. It can be said that its protection is far greater than filtration.

Second, the benefits of uv mirror

In photography, UV mirrors are used to protect the lens and filter light. The lens in the camera is the most precious, so we should strengthen protection. Installing UV lenses can prevent some dust erosion, and of course it is very convenient to wipe, so don't worry about rubbing the lenses. The lens receives light when taking pictures, just like people look at objects. Seeing things in strong light makes you uncomfortable and tired. So you put on color filter glasses, and your eyes feel much more comfortable. That's because the lens blocks some strong ultraviolet rays and allows your eyes to accept external things under negative conditions.

The same is true of the UV lens on this lens. On the one hand, it can effectively prevent the invasion of strong ultraviolet rays from causing image clarity, and on the other hand, it can prevent some air pollution from corroding the lens. When shooting film with a traditional camera. Due to the chemical characteristics of film, it is particularly sensitive to ultraviolet rays in the sun. In places with strong ultraviolet rays, photos taken with film are generally blue and white. Seriously affected the quality of photos. Adding a UV mirror in front of the lens can effectively filter ultraviolet rays and improve the clarity of photos. For mountain photography or aerial photography, it can make the distant scenery clearer and restore a more realistic and gorgeous picture. So at that time, the UV mirror became a necessary color filter. Because UV mirror can not only improve imaging, but also protect the lens from dust, fingerprints and other pollution. UV mirror is always installed in front of the lens without removal, which makes it the most widely used color filter.