ดูว่าดีไหม Kenko UV filter ฟิลเตอร์ป้องกันหน้าเลนส์ 40.5 / 43 / 46 / 49 / 52/ 55 / 58 / 62 / 67 / 72 / 77 mm

รายละเอียดของสินค้า Kenko UV filter ฟิลเตอร์ป้องกันหน้าเลนส์ 40.5 / 43 / 46 / 49 / 52/ 55 / 58 / 62 / 67 / 72 / 77 mm

The UV lens is the ultraviolet filter, which has two main functions:
First: Prevent ultraviolet light. Ultraviolet rays are rays with a wavelength of 200-400 nm emitted by the sun. It is also one of the shortest wavelengths in the sunlight. This kind of radiation is invisible to the naked eye, but it can cause the photosensitive materials such as film and other sensitive materials to undergo photosensitization, which reduces the color of the photographic image. At this time, we can filter out these ultraviolet rays with a UV mirror, reduce blue-violet light transmitted to the photosensitive material, make the vision clear, and improve the contrast and color saturation of the distant view. In some special occasions, such as plateau, ultraviolet is extremely strong, plus a UV mirror is still necessary.
Second: protect the DC lens. Because most of the DC lenses are exposed to the outside, it is easy to be contaminated by dust, water droplets, oil stains or finger prints, which requires us to wipe the lens frequently, and the DC lens is very delicate. Once the wear of the mirror is difficult to recover, it will undoubtedly seriously affect the clarity and quality of the picture. In addition, careless collisions with foreign bodies in ordinary use will have irreparable consequences. So install a transparent UV protection lens outside the lens to protect the lens from direct contamination or damage. On other special occasions, such as water, there is a lot of moisture In the space of a sudden accident, especially in a bad shooting environment or in windy and sandy weather, because many uncertain factors may cause the lens to be defaced, a UV mirror can be used to protect the lens very well. There is not a good saying: "UV in hand, everything is not afraid."
The UV mirror is a necessary filter for DV, not because it can filter out ultraviolet rays, thus improving the clarity of distant objects. What's most critical is that the DV lens can't be replaced, and you always don't want to leave some scars on those famous marks like “Zeiss” because of a careless friction or collision? So don't hesitate to screw on a UV mirror before you buy DV. If you touch the UV, the lens can be changed, and if the lens is damaged, it can be very serious.