Note: This product is made in China)
A UV lens is actually an ultraviolet filter. For traditional photographers, a UV lens is one of the must-haves. Although our naked eyes cannot see ultraviolet light, it can make photosensitive materials such as film light sensitive and reduce the vividness of colors. At this time, we need a UV lens to filter out these ultraviolet rays, reduce the blue-violet light waves transmitted to the photosensitive material, make the distant view clear, and improve the contrast and color saturation of the distant view. Since the UV lens is close to colorless and transparent, it can generally be used as a lens protection cover. Digital cameras are sensitive to red light and infrared light but to blue-violet light(Especially ultraviolet light)It is not sensitive, so adding a UV lens to a digital camera will not get the desired beneficial effects, so UV filters are not so necessary.
UV mirrors and skylight mirrors are used to absorb ultraviolet rays. The difference between UV mirror and skylight mirror: UV mirror can effectively absorb ultraviolet rays, but has little effect on color balance. In addition to the function of a UV mirror, the skylight mirror can also play a role in color balance. The UV mirror is a transparent lens with almost no color, while the sky mirror has a very light magenta color and is divided into 1A and 1B (the density is slightly different). The use of UV lenses and skylight lenses does not require compensation of exposure, so they are often installed in front of the lens to protect the lens for a long time.
But one more layer of lens adds another factor that affects image quality. The flatness of the skylight lens or UV lens and the chromatic aberration of the skylight lens may affect the image quality. Therefore, if there is a higher requirement for the sharpness of the image, the subject is not under strong ultraviolet rays, it is best to remove the skylight lens or UV Mirror shooting.
As a world-renowned brand, KENKO produces excellent UV quality, and almost no impact on image quality is noticed.
Double-sided UV coating is to coat a layer of film on both sides of the lens to ensure a light transmittance of more than 90%. Because the coating is small, the price is cheap, and it is easy to maintain. Unlike the multi-layer coating and the super coating, which are easy to spend, the double-sided coating is very convenient to wipe.
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 caused by the uneven lens will be more severe. After all, it is not an integrated lens, Luokou will inevitably have errors