HOYA PRO1 Low Profile Frame DMC UV(O) Multicoat Digital UV Fliter 49/52/55/58/62/67/72/77/82 mm For Camera Lens
WHAT IT DOES
Ultraviolet or “UV” filters block some UV light from entering the camera lens. In outdoor photographs UV light increase the effect of atmospheric haze making distant subjects, such as mountains, in scenic photos less sharp. Be removing some of the UV light it reduces some atmospheric haze yielding clearer scenic photos.
Most people also us UV filters to protect their lens. Lenses can be expensive and so can repairing them if they get damaged. These filters provide an excellent first line of defense for the front element of the lens. High-quality UV filters can remain on the lens at all times as they have no effect on indoor photos and do not reduce the amount of visible light entering the lens.
HOW IT WORKS
A UV filter has glass that is specially formulated to absorb UV light at a certain wavelength and lower.
UV light that is not blocked by the earth’s atmosphere has wavelengths beginning at 315nm and going up to the visible violet light at the 400nm upper end of the visible spectrum. This light is commonly known as UV-A and not only is it bad for your eyes its bad for your photography. The visible light spectrum runs between 400mn violet and 700nm red. Even though UV light cannon be seen by the human eye it can have a negative impact on photos.