Combining two of the most useful filters available, Luminesque's 77mm Circular Polarizer and UV Slim PRO Filter Kit is well-suited to all forms of photography. Both filters are constructed from Schott optical glass and feature a 12-layer multi-coating for maintained clarity and image quality. Each filter is also set in an anodized aluminum filter ring, with the UV filter featuring a slim 3.4mm-thick profile to lessen the likelihood of vignetting with wide-angle lenses. The UV filter is a general use, clear filter that helps to absorb ultraviolet light and reduce the bluish cast of daylight. It is also useful as a general protective filter to leave on lenses at all times in order to reduce dust and moisture from reaching the front lens element and to provide additional protection in case of accidental impacts. Its 12-layer multi-coating also helps to achieve 98.2% light transmission for faithful color reproduction and contrast. The circular polarizer filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A circular polarizer differs from a linear polarizer in that it supports full use of a camera's autofocus and auto exposure functions.