Ideal lens protection made of optical glass, color neutral. MC8 coating features four layers on each side for high light transmission and maximum anti-reflection with a vapor-deposited multilayer coating. Both the filter front side and back side are coated to prevent loss of contrast and brilliance, as well as ghosting and double images. The ultra-thin wide-mount design prevents vignetting and can remain permanently on the lens, extending the lens mount hardly at all. A protected front lens saves on expensive repair costs. The filter is made of optical glass, with a black anodized metal filter mount and blackened inner edges to prevent reflections. Edge sealing protects against dirt, and the frame retains its shape despite temperature fluctuations.