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. The vapour-deposited multilayer coating ensures that both the front and back sides of the filter are coated, preventing 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 mount is made of black anodized metal, and the blackened inner edges help prevent reflections. Edge sealing protects against dirt, and the frame retains its shape despite temperature fluctuations.